Zj�Fq��f��Ґt�yU�t�����RvEW���]Бe(O��RT����L;UK�e�&\yc�E7�s�Ȗ?�����ڏ �y�6��q��L�7cI����T�]�z�p�0$�TT���;p"d�kSB�� Mesophyll can then be divided into two layers, the palisade layer (D) and the spongy layer (F). Sometimes leaves are divided into two or more sections called leaflets. Leaf base c. Midrib d. Petiole _____ 1. 0000012640 00000 n Leaves make it possible for plants to fulfill their role as primary producers in food chains. 0000008128 00000 n The word mesophyll is greek and means "middle" (meso) "leaf" (phyllon). Leaf Anatomy Coloring. Few big, motor or bulliform cells are present in groups here … 0000009002 00000 n 0000011493 00000 n 1043 0 obj <> endobj Metcalfe, C. R. and Chalk, L. (1979), Anatomy of the Este trabalho teve por objetivo descrever e Dicotyledons: Systematic Anatomy of Leaf and Stem, comparar a morfo-anatomia das folhas adultas de with a Brief History of the Subject. 0000002077 00000 n %%EOF Tree Anatomy the base of the tree. is the upper layer of cells and is shaded a little lighter than the lower layer; North Carolina State University; BIOLOGY 163 - Fall 2019. 0000008309 00000 n Leaves may be simple, with a single leaf blade, or compound, with several leaflets. �+�p�L#���\n�2�y��YpG��XE0K�'��j�*��+���kdއ�ޞG��: 0000043705 00000 n Leaf Anatomy The leaf is the primary photosynthetic organ of the plant. However, the mechanistic basis of variation in the hydraulic conductanceoutside the xylem (i.e. Internal Tree Leaf Structures The leaf blade is composed of tissue layers, each having an important part to play in a functioning leaf. The purpose of this work was to study the anatomy and morphology of the leaf, comparing rubber tree &91;Hevea brasiliensis (Willd. ex Adr. Plant Organs - Leaf. Photosynthesis is the process of absorbing energy from sunlight and using it to produce food in the form of sugars. Leaf anatomy 92 Figure 6.1.—Cross sections of leaves in Hypoxis (sectional names in brackets). Leaves are responsible for converting sunlight and carbon dioxide into glucose, which is used to provide energy to the plant. Color the cross section of the leaf. LEAF ANATOMY The leaf is the primary photosynthetic organ of the plant. Rather than enjoying a good ebook subsequent to a cup of coffee in the afternoon, on the other hand they juggled once some harmful virus inside their computer. Within angiosperms, the monocots and dicots are also seen to be anatomically different. Longitudinal and transversal sections of mature leaf blades Anatomy of the Leaf: Read the following passage about the parts of a leaf. A leaf (plural leaves) is the principal lateral appendage of the vascular plant stem, usually borne above ground and specialized for photosynthesis. ���O`�`z &v�LK.0�a��à��b�0�A��]��AA������n�fu��b����8�2�e�I�a�Ƞs&���:���� � �)h� endstream endobj 73 0 obj 343 endobj 36 0 obj << /Type /Page /Parent 32 0 R /Resources 37 0 R /Contents 44 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 37 0 obj << /ProcSet [ /PDF /Text /ImageC ] /Font << /F2 42 0 R /F3 40 0 R /F4 51 0 R /F7 57 0 R /F10 49 0 R /F11 61 0 R /F13 50 0 R /F15 39 0 R /F17 54 0 R >> /XObject << /Im1 63 0 R /Im2 71 0 R >> /ExtGState << /GS2 65 0 R >> >> endobj 38 0 obj << /Type /FontDescriptor /Ascent 1159 /CapHeight 1104 /Descent -389 /Flags 34 /FontBBox [ -44 -241 978 718 ] /FontName /MJIOMJ+Aldine401BT-Bold /ItalicAngle 0 /StemV 0 /CharSet (/P/s/L/a/t/T/v/n/l/e) /FontFile3 70 0 R >> endobj 39 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 180 /Widths [ 248 0 0 0 0 0 750 0 405 405 0 0 0 0 248 0 495 495 495 0 0 0 0 495 495 495 271 0 0 0 0 419 0 726 722 784 854 675 599 826 877 386 0 745 675 971 877 0 687 0 732 580 760 0 691 954 0 701 0 0 0 0 0 0 0 512 590 497 595 505 366 544 608 316 0 569 316 920 610 569 604 0 425 394 373 604 509 773 0 496 569 0 0 0 0 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 248 0 0 248 248 248 248 248 0 248 248 248 248 248 248 248 0 248 248 248 ] /Encoding /WinAnsiEncoding /BaseFont /MJIOMJ+Aldine401BT-Bold /FontDescriptor 38 0 R >> endobj 40 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 173 /Widths [ 299 0 0 0 0 0 0 0 326 326 0 0 299 347 299 0 597 597 597 597 597 597 597 597 597 597 0 0 0 0 0 558 0 558 618 601 657 542 502 641 653 248 0 590 465 822 667 644 566 0 606 604 456 628 558 815 0 509 514 0 0 0 0 0 0 523 528 479 530 523 280 490 537 220 220 472 220 824 537 528 530 528 308 454 308 537 419 655 400 421 382 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 0 0 0 0 0 299 0 0 0 0 0 0 0 0 0 0 0 0 347 ] /Encoding /WinAnsiEncoding /BaseFont /MJIONK+FrnkGothITCBkBT /FontDescriptor 43 0 R >> endobj 41 0 obj << /Type /FontDescriptor /Ascent 1120 /CapHeight 1120 /Descent -297 /Flags 32 /FontBBox [ -54 -192 876 709 ] /FontName /MJIOMH+FrnkGothITCBkBT-Bold /ItalicAngle 0 /StemV 0 /XHeight 830 /CharSet (/period/r/six/h/V/P/s/i/F/L/a/t/j/M/u/one/T/O/Y/A/v/g/m/colon/b/two/Z/C/\ three/o/c/R/D/d/y/n/p/l/e/S/G/E/hyphen/N/four/five/U/f/I) /FontFile3 66 0 R >> endobj 42 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 180 /Widths [ 304 0 0 0 0 809 0 0 331 331 0 0 304 347 304 278 608 608 608 608 608 608 608 608 608 608 304 0 0 0 0 0 0 603 638 637 685 591 543 668 684 300 0 632 507 851 691 688 622 688 659 641 480 656 603 868 568 540 580 0 0 0 0 0 0 572 571 525 571 579 349 555 568 266 272 551 266 852 568 575 560 570 367 520 367 568 477 694 495 489 444 0 0 0 0 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 304 0 0 304 304 304 304 304 0 304 304 304 304 304 304 304 0 304 304 304 ] /Encoding /WinAnsiEncoding /BaseFont /MJIOMH+FrnkGothITCBkBT-Bold /FontDescriptor 41 0 R >> endobj 43 0 obj << /Type /FontDescriptor /Ascent 1120 /CapHeight 1120 /Descent -310 /Flags 32 /FontBBox [ -69 -192 819 709 ] /FontName /MJIONK+FrnkGothITCBkBT /ItalicAngle 0 /StemV 0 /XHeight 830 /CharSet (/period/r/quoteright/h/P/s/i/W/L/a/t/j/M/u/T/O/H/A/v/g/m/b/C/w/x/o/c/D/d\ /y/n/l/p/e/comma/S/E/z/f/I) /FontFile3 64 0 R >> endobj 44 0 obj << /Length 1523 /Filter /FlateDecode >> stream Anatomy of Triticum – Leaf (Family – Graminae): ADVERTISEMENTS: T. S. shows prominent ridges and grooves and reveals the following tissues: Epidermis: 1. %PDF-1.5 %���� LEAF_ANATOMY.pdf. endstream endobj 1044 0 obj <>/Metadata 80 0 R/OCProperties<>/OCGs[1057 0 R]>>/Outlines 152 0 R/PageLayout/SinglePage/Pages 1037 0 R/StructTreeRoot 199 0 R/Type/Catalog>> endobj 1045 0 obj <>/Font<>/Pattern<>/Properties<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 1046 0 obj <>stream File Type PDF Leaf Anatomy Worksheet Answers happening in harmful downloads. A leaf is organized to collect sunlight and turn it, through photosynthesis, into food The leaf has many layers of tissue to allow this to happen: 1. Plant Organs - Stem –Functions Support Conduction Food Storage Protection Propagation Photosynthesis. Leaf anatomy in C 4 plants: Leaves of C 4 plants show two type of cells viz. On top of the leaf is a waxy, non-cellular layer, called the cuticle. Leaves with a �{z����Ц >M�����IN���&4Ia� �/ �]Y��6M��A�]�Wv��;�D��v"���jh���Ne�U_nk������j�)W��׎!���ضA���m�F�����Ԟ���]1. To evaluate effects of LMA and leaf anatomy on CO 2 assimilation, water-use efficiency (WUE) and … Leaf. �C�0I!D9�s��6i6�Z������{���r|+�wQ��wȝn��=㈦�W��8�6i��k�V��,��a��U�:�s�S�˾�������L�/U���^;�Ĥ럑�)�~Ŀ(��/;��)dE/^���]�ם�xw��=�lK=�� ךt Academia.edu is a platform for academics to share research papers. 0000009746 00000 n 0000035199 00000 n [PDF] Leaf anatomy of rubber-tree clones | Semantic Scholar Rubber trees are easily recognizable for being woody, medium to large-sized plants, having a typical deciduous behavior, and especially because they produce latex. Leaf anatomy 89 6.1 Introduction Leaves in the Hypoxidaceae are rosulate and three-ranked, the outer ones reduced to cataphylls. endstream endobj startxref It consists of a flattened portion, called the blade that is attached to the plant by a structure called the petiole. 0000024568 00000 n Academia.edu is a platform for academics to share research papers. hcu7n@�T���d&��>���y�JCOxUrk^���R��y�}��+rBdg���+��1�R./���r��Zq�k?��؟ȏ��#:xS�p�@��T�.��H�"|�ux�}� �=��# ư�)�C�d��M`{���t��v�a�k|�D�������pH�t���ip�i�����M. A comparative study of the leaf anatomy ofthree species of three genera of Goetzeaceae (Henoonia, Goetzea, and Espadaea) revealed a number of characteristics common to all genera, viz. Water and minerals flow into the leaf blade and food flows out of the leaf blade through the petiole. The leaf has many layers of tissue to allow this to happen. 0000003640 00000 n The leaf is the primary photosynthetic organ of the plant. 0000006692 00000 n The petiole is similar to a stem in that it has xylem and phloem. Cuticle– on top of the leaf is a waxy non-cellular layer Prevents water from escaping the leaf H���r�6tz�W�Hg" "7�Q���4M����%A]p1I�U>��~C��E�vk�z ޾�>"qG,�3�8aq*���Q,�NE��:z��'o��>��4�1|�H��U�z[��M��XL,�u��w�}���#�`$��T8H[�$C�sN:�}��^�@A�bQ�����`���X�R�*±���be�=D�ɯ�Zu�P���^��ɍ*6������ (_�"nD�3�� �l�;P��N3�Tn�X�8#q��U � ��hN4�Q��йF0t40T �KE�d�L�0R(�V""":�A�@u0j�T2�X@E�LNpy� �����m��,�찠�D�K�Sہ�|*���n20�ĚOx#�fd``~��x�Ӂ4'���`qV���xV��(ct0 ܙ�� 0000003028 00000 n Different organs in a plant show differences in their internal structure. % Progress . Abstract. The internal tissues of the leaf are covered on the upper surface by the upper epidermis. This consists of a single layer of cells with a thick cuticle and usually contains no chloroplasts except in some aquatic plants. Assign to Class. 0000012080 00000 n Daily email subscriptions and social media profiles are also available if you don't want to check their site every day. 0 It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. 0000007233 00000 n 2 pages. Their morphology and anatomy shows … Mikania … The leaves and stem together form the shoot. The leaf is the primary photosynthetic organ of the plant. 0000005094 00000 n It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. 0000021399 00000 n and Vernonia condensata Baker (Asteraceae) species that have different habits emphasizing their secretory structures. Thus in these plants C 4 pathway occurs. Leaf hydraulic conductance (K leaf) varies widely among species (Brodribb et al., 2005; Sack and Holbrook, 2006; Sack and Scoffoni, 2013).Because the resistances inside and outside the leaf xylem (R ox) also vary widely and are, on average across species, of a similar order of magnitude (Sack and Holbrook, 2006), both vein traits and mesophyll anatomy have potentially strong influences on K leaf. ��X�Y�0MaZϰ�aSKϟ�DX��?cX� ���c�:;�n&���n� ���S���,?���Č��o"Wj�o� ��I��4y$������vr%tn�戰8�1[|Cksφ΍�>�f���쒉�I���ܘ�&{�Q�£���#�f&B��o mesophyll chloroplast and bundle sheath chloroplast i.e. The blade is held away from the stem and sup- ported by the petiole. outer mesophyll cells and inner spongy bundle sheath cells arranged in a circular manner like a necklace thus leaves of C 4 plants contain two types of chloroplast viz. 0000001147 00000 n 0000010666 00000 n 0000024706 00000 n h��X�o�6�W�����!R��"��%Y��:[��ٚcԖ I����w'���i�a� ��Ż��g"R���d,����� It consists of a flattened portion, called the blade that is attached to the plant by a structure called the petiole. H. dinteri (A) and H. angustifolia (B) belonging to section Angustifoliae, as well as H. argentea (C) and H. gerrardii (D) of section Argenteae are similar in having linear leaves with one lateral vein on each side of the midvein close to the edge that is adaxially prominent. 0000042230 00000 n In angiosperms leaves commonly have a pair of structures known as stipules, which are located on each side of the leaf base and may resemble scales, spines, glands, or leaflike … 0000011058 00000 n A leaf is the green, flat lateral outgrowth in plants. P 0000013114 00000 n trailer << /Size 74 /Info 33 0 R /Root 35 0 R /Prev 399591 /ID[<0c3423d64831ce965311b94346548456><0c3423d64831ce965311b94346548456>] >> startxref 0 %%EOF 35 0 obj << /Type /Catalog /Pages 32 0 R /PageLabels 31 0 R >> endobj 72 0 obj << /S 276 /L 408 /Filter /FlateDecode /Length 73 0 R >> stream The blade has many layers that not only help the plant move but also help it store materials and byproducts of photosynthesis. 0000001678 00000 n 0000007008 00000 n 0000004017 00000 n 0000012415 00000 n The leaf is the primary photosynthetic organ of the plant. 0000012867 00000 n ]M��i Anatomy of leaf is the detailed study of internal structure of a leaf, usually revealed by its dissection. The leaf is the primary photosynthetic organ of the plant. anomocytic stomata, sinuous anticlinal epidermal walls, both glandular and uniseriate nonglandular trichomes, crystal sand and druses in the mesophyll (often in the same cell), and intraxylary phloem. It consists of a flattened portion, called the blade, Answer the questions about the passage. a. Epidermis b. Practice. The cuticle prevents water from escaping. Sometimes leaves are divided into two or more sections called leaflets. Plants have cells as the basic unit, cells are organised into tissues and in turn the tissues are organised into organs. The leaf is the primary photosynthetic organ of the plant. This indicates how strong in your memory this concept is . 0000008045 00000 n 0000031904 00000 n Bipinnate leaf anatomy with labels showing alternative usages Leaves of most plants include a flat structure called the blade or lamina, but not all leaves are flat, some are cylindrical. h�bbd``b`�$o �T ���F�$2@, � $��@J�@b% ������Ȳ�b``������g� ��% de Juss.) MEMORY METER. They come in different shapes, sizes, and colors, and are generally dorso-ventrally flattened and thin.They are the main organ responsible for photosynthesis as they contain chlorophyll.. Browse more Topics under Anatomy Of Flowering Plants L7��:�� Sometimes leaves are divided into two or more sections called leaflets. View LEAF_ANATOMY.pdf from BIOLOGY 101 at High School Summer Program. Two epidermal layers are present, one each on upper and lower surfaces. Learn vocabulary, terms, and more with flashcards, games, and other study tools. h�b```��,,��@(� dimorphic chloroplast. 2nd ed. 2. The leaf is the primary photosynthetic organ of the plant. PDF Leaf Anatomy Worksheet Answers past this leaf anatomy worksheet answers, but stop Page 1/3. Leaves are classified into mainly two types based on their structure, dorsiventral, and isobilateral. The outer surface of the leaf has a thin waxy Sometimes leaves are divided into two or more sections called leaflets. ANATOMY OF THE LEAF AND STEM OF GOSSYPIUM ' By IRMA E. WEBBER 2 Collaborator^ Division of Cotton and Other Fiber Crops and Diseases^ Bureau of Plant Industryy United States Department of Agriculture INTRODUCTION Because of the great commercial importance of cotton fibers, their structure at various stages of development has been carefully studied. Leaf Structure and Function. 0000001832 00000 n The foliage leaves are linear or lanceolate and hairy, seldom glabrous. 0000004752 00000 n 3. Leaves are among the most important organs of a plant, and they are ­indicators of the condition of a tree. It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. The outer surface of the leaf has a thin waxy covering called the cuticle (A), this layer's primary function is to prevent water loss within the leaf. 2 pages . Epidermis – The leaf's outer layer and protective "skin" surrounding leaf tissues. But when the tip bud dies or is removed, many axillary buds (in the the angle between each leaf and its parent twig) and dormant buds (in the living wood under the bark) are activated, and the cambium may be stimulated to produce … Since there are books like Gray’s Anatomy out there, it has been really difficult for a new book to create its place among those. leaf anatomy, for the coordination of water status and water flow across scales in plants, and for stomatal regulation, which may be influenced by microscale variations in leaf water potential (Buckley, 2005; Mott, 2007). It consists of a flattened portion, called the blade that is attached to the plant by a structure called the petiole. H�b```f``9������� Ā B@16� '��鶅,B+��}r�I�^`�T��d��G? HW 25 Leaf Structure (1) Hillcrest High School; BIO 101 - Fall 2016. A leaf is organized to collect sunlight and turn it, through photosynthesis, into food. Taken from Nel (1914). Palisade cells are more column-like, and lie just understanding-leaf-anatomy-and-morphology 1/5 PDF Drive - Search and download PDF files for free. 1071 0 obj <>stream Anatomy of the Leaf: Read the following passage about the parts of a leaf. ��*Y�d�:G�>�P�i�2rK K�%��i�h�,p����Đoδ6)pV �Y��=�.��q1���7O��-�{ޖ�fr�m�E �����uY��5}��E���)�݃�m˺z�痓ɸh�9�s���8��x�HX>)�?���c��T��Nu���U�hX����j��͗����)!x �y�^����-�eî�?هͺ�ޒ���o�Ww���u�����^+}��B�˶X-g�j�*��Ӷ\��2�uM1�z�m75��j���B�X3������m��j�?.�Q�,����n��cQ�f����C��/�3QƄ���O%%2�������6c�&)�$I��3p`H|�Nf��t8��Wew>�ڒ=��f���*�e����y�(�,���H�}�G�����(��!���E���8w��=u��P~�ǘ�����h��8_�So'� p'����G���}%���L����(��[j���W���#�2�)���1�2Je �:{��$!1�K��#ѐ�P(4���!jz8>64�½���8�cq�t���x 8 Find these structures on the attached diagram of cellular leaf tissues. Leaves are collectively referred to as foliage, as in "autumn foliage". The purpose of my study was to evaluate whether differences in leaf anatomy and morphology between sensitive and tolerant individuals of coneflower were responsible for this variation in ozone susceptibility. Sometimes leaves are divided into two or more sections called leaflets. Answer the questions about the passage. Rubber trees are easily recognizable for being woody, medium to large-sized plants, having a typical deciduous behavior, and especially because they produce latex. xw!�%ǀ9ziH�%�����b ��*C|��4��Q)���?\^-�� Study of internal structure of plants is called anatomy. 2 pages. Describes how leaves are made of several different kinds of specialized tissues. 0000028777 00000 n 0000002326 00000 n Anatomy Of Monocot Leaf Pdf masuzi April 27, 2020 Uncategorized 0 Primary structure of a monocot leaf anatomy of a dicot leaf sunflower difference between dicot and monocot anatomy of monocot and dicot leaf in Anatomy And Primary Structure Of A Monocot Leaf Grass %PDF-1.3 %���� Create Assignment. Acces PDF Leaf Anatomy Lab Answers Leaf Anatomy Lab Answers The eReader Cafe has listings every day for free Kindle books and a few bargain books. The objective of this paper was to describe and compare the morphology and anatomy of mature leaves of Mikania glomerata Spreng., Porophyllum ruderale Cass. LEAF_ANATOMY_diagram_&_questions.pdf. 1056 0 obj <>/Filter/FlateDecode/ID[<0C7C6A67C8F395489F1DED35EE0786DF>]/Index[1043 29]/Info 1042 0 R/Length 74/Prev 811402/Root 1044 0 R/Size 1072/Type/XRef/W[1 2 1]>>stream [7�u�۽�_k��f&_ln�zS��v����$�3[[%���y9S�P���|� Q�E�D��L�K\z\p{\��|�'?��ܞ&" Stomata are also usually absent or few except in special cases. 0000001222 00000 n Write the letter of the term by the defini-tion. Preview; Assign Practice; Preview. 0000013047 00000 n Within the leaf, there is a layer of cells called the mesophyll. Plant Anatomy Organs –Flower ... Plant Organs - Leaf Functions Photosynthesis Regulate water loss Storage Support Protection Attraction Propagation Types –Simple Blade of the leaf occurs as one unit –Compound Blade of the leaf is divided into individual leaflets. E-unit: Leaf Anatomy and Morphology Page 3 www.MyCAERT.com The leaf is the primary photosynthetic organ of the plant. Color the cross section of the leaf. �B��S�=����h���������KEGG��4��fKG��l&u�A���д4��T��(�oe�W�X,��� Match the term with the correct response. ��XBRt���IN���y���B�6�仓z}��h������EU��,8-����l�mQ�ߊ�l�g��$��籩�e�v%�Ȼ#x�I(p3�T��� �9J�%��M��m�y�P]տ�0Ɓ �~>�����?4�e0q�fO� �Lǎi�� D��Ɔ� Pr��UK��4S��l�:u�����ט��H v.1. Human Anatomy and Physiology Pdf Review: Over the years, there have been many textbooks which have been released by several authors on the subject of human anatomy. Progress % Practice Now. Start studying Leaf Anatomy Worksheet. Understanding Leaf Anatomy And Morphology understanding leaf anatomy and morphology Understanding Leaf Anatomy and Morphology ent kinds of compound leaves Two common types are the palmately compound leaf and the pinnately compound leaf A palmately compound leaf has all its … Leaf mass per unit area (LMA) and internal leaf anatomy often affect net gas exchange because of their effects on internal CO 2 conductance to the site of carboxylation, internal shading, competition for CO 2 among carboxylation sites, nitrogen concentration and its partitioning. 0000001657 00000 n Leaf morphology Typically, a leaf consists of a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. 34 0 obj << /Linearized 1 /O 36 /H [ 1222 456 ] /L 400399 /E 254878 /N 6 /T 399601 >> endobj xref 34 40 0000000016 00000 n I hypothesized that sensitive individuals would have thinner leaf … Sometimes leaves are divided into two or more sections called leaflets. The leaf is the site of photosynthesis in plants. Leaves with a single undivided blade are called simple, those with two or more leaflets are called compound. 0000010840 00000 n 0000009818 00000 n The single dominant vein in the middle of the blade. Lesson A2–4: Understanding Leaf Anatomy and Morphology Part One: Matching Instructions. Uniseriate upper and lower epidermal layers are composed of more or less oval cells. Leaf Anatomy.docx; Rocky Mountain High School; BIO 30 - Spring 2019. The main light-collecting structure on a leaf is a large, broad, flat surface called the leaf blade. Leaf Anatomy.docx. The leaf blade is connected to the stem by the petiole, which is the lifeline between the leaf and the rest of the plant. These structures on the upper epidermis e-unit: leaf anatomy and Morphology part one: Instructions. And hairy, seldom glabrous or lanceolate and hairy, seldom glabrous a leaf. A large, broad, flat lateral outgrowth in plants leaf '' ( phyllon ) happening. 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