. Introduction to cryptogamic botany. Cryptogams. INTRODUCTION TO CItYPTOaAMIG BOTANY. 375 development of the filamentous element of Strigula, a genus in which the cortical element usually prevails. Ccenogonium, on the contrary, appears to be a normal form, remarkable for the almost total suppression of the upper stratum. The place of growth is similar to that of Dictyonema, and its habit is very much the same. It is just possible that the various species of Chroolepus, which have some resemblance to Cepha- leurus (Fig. 81, a), may be peculiar states of certain Lichens, their reproductive bodi
. Introduction to cryptogamic botany. Cryptogams. INTRODUCTION TO CItYPTOaAMIG BOTANY. 375 development of the filamentous element of Strigula, a genus in which the cortical element usually prevails. Ccenogonium, on the contrary, appears to be a normal form, remarkable for the almost total suppression of the upper stratum. The place of growth is similar to that of Dictyonema, and its habit is very much the same. It is just possible that the various species of Chroolepus, which have some resemblance to Cepha- leurus (Fig. 81, a), may be peculiar states of certain Lichens, their reproductive bodies being very Fig. 79. a. Section of a Collema, showing new fronds arising from the sur- face. From Noukaheva. b. Sporidlum of Biatora marginiflexa, Bab. From New Zealand. Communicated by Dr. Hooker. c. Leptogium bullatum, showing a section of one of the apthoiis pro- cesses with its fertile disc, the sporidia and external cells of the frond. More or less magnified. From Assam. Communicated by Dr. Hooker. It is the form figured by Swartz, in Lioh. Amer. 411. If the CoUemals are associated with Lichens, which appears to me the most natural arrangement, we have still, in most cases, the medullary and cortical layers with gonidia, dis- posed frequently in long moniliform threads (Fig. 79, a); but we have in addition an abundant gelatinous element, in consequence of which, many are hard and rigid when dry, and when moist- ened resemble closely some of the Algas. Indeed, some states. 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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