By Smithsonian Leaf Architecture Group
Sixty seven pages.
Read Online or Download Manual of Leaf Architecture: Morphological Description and Categorization of Dicotyledonous and Net-Veined Monocotyledonous Angiosperms PDF
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Extra info for Manual of Leaf Architecture: Morphological Description and Categorization of Dicotyledonous and Net-Veined Monocotyledonous Angiosperms
3 irregular Apeiba tibourbou (Tilliaceae) decreasing toward base Fig. 4 - 33 - increasing toward base 33. 2° VEIN ANGLE Vitex limonifolia (Verbenaceae) Cola nitida (Sterculiaceae) Fig. 1 Fig. 2 Fig. 3 uniform one pair acute basal secondaries two pair acute basal secondaries Pseudolmedia laevis (Moraceae) Popowia congensis (Annonaceae) Leea sambucina (Leeaceae) Bridelia mollis (Euphorbiaceae) Fig. 4 Fig. 5 Fig. 6 smoothly increasing toward base smoothly decreasing toward base abruptly increasing toward base - 34 - 34.
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 Fig. 4 - 45 - Elements 1r 2r 3r 4r 1o course regular, rarely irregular regular regular regular 2o vein course angle of origin spacing irregular irreg.
Acrodromous - two or more secondaries running in convergent arches toward the leaf apex. Leuconotis eugeniafolia (Apocynaceae) Acer flabellatum var. yunnanensis (Aceraceae) Fig. 10 Fig. 13 intramarginal vein secondaries end in a strong vein closely paralleling the leaf margin. interior - 2° crossing between primary veins or 2° veins that do not reach the margin typically arched or straight. Omphalopus sp. (Melastomataceae) Miconia brenesii (Melastomataceae) basal suprabasal Fig. 11 Fig. 12 - 31 - 30.