. Key and flora : northern and central states . Botany. MILKWEED FAMILY 195 hood-like appendages, each with an incurved horn borne on the stamen tube and forming a crown around the stigma (Fig. 27, A); anthers pressing against the lobes of the stigma; the pollen clinging together , waxy or fine-grained hn --^='~ -«. Fig. 27. Flower of Asdepias syriaca A, entire flower; B, vertical section; C, diagram; D, details of poUen-masses and glands, ca, calyx; c, corolla; hd, hood; hn, horn; a, anther; s, stig- ma ; 0, ovary; g, gland; p, pollen-mass. (All considerably enlarged.) masses. Ovary f
. Key and flora : northern and central states . Botany. MILKWEED FAMILY 195 hood-like appendages, each with an incurved horn borne on the stamen tube and forming a crown around the stigma (Fig. 27, A); anthers pressing against the lobes of the stigma; the pollen clinging together , waxy or fine-grained hn --^='~ -«. Fig. 27. Flower of Asdepias syriaca A, entire flower; B, vertical section; C, diagram; D, details of poUen-masses and glands, ca, calyx; c, corolla; hd, hood; hn, horn; a, anther; s, stig- ma ; 0, ovary; g, gland; p, pollen-mass. (All considerably enlarged.) masses. Ovary free from the calyx tube, of 2 carpels, more or less united below but unconnected above; styles 2; stigmas 6-angled; ovules several-many. Fruit consisting of 1 or 2 pods. The flowers are very highly specialized for pollination by insects (see below, under Asdepias).. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston : Ginn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908
