Organography of plants, especially of the archegoniatae and spermaphyta . I\.Uber javanische Lebermoose ; 3, Colura ornata, Goeb., in Annales du Jardin botanique de Buitenzorg,ix (1891% p. 28. * The structure of the joint is not alike in all species ; for details see Goebel, Archegoniatenstudien:\. Die Blattbildung der Lebermoose und ihre biologische Bedeutung, in Plora, Ixxvii ^iS93\ 62 VEGETATIVE ADAPTATION IN HEPATICAE whilst the frame upon which it lies prevents its opening outwards. Whenthe sac becomes emptied of water there can be little doubt that as inPhysiotium it is opened by a crump
Organography of plants, especially of the archegoniatae and spermaphyta . I\.Uber javanische Lebermoose ; 3, Colura ornata, Goeb., in Annales du Jardin botanique de Buitenzorg,ix (1891% p. 28. * The structure of the joint is not alike in all species ; for details see Goebel, Archegoniatenstudien:\. Die Blattbildung der Lebermoose und ihre biologische Bedeutung, in Plora, Ixxvii ^iS93\ 62 VEGETATIVE ADAPTATION IN HEPATICAE whilst the frame upon which it lies prevents its opening outwards. Whenthe sac becomes emptied of water there can be little doubt that as inPhysiotium it is opened by a crumpling up of the valve. I observed Colura tortifolia in British Guiana living upon the leaves oftrees. The leaves were not, as in other Hepaticae which live upon leaves,adpressed to the leaf but directed upwards ^. The valve has here then notmerely to hinder a free evaporation of water, but also the flowing back ofwater, and to this end the capillarity of the narrow sac is favourable. Noanimals were found in the sac, but these inhabitants will be referred
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