The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . ts apex, it becomes ligulate, or strap-shaped (fig. 211). 134 B O T ANY [kepbouvctivi; oitoAwa. This corolla occurs in many Composite plants, as iii tlieflorets of Daiidiilioii, Daisy, and Chicory. The uumber ofdivisions at the apex indicates the number of united petals,some of which, however, may be abortive. Occasionallysome of the p^etals become more united than others, andthen the corolla assumes a bilabiate, or two-lipped form,as seen in the division of Compositse called Labiatifloras. In Grasses and
The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . ts apex, it becomes ligulate, or strap-shaped (fig. 211). 134 B O T ANY [kepbouvctivi; oitoAwa. This corolla occurs in many Composite plants, as iii tlieflorets of Daiidiilioii, Daisy, and Chicory. The uumber ofdivisions at the apex indicates the number of united petals,some of which, however, may be abortive. Occasionallysome of the p^etals become more united than others, andthen the corolla assumes a bilabiate, or two-lipped form,as seen in the division of Compositse called Labiatifloras. In Grasses and Sedges, in place of verticillato leavesforming tlio flower, there are alternate scales or flowers of Grasses usually occur in spikelets (fig. 212),which consist of one or two glumes a, covering severalfi >wer3 b. The spikelets are associated in spikes orpanicles. In Wheat these spikelets are arranged alternatelyalong a common Each spikelet consists of twoempty glumes a, a, having the foim represented in , and enclosing flowers composed of scales (joalece. Fig. 212. Fig. 213. Fig. 214. FlO. 212.—A Bplkclct of Wlicat (7^-i(icu»n). consisting of two glumes a, a. enclosingpeveral flowers b,b, which are conijiosetl of two pales (pnleeej covering tlit;essential, organs of reproduction. The etuinens i hang out by long, slender,threadHke filaments. The individual glumes and pales are placed alternatelyon the floral a:ii3. tlG. 213.—Flower of Oat {Avena sunia), with the two-glumes, and the outerglumella or palea removed. The inner glumella, flowering glume, or paica seen, of a hinceohito form, and bidentate Ht the apex. By removing the outerglumella there are seen two scales (lodiculK, squama) sq. with the threeBtnmens und two feathery styles. FiQ 214.—Plstiilifeiousor pistillate flower of a Sedge {Carex) with a single glumeor scale «. The pistil is covered liy an urceolate glumaceous bag o, calledperlgynlum. There Is one style st, with three
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
