Abstract
Caudalejeunea grolleana Gradst. spec. nov. from Madagascar is referred to this genus with some doubt because of the absence of gemmiparous branches. Ptychocoleus cristilobus (Steph.) Steph. from S. E. Asia has gemmiparous branches and therefore is a true Caudalejeunea: C. cristiloba (Steph.) comb. nov. This species is remarkable by its complicated ciliate leaflobule and by its polystratose rhizoid-disc. Two subspecies are distinguished: ssp. cristiloba from Burma, Andaman Is., Thailand, and Singapore, and ssp. samoana (Steph.) comb. nov. (Caudalejeunea samoana Steph.) from Samoa. Both C. grolleana and C. cristiloba have a 4-5-carinate perianth, which shows that the trigonous perianth present in most species of Caudalejeunea is not a stable character of this genus.
Highlights
The tropical liverwort-genus Caudalejeunea Steph. at the moment comprises about 13 species: C. lehmanniana(Gott.) Evans from America, C. africana (Steph.) Steph., C. dusenii Steph., C. hanningtonii (Mitt.) Schiffn., C. katangensis VandenB., C. lewallei VandenB., C. madagassa Steph. (?), c. tricarinata Jones, and C. yangambiensis (VandenB.) Jones from Africa, C. circinata Steph., C. reniloba (Gott.) Steph., C. samoana Steph., and C. stephanii Spruce ex Steph. from Asia and the Pacific
Both C. grolleana and C. cristiloba have a 4-5-carinate perianth, which shows that the trigonous perianth present in most species of Caudalejeunea is not a stable character of this genus
According to Jones (1953) the species preferably grow on twigs and small branches of shrubs or on lianes rather than on the stems of trees; they can be epiphyllous
Summary
Caudalejeunea grolleana Gradst. spec. nov. from Madagascar is referred to this genus with some doubt because of the absence of gemmiparous branches. From Madagascar is referred to this genus with some doubt because of the absence of gemmiparous branches. Asia has gemmiparous branches and is a true Caudalejeunea: C. cristiloba (Steph.) comb. This species is remarkable by its complicated ciliate leaflobule and by its polystratose rhizoid-disc. Cristiloba from Burma, Andaman Is., Thailand, and Singapore, and ssp. Both C. grolleana and C. cristiloba have a 4-5-carinate perianth, which shows that the trigonous perianth present in most species of Caudalejeunea is not a stable character of this genus
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