. The botanical class-book, and flora of Pennsylvania, designed for seminaries of learning and private classes. t£». 166. The Umbel (Fig. 78,) only differs from a corymb 56 INFLORESCENCE. in having all the pedicels arising from the same point, andare mostly equal in length, as in the Asclepias, Cowslip,Primrose, and the Umbelliferse generally. 167. A Head (or Capitulum, Fig. 79,) is the same as annmbel with the pedicels all shortened, so as to bring theflowers all into a close rounded head; as in the Clover, Button-bush, Teasel. The axis or rachis of a head is called the receptacle. Fre-quentl
. The botanical class-book, and flora of Pennsylvania, designed for seminaries of learning and private classes. t£». 166. The Umbel (Fig. 78,) only differs from a corymb 56 INFLORESCENCE. in having all the pedicels arising from the same point, andare mostly equal in length, as in the Asclepias, Cowslip,Primrose, and the Umbelliferse generally. 167. A Head (or Capitulum, Fig. 79,) is the same as annmbel with the pedicels all shortened, so as to bring theflowers all into a close rounded head; as in the Clover, Button-bush, Teasel. The axis or rachis of a head is called the receptacle. Fre-quently, instead of being at all prolongated, it is flat and dila-ted longitudinally, so as to allow a large number of flowersto stand on its level surface, as in the Sunflower, and th*Composite (compound flowers) generally.
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
