The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . hingle Oak. 387,Lobed leaf of Chrysanthemum. 310. The undidate, or wavj^ edge, is somewhat different fromthe repand, which bends like the margin of an umbrella. If theA^eins project, and are tipped with spines, the leaf becomesspinous. Irregularly divided margins are said to be erose orjagged, laciniate or torn, incised or cut. Often, instead of adefici
The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . hingle Oak. 387,Lobed leaf of Chrysanthemum. 310. The undidate, or wavj^ edge, is somewhat different fromthe repand, which bends like the margin of an umbrella. If theA^eins project, and are tipped with spines, the leaf becomesspinous. Irregularly divided margins are said to be erose orjagged, laciniate or torn, incised or cut. Often, instead of adeficiency, there is a superabundance of marginal tissue, de-denoted by the term crispate or crisped. 311. Insertion. Several important terms descriptive of thevarious modes of leaf-insertion must here be noticed. A sessileleaf is said to be amplexicaul when its base lobes adhere to and THE COMPOUND LEAF. 105 c clasp the stem. Should these lobes extend quite around thestem and become blended together, on the other side a perfoliateleaf will be formed (^er, through, folium^ leaf), the stem seem-ing to pass through the leaves. When the bases of two oppositesessile leaves are so united as to form one piece of the two, theyare said to be J/wertiono/Jeaues.—388, Aster laevis (amplexicaul). 389, Uvularia perfoliata. 390, Lonicera semper- virens (connate). 312. Surface. The following terms are applicable to anyother organs as well as leaves. In the quality of surface theleaf may be glabrous (smooth), destitute of all hairs, bristles,etc., or scabrous (rough), with minute, hard points, hardly visi-ble. A dense coat of hairs will render the leaf pubescent whenthe hairs are soft and short; villous when they are rather longand weak; sericeous^ or silky, when close and satin-like: sucha coat may also be lanuginous^ woolly; tomentous^ matted likefelt; or Jloccose, in soft, fleecy tufts. 313. Thinly scattered hairs render the surface hirsute whenthey are long ; pilous when short and so
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
