. Introduction to cryptogamic botany. Cryptogams. INTRODUCTION TO CRYPTOGAMIC BOTANY. 435 G. Marchantioides occurs also at Buenos Ayres and the Swan River. Sphcerocarpus (Fig. 90, a, b, c) has superficial fruit with a sessile or pedicellate proper involucre. The species occur in temperate parts of either hemisphere. The most curious genus of all is Riella (Fig. 90, d to g, formerly Durima*. Fig. 90. a. SphcBTOcarpus ierrestris, slightly magnified. From a Lyons specimen given me by Dr. Montagne. b. A young mother-spore before division, together with an old triple spore, with its areolate verruc
. Introduction to cryptogamic botany. Cryptogams. INTRODUCTION TO CRYPTOGAMIC BOTANY. 435 G. Marchantioides occurs also at Buenos Ayres and the Swan River. Sphcerocarpus (Fig. 90, a, b, c) has superficial fruit with a sessile or pedicellate proper involucre. The species occur in temperate parts of either hemisphere. The most curious genus of all is Riella (Fig. 90, d to g, formerly Durima*. Fig. 90. a. SphcBTOcarpus ierrestris, slightly magnified. From a Lyons specimen given me by Dr. Montagne. b. A young mother-spore before division, together with an old triple spore, with its areolate verrucoae surface. From Moug. and Nest., No. 1045. c. One of the cells of the wall of the sporangium filled with starch grains. d. Ridla helicophylla, male and female, nat. size From specimens given me by Durieu de Maisonneuve. e. Perianth and inclosed sporangium. /. Sporangium. g. Orifice of sporangium. which differs from the rest in its erect habit. The stems are branchless and have a distinct wing or leaflet, forming a con- tinuous spiral round the stem, much after the fashion of the stomach of a shark. In the male plant the edge of the frond bears the antheridia; in the female the fruit springs from the * Montagne, in Ann. d. Sc. Nat., sSr 3, vol. 18, p. 11. 28 *. 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 Berkeley, M. J. (Miles Joseph), 1803-1889. London, New York, H. Bailliere; [etc. ,etc]
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