. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. PLANT D-EVELOPMENT CONTINUED. 47 monceclous, and in cones on branching stems nearly a foot in length ; the cones ripen into a fine crimson color. The male cones are half an inch long ; the female two to three Fig. 49.— Welwitschia mirahilis. Plant entire, with a branch of fertile cones removed from the rim. 80. Thus far, throughout both Cryptogamia and Gym- nosperms, the male and female flowers are diclinous, and dioecious or monoecious. The Welwitschia flowers ar
. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. PLANT D-EVELOPMENT CONTINUED. 47 monceclous, and in cones on branching stems nearly a foot in length ; the cones ripen into a fine crimson color. The male cones are half an inch long ; the female two to three Fig. 49.— Welwitschia mirahilis. Plant entire, with a branch of fertile cones removed from the rim. 80. Thus far, throughout both Cryptogamia and Gym- nosperms, the male and female flowers are diclinous, and dioecious or monoecious. The Welwitschia flowers are mo- noecious ; but the male flower shows a curious prophecy— or is it a degradation ?—of the monoelinous flower which is found only among Angiosperms. The male flower (Fig. 50, A, B) has an involucre of four bracts, in two whorls, two bracts in each whorl ; six stamens with filaments united below into a tube. This tube sur- rounds an ovule, of which the testa is pro-. 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 Ketchum, Annie Chambers, 1824-1904. Philadelphia, J. B. Lippincott company
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisher, booksubjectbotany
