. A textbook of botany for colleges and universities ... Botany. Figs. 288-293. — Embryo (sporophyte) of Lyco- podiwm clavatum: 288, first division of egg into sus- pensor cell and embryonal cell; 289, 290, division of embryonal cell into four cells (290 being a cross sec- tion); 291-293, further stages in the development of the embryo. —-After Fig. 294. — Young sporophyte of Lycopo- diwm clavatum^ show- ing foot, primary root, and stem bearing scale leaves. — After Bruchmann. embryo sporophyte, found in certain pteridophytes, as the Lycopo- diales, but very characteristic of seed
. A textbook of botany for colleges and universities ... Botany. Figs. 288-293. — Embryo (sporophyte) of Lyco- podiwm clavatum: 288, first division of egg into sus- pensor cell and embryonal cell; 289, 290, division of embryonal cell into four cells (290 being a cross sec- tion); 291-293, further stages in the development of the embryo. —-After Fig. 294. — Young sporophyte of Lycopo- diwm clavatum^ show- ing foot, primary root, and stem bearing scale leaves. — After Bruchmann. embryo sporophyte, found in certain pteridophytes, as the Lycopo- diales, but very characteristic of seed plants Phylloglossum This is an Australasian genus of one species, closely allied to Lycv- podittm and thought by some to be the most primitive pteridophyte. The sporophyte body is a tuberous stem bearing a cluster of small leaves. Some of the sporophytes also develop a short, naked stalk bearing a terminal stobilus (fig. 295). Some species of Lycopodium begin with this type of body, but the strobilus-bearing stalk becomes branching and leafy, and the tuberous embryonic body disappears. The adult body of Phylloglossum, therefore, is like the embryonic body of some species of Lycopodium. In other species of Lycopodium this kind of embryonic body is absent from the life history. The gameto- phyte resembles that of Lycopodium, in which there is a subterranean. 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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