Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . FIG. 369. Dicentra Cucullaria (Dutchmans-Breeches), with its kind of bulb, a leaf, and ascape in flower; reduced in size. 370. A flower of the natural size. 371. The same, with theparts separated, except the sepals, one of which is seen at the base of the pistil. 372. Theinner pair of petals, with their tips coherent. FIG. 373. Diagram (cross-section) of the similar flower of Adlumia. 374. One of the sta-mens increased
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . FIG. 369. Dicentra Cucullaria (Dutchmans-Breeches), with its kind of bulb, a leaf, and ascape in flower; reduced in size. 370. A flower of the natural size. 371. The same, with theparts separated, except the sepals, one of which is seen at the base of the pistil. 372. Theinner pair of petals, with their tips coherent. FIG. 373. Diagram (cross-section) of the similar flower of Adlumia. 374. One of the sta-mens increased into three by chorisis (the lower part of the common filament is cut away). CHORISIS OR DEDUPLICATION. 245. next within, the lateral and exterior petals; those alternate andwithin these, the inner circle of petals; and alternate with these arethe anthers of the two stamen-clusters. The centre is occupied bya section of the pistil, which consists of two united. The three sta-mens are lightly connected in Dicentra (Fig. 371) ; but in Corydalisand Adlumia there is only one strap-shaped filament on each side,which is three-forked at the tip, each fork bearing an anther (). We have a similar case in some Hypericums and in Elodea(Fig. 375), except that, while the floral envelopes are in fives, thecircles within them are commonly inthrees. The three members of theandroecium are normally placed, alter-nating with the three members of thegynreciuni within, and also with threeglands, which probably replace anothercircle of stamens. Now each realstamen is here multiplied into three,united below ; so that the Avhole compound body may be viewed ashomologous with a compound trifoliolate leaf (289)
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
