. Annual report of the Board of Regents of the Smithsonian Institution . Fig. 7.—Opuntia flower. Fig. 8.—Flower of Cereus. which has been named Rotatiflorce^ they are widely spreading andwheel shaped, as in the genus Opuntia; in the other division, Tubuli-florcB^ to which Cereus belongs, the floral leaves form a tube, oftenremarkably long and slender, crowned with a spreading limb. Thefloral leaves are not arranged in definite series, but form a spiralin which the scale-like lower bracts gradually assume a sepal-likeappearance and at length become broad and petaloid. In all casesthe perianth c
. Annual report of the Board of Regents of the Smithsonian Institution . Fig. 7.—Opuntia flower. Fig. 8.—Flower of Cereus. which has been named Rotatiflorce^ they are widely spreading andwheel shaped, as in the genus Opuntia; in the other division, Tubuli-florcB^ to which Cereus belongs, the floral leaves form a tube, oftenremarkably long and slender, crowned with a spreading limb. Thefloral leaves are not arranged in definite series, but form a spiralin which the scale-like lower bracts gradually assume a sepal-likeappearance and at length become broad and petaloid. In all casesthe perianth crowns the ovary, and often after withering it persistsas a crown to the fruit. The stamens are numerous and are insertedon the petals or perianth tube. The style is more robust and longerthan the filaments. It usually expands at the summit and bears astigma divided into several or many rays. Sometimes the stigma isbrightly colored and looks like a star issuing from the dense clusterof anthers, adding no little to the beauty of the flower. This isespecially the cas
Size: 1255px × 1991px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
