. A textbook of botany for colleges and universities ... Botany. 172 MORPHOLOGY which becomes hard at maturity, forming a small nuiUke body called the sporocarp (fig. 396). In Salviniaceae, therefore, the sporocarp is a sorus invested by an indusium. Microsporangia and megasporangia. 400 399 Figs. 399, 400. — Azolla: 399, young sporocarp, showing a young megasporangium and the developing indiasium; the megasporangium has advanced to the cutting off of tapetal cells (0; 400, megasporocarp, showing the terminal megasporangium with one megaspore (m) surviving the degeneration of the others, and t
. A textbook of botany for colleges and universities ... Botany. 172 MORPHOLOGY which becomes hard at maturity, forming a small nuiUke body called the sporocarp (fig. 396). In Salviniaceae, therefore, the sporocarp is a sorus invested by an indusium. Microsporangia and megasporangia. 400 399 Figs. 399, 400. — Azolla: 399, young sporocarp, showing a young megasporangium and the developing indiasium; the megasporangium has advanced to the cutting off of tapetal cells (0; 400, megasporocarp, showing the terminal megasporangium with one megaspore (m) surviving the degeneration of the others, and the microsporangia (mc) checked. — After Miss Pfeiffer. begin to develop in each sorus, but only one kind matures, so that at maturity there are two kinds of sporocarps (megasporocarps and microsporocarps, fig. 398), both kinds occurring on the same plant and even on the same leaf segment. All the sporangia have long. 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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