Handbook of practical botany for the botanical laboratory and private student (1908)
Strasburger, Eduard, 1844-1912, Hillhouse, William, 1850-1910 · London, S. Sonnenschein; New York, Macmillan · leaf 272
s arise out of thefrond, as far as the median or laminar scales, or only the former,extend. They lie close to the frond, and follow the mid-rib inbundles, covered by the scales. They probably serve to stiffenthe thallus. The ordinary rhizoids proceed chiefly from themidrib, and turn at an acute… … Fig. ^^.—Marchantia polymorpha. A, an air-pore from above. B, in cross-section(x 240). A cross-section through the thallus shows us on the dorsalsurface first a zone of chlorophyll-containing tissue. The interiorof the thallus is composed of broader cells, almost devoid ofchlorophyll. In the walls…
Botany · Plant physiology · Microscopy
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