. A textbook of botany for colleges and universities ... Botany. I go MORPHOLOGY Conclusions. —The characters presented by this group are a com- bination of the characters of Cycadofilicales, of Cycadales, and of char- acters peculiar to itself. In lateral branches, ramentum, direct leaf traces, and synangia, it resembles Cycadofilicales and Filicales. In general habit and anatomy it re- sembles Cycadales. In its bisporangiate strobilus, its united and pinnate and synangium-bearing stamens, its mix- ture of sterile and fertile megaspo- rophylls bearing terminal ovules, and its peculiar embryo,
. A textbook of botany for colleges and universities ... Botany. I go MORPHOLOGY Conclusions. —The characters presented by this group are a com- bination of the characters of Cycadofilicales, of Cycadales, and of char- acters peculiar to itself. In lateral branches, ramentum, direct leaf traces, and synangia, it resembles Cycadofilicales and Filicales. In general habit and anatomy it re- sembles Cycadales. In its bisporangiate strobilus, its united and pinnate and synangium-bearing stamens, its mix- ture of sterile and fertile megaspo- rophylls bearing terminal ovules, and its peculiar embryo, it is unlike any other gymno- sperm group. ^^R> (3) Cycadales General character. — The cycads are tropical plants, in- cluding almost one hundred species, constituting nine genera. They are distributed almost equally between the oriental and oc- cidental tropics, Cycas being the conspicuous orien- tal genus, and Zamia the conspicuous occidental one. The cycads are the modern li\nng representatives of the line that began with the Cycadofilicales of the Paleozoic, and was continued by the Bennet- titales of the ! Fig. 433. — Cycas media (middle and right) and C. Xormuti- byana (left), from oriental tropics. — After F. von 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 Coulter, John Merle, 1851-1928; Barnes, Charles Reid, 1858-1910, joint author; Cowles, Henry Chandler, 1869- joint author. New York, Cincinnati [etc] American book company
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