. The elements of botany for beginners and for schools. Botany. SECTION 7.] ORDINARY LEAVES. 55. 142 113 144 145 140 147 Entire, whea their general outline is completely filled out, so that the margin is an even line, without teeth or notches. Serrate, or Saw-toothed, when the margin only is cut into sharp teeth, like those of a saw, and pointing forwards: as in Fig. 142. Dentate, or Toothed, A when such teeth point outwards, instead of forwards ; as in Fig, 143. Crenate, or Seal- j loped, when the teeth j are broad and round- i ^ ed ; as in Fig. 144. ^ - Repand, Undulate, \ or Wavy, when the
. The elements of botany for beginners and for schools. Botany. SECTION 7.] ORDINARY LEAVES. 55. 142 113 144 145 140 147 Entire, whea their general outline is completely filled out, so that the margin is an even line, without teeth or notches. Serrate, or Saw-toothed, when the margin only is cut into sharp teeth, like those of a saw, and pointing forwards: as in Fig. 142. Dentate, or Toothed, A when such teeth point outwards, instead of forwards ; as in Fig, 143. Crenate, or Seal- j loped, when the teeth j are broad and round- i ^ ed ; as in Fig. 144. ^ - Repand, Undulate, \ or Wavy, when the \ margin of the leaf forms a wavy line, bending slightly in- wards and outwards in succession; as in Fig. 145. Sinuate, when the margin is more strongly sinuous or turned inwards and OTitwards ; as in Fig. 146. Incised, Cut, or Jagged, when the margin is cut into sharp, deep, and irregular teeth or incisions; as in Fig. 147. Lobed, when deeply cut. Then the pieces arc in a general way called Lobes. The number of the lobes is briefly expressed by the phrase two- lobed, three-lobed, Jice-lobed, manj/-lobed, etc., as the case may be. 140. When the depth and character of the lol)!ng needs to be more par- ticularly specified, the following terms are employed, viz.: — Lobed, in a special sense, when the incisions do not extend deeper than about half-way between the margin and the centre of tlie blade, if so far, and are more or less rounded; as in the leaves of the Post-Oak, Fig. 148, and the Hepatica, Fig. 152. Cleft, when the incisions extend half way down or more, and especially ^hen they are sharp; as in Fig. 149, 153. And the phrases two-cleft, or, in the L'ltin form, bijid, three-cleft or trifid, four-cleft or quadrifid, five- cleft or fini/iquefid, etc., or mang-cleft, in tlie Latin form, midtifid,— express the number of the Segments, or portions. Parted, when the incisions are still deeper, but yet do not quite reacli to the midrib or the base of the blade; as in Fig. 150
Size: 1947px × 1283px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
