The elements of botany for beginners and for schools . y rounder andbroader than long. Auriculate, or Bared,having a pair of small125 126 127 and blunt projections, or ears, at the base, as in one species of Magnolia (Fig. 126). Sagittate, marrow-shaped,where such ears are acuteand turned downwards,while the main body of theblade tapers upwards to apoint, as in the commonSagittaria or Arrow-head,and in the Arrow-leavedPolygonum (Fig. 125).Hastate, or Halberd-shaped,when such lobes at the basepoint outwards, giving theshape of the halberd of theolden time, as in anotherPolygonum (Fig. 127). Pel
The elements of botany for beginners and for schools . y rounder andbroader than long. Auriculate, or Bared,having a pair of small125 126 127 and blunt projections, or ears, at the base, as in one species of Magnolia (Fig. 126). Sagittate, marrow-shaped,where such ears are acuteand turned downwards,while the main body of theblade tapers upwards to apoint, as in the commonSagittaria or Arrow-head,and in the Arrow-leavedPolygonum (Fig. 125).Hastate, or Halberd-shaped,when such lobes at the basepoint outwards, giving theshape of the halberd of theolden time, as in anotherPolygonum (Fig. 127). Peltate, or Shield-shaped (Fig. 132), is the name applied to a curiousmodification of the leaf, commonly of a rounded form, where the footstalkis attached to the lower surface, instead of the base, and therefore is natu- Fio. 121, oblanceolate; 122, spatnlate ; 123, obovate ; and 124, wedge-shaped,feather-veined, 125, sagittate ; 126, auriculate ; and 127, halberd-shaped or hastate 12S-132. Various forms of radiate-veined 64 LEAVES. [SECTION 7. rally likened to a shield borne by the outstretched arm. The commonWatershield, the Nelumbium, and the White Water-lily, and also the Man-drake, exhibit this sort of leaf. On comparing the shield-shaped leaf ofthe common Marsh Pennywort (Fig. 132) with that of another commonspecies (Fig. 130), it is at once seen that a shield-shaped leaf is like akiduey-shaped (Fig. 130, 131) or other rounded leaf, with the margins atthe base brought together and united. 137. As to the Apex, the following terms express the principal yaria-tions: — Acuminate, Pointed, or Taper-pointed, when the summit is more or lessprolonged into a narrowed or tapering point; as in Fig. 133. Acute, ending in an acute angle or not prolonged point; Fig. 134. Obtuse, with a blunt or rounded apex ; as in Fig. 135, etc. Truncate, with the end as if cut off square; as in Fig. 136. Refuse, with rounded summit slightly indented, forming a very sha
Size: 1735px × 1440px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
