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By Smithsonian Leaf Architecture Group

Sixty seven pages.

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Additional resources for Manual of Leaf Architecture: Morphological Description and Categorization of Dicotyledonous and Net-Veined Monocotyledonous Angiosperms

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3 teeth incomplete loops - freely ending veinlets adjacent to the margin. Fig. 4 no teeth looped - marginal ultimate vein recurved to form loops. leaf margin leaf margin fimbrial vein fimbrial vein Pycnocoma littoralis (Euphorbiaceae) Cissampelos ciliafolia (Menispermaceae) Fig. 5 teeth Fig. 6 no teeth fimbrial vein - higher vein orders fused into a vein running just inside the margin. - 44 - 46. LEAF RANK Leaf rank is a semiquantitative description of the regularity of the leaf’s vein system, from an arbitrary level of 1r for the lowest rank or level of organization to 4r for the highest.

44 - 46. LEAF RANK Leaf rank is a semiquantitative description of the regularity of the leaf’s vein system, from an arbitrary level of 1r for the lowest rank or level of organization to 4r for the highest. The rank number corresponds to the highest order of veins that is well organized. The table on the next page gives the characters that define the ranks. 1r 2r ~3X ~3X 2° 2° 1° ~7X ~1X ~7 X ~1X Schisandra glaucescens (Schisandraceae) Polyscias guilfoylei (Araliaceae) Fig. 1 Fig. 2 3r 4r ~3X ~3X 2° 2° ~7X ~7X ~1X ~1X Toona sureni (Meliaceae) Fagus tientaiensis (Fagaceae) Fig.

3 convex - middle portion of the vein curving away from the center of the leaf. sinuous - changing direction of curvature. ramified - tertiary veins branch into higher orders without rejoining secondaries. Sadrinelia gilletii (Anacardiaceae) Ascarina rubricaulis (Chloranthaceae) Fig. 4 Fig. 5 admedially ramified - branching oriented toward the primary or midline. - 37 - exmedially ramified - branching oriented toward the leaf margin. 37. 3° (VEIN) ANGLE TO 1° 1° 3° 2° Tristemma incompletum (Melastomataceae) 1° Croton urucurana (Euphorbiaceae) Fig.

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