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 . 294. Pinnately parted implies that the incisions are deeperthan pinnatifid, nearly reaching the mid vein. In either case theleaf is said to be si7iuate when the incisions (sinuses) as well asthe segments are rounded and flowing in outline. Such segmentsare lobes, and the leaves lohate or lobed, a very generic term. 295. Palmate forms. The palmate venati
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 . 294. Pinnately parted implies that the incisions are deeperthan pinnatifid, nearly reaching the mid vein. In either case theleaf is said to be si7iuate when the incisions (sinuses) as well asthe segments are rounded and flowing in outline. Such segmentsare lobes, and the leaves lohate or lobed, a very generic term. 295. Palmate forms. The palmate venation presents uswith a set of forms which are, in general, broader in proportionthan the pinnate, having the breadth about equal to the a leaf may be rarely broadly ovate, or broadly cordate,terms which require no further explanation. Or it may beJReniform, kidney-shaped, having a flowing outline broader thanlong, concave at base; or Peltate, shield-form, the petiole notinserted at the margin, but in the midst of the lower surface ofthe blade. This singular form evidently results from the blend- MORPHOLOGY OF THE LEAF. 99 ing of the base lobes of a deeply cordate leaf, as seen in hydro-cotyle. It may be orbicular, oval, Feather-veined leaves almoxt compound.—Si\ Nigella (pirinatisect). 344, (^heledonium majus. 345, This-tle (Cirsium lanceolatum). 346, Dandelion (runcinate-lyrate). 296. The following result from deficiency of tissue, causingdeep divisions between the veins. Leaves thus dissected aresaid to be pahnately-lohecl when either the segments or the si-
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
