Das Pflanzenreich Volume 110; Regni Vegetabilis Conspectus. Im Auftrag Der K. Preussische Akademie Der Wissenschaften Herausgegeben.cAdolf Engler
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...to be dry in themselves. The pistil consists of 5 (Darlingtonia and Sarracenia) or of 3 (Heliamphora) united carpels, that grow inward to form a 5--3-celled ovary. The numerous anatropous ovules in Sarracenia are arranged in five longitudinal rows along the thickened V recurved placental margins (Fig. 6 E). Each ovule undergoes typical angiospermir development, up to the time of pollination. In Hcliamphora the conical ovarian wall (Fig. 2 D) is covered with bifurcated hairs and with honey glands, like those of Hie pitcher exterior. In Sarraccnia as above noted, the entire ovarian surface is covered with multicellular tubercular crystalline swellings (Fig. 5F) that begin to exude nectar as the flower opens. The excretion may go on more or less interruptedly, if pollination is not effected, for 10--20 days, by which time the petals and stamens will have fallen. But it may even exude for 5--8 days after the deciduous flower parts have fallen. The style is a cylindrical pillar in its lower part, that is traversed centralis by a canal, down which the pollen tubes pass. Higher up it expands greatly in umbrelloi, l fashion to form a large cavity, which, from the inclined position of the flower, rcccive the abundant pollen that falls from the stamens above (Fig 6 5). Its outer surfaces may be more or less hair-covered, and ahundanth provided with stomata. The latter structural detail is in keeping with the green persistent condition shown in the fruiting state. The small projecting stigmatic knobs (Fig. 6 B n) bear abundant but minute stigmatic hairs, and from the stigmas loose conducting cells pass into the style veins. In Darlingtonia the turbinate ovary of the pistil (Fig. 7 A) is closely covered with shallow crystalline tubercles, that histologically resemble th..
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