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 . n and curvature of theveins. When the veins are straight, themost common form is the Linear^ longand narrow, w^ith parallel margins, likethe leaves of the Grasses—a form whichmay also occur in the pinnate-veinedleaf, when the veinlets are all equallyshortened. The ensiform^ or sword-shaped, is also linear, but has its edgesvertical, that is, directed up
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 . n and curvature of theveins. When the veins are straight, themost common form is the Linear^ longand narrow, w^ith parallel margins, likethe leaves of the Grasses—a form whichmay also occur in the pinnate-veinedleaf, when the veinlets are all equallyshortened. The ensiform^ or sword-shaped, is also linear, but has its edgesvertical, that is, directed upward anddownward. 298. If the veins curve, we may havethe lanceolate^ elliptical^ or even orbicu-lar forms ; and if the lower curve down-ward, the cordate^ sagittate^ etc. Pal-mate forms there also are, splendidlydeveloped in the Palmetto and otherPalms, whose large leaves are appropri-ately cdiW^diflahelliform (fan-shaped). 299. The leaves of the Pine and the Fir tribe (Coniferse) gen-erally are parallel-veined also, and remarkable for their con-tracted forms, in which there is no distinction of petiole or are the Acerose (needle-shaped) leaves of the Pine, theSubidate (awl-shaped) and scale-form leaves of the Cedars, 351, Ensiform leaves of Iris. 352,Acerose leaves of Piims. 353, Subu-late leaves of Juiiiperus communis. Review.—^1. Account for the leafs figure. What the principle of our classification?288. Of feather-veined forms, define the first class. Defijae each special form. 289. Thesecond class. Each special form. 290. The third class. Define an obovate leaf—An ob-lanceolate—A spatulate—A cuneate. 291. Define the fourth class. Distinguish four spe-cial forms. Apply the proper term to each figure (311-319). 292. On what do the pinna-tifid forms depend ? Describe the pinnatifid leaf—The runcinate—The lyrate. 294. Whatis pinnately-parted ?—Sinuate ? 295. What forms may a palmi-veined leaf take ? Definereniform—Peltate. Observe (fig. 317-
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
