. Fundamentals of botany. Botany. 488 STRUCTURE AND LIFE HISTORIES thus protected from becoming pollinated with the flower's own pollen. Asjhe styles emerge above the anthers their two tips spread apart and roll back, exposing the infacing. Fig. 373.—A composite {Coreopsis Sp.). A, B, E, views of the inflor- escence or head; C, a ray-flower; D, section through the head; F, a disc- flower in bud; G, disc-flower just opened; H, older disc-flower, the stigmas reflexed; /, disc-flower with corolla removed. stigmatic surfaces so that they may receive pollen brought by insects from other flowers (Fi
. Fundamentals of botany. Botany. 488 STRUCTURE AND LIFE HISTORIES thus protected from becoming pollinated with the flower's own pollen. Asjhe styles emerge above the anthers their two tips spread apart and roll back, exposing the infacing. Fig. 373.—A composite {Coreopsis Sp.). A, B, E, views of the inflor- escence or head; C, a ray-flower; D, section through the head; F, a disc- flower in bud; G, disc-flower just opened; H, older disc-flower, the stigmas reflexed; /, disc-flower with corolla removed. stigmatic surfaces so that they may receive pollen brought by insects from other flowers (Fig. 373).^ ^ The family Compositae, as recognized above, including two series, Tubuliflorae and Liguliflorae, is restricted by some authors so as to include only plants having florets with tubular or both tubular and ligulate cor- ollas in the head. Such plants as the chicory, dandelion, and lettuce, having only ligulate corollas, comprise the family Cichoriaceae. Cichor- iaceas and Compositas (in this restricted sense) have syngenesious anthers. Plants whose florets have tubular corollas only (sometimes none), but anthers not truly syngenesious, comprise the Ambrosiaseae, including the rag-weeds, cockle-bur, marsh-elder (/no), and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany
