. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. FOKM OR FIGl HK. m orbicular in figure- and larger than any other, presenting the form of the ancient lyre, the form is termed Featbcr-vetiied leaves almost compound. 14S, Nlfcelk (pinnaHsf^ct). 144, Clelidonium ma- jus. 145, Thistle (Cirsium lanceolatuni). 146, Dandelion (runcinate-lyrate). 270. PiNNATELY PARTE ) iiupHes that the incisions are deeper th
. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. FOKM OR FIGl HK. m orbicular in figure- and larger than any other, presenting the form of the ancient lyre, the form is termed Featbcr-vetiied leaves almost compound. 14S, Nlfcelk (pinnaHsf^ct). 144, Clelidonium ma- jus. 145, Thistle (Cirsium lanceolatuni). 146, Dandelion (runcinate-lyrate). 270. PiNNATELY PARTE ) iiupHes that the incisions are deeper than piutmtifid, nearly reaching the midvein. In either case the leaf is said to be sinuate when the incisions (sinuses) as well as the segments are rounded and flowing in outline. Such segments are lobes, and the leaves lobate or lobed, a very generic term. ^' . The palmate venation presents us with a set of forms which - "f, a general, broader in proportion than the pinnate, having the breadth about equaling the length. Such a leaf may be rarely broadly ovate or broadly cordate^ terms which require no further explanation. Or it may be Reniform, kidney-shaped, having a flowing outline broader than long, concave at base ; or Peltate, shield-form, the petiole not inserted at the margin but â the midst of the lower surface of the blade. This singular form evi jtly results from the blending of the base lobes of a deeply cordate leaf, as seen in hydrocotyle. It may be orbicular, oval, etc. 27'2. Palmate forms. The following result from deficiency of tis- sue, causing deep divisions between the veins. Leaves thus dissected arc said to be pabnately-lobed when either the segments or the sinuses are somewhat rounded and continuous. The nuinber of lobes is de- noted by such terms as bilobate, triloba le, five-lobed, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these ill
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
