Organography of plants, especially of the archegoniatae and spermaphyta . t seen from above. Natural size. It bears a sporogonium which isshown somewhat smaller than natural size. hibit the highest stage of development of the anacrogynous Hepaticae, inas-much as the shoots which bear the sexual organs possess terminal antheridia and archegonia, to which I shall refer when Ispeak of the position of sexual organs , the cylindric shoot-axis is sharply de-marcated from the transversely inserted leaves,and there is throughout a typical leafy shoot. Itis interesting to note that occ
Organography of plants, especially of the archegoniatae and spermaphyta . t seen from above. Natural size. It bears a sporogonium which isshown somewhat smaller than natural size. hibit the highest stage of development of the anacrogynous Hepaticae, inas-much as the shoots which bear the sexual organs possess terminal antheridia and archegonia, to which I shall refer when Ispeak of the position of sexual organs , the cylindric shoot-axis is sharply de-marcated from the transversely inserted leaves,and there is throughout a typical leafy shoot. Itis interesting to note that occasionally anisophyl-lous shoots appear. The leaves of one lateral rowhave one side smaller than the other, and mayindeed occasionally almost entirely abort, whilstthe leaves in the other two rows have an obliquenot transverse insertion. The importance of thiscase lies in its features being determined byexternal factors, and therefore showing that thisconstruction of the leaves, which is the dominantone in the acrogynous foliose Hepaticae, may bereached experimentally ^. Fig. 37. Calobryum Blumii, of a female plant. Hi, Hn, Hm,stolons united into a sympodialchain and serving as roots; I, II,JIl, their foliage-shoots ; N, acces-sory stolon,s. Natural size. {c) LEAVES AND SHOOTS OF ACROGYNOUS FOLIOSE FORMS. In this group we have growth usually from a three-sided apical cell ^,which gives rise to a typical tristichous leafy stem, but the ventral row of here shown that Calobryum^ which until now has been considered to be quite unique, should beunited in one group with Haplomitrium, and I have called the group Calobryaceae. Schiffners(^Hepaticae, in Engler and Prantl, Die natiirlichen Pflanzenfamilien, 1893, p. 60) alteration of thename to Haplomitrioideae is quite arbitrary. ^ See Part I, p. 102. Also Goebel, Morphologische und biologische Studien : IV. Uber javanischeLebermoose ; 2, Calobryum Blumii, Nees, in Annales du Jnrdin botanique de Buitenzorg, ix (1891),p. 16. ^
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