OF INDIA AND CEYLON. 
187 
Weddell’s"*^' monograph has been the standard for subse- 
quent lists and descriptions of the Indian species. He accepts 
nearly all the species mentioned above. In Terniola, there- 
fore, he puts seven species. In Hydrobryum, re-defining 
the genus, he leaves H. Griffithii only, olivaceum and 
griseum being united and transferred to Podostemon. He 
puts Mniopsis selaginoides into Dicræa, makes D. rigida, 
Wightii, and longifolia into varieties of dichotoma, and 
establishes two new species, D. pterophylla and D. 
minor, from material collected by Hooker in the Khasia 
mountains. Mniopsis Hookerianus and M. J ohnsonii he puts 
into Podostemon, and adds to this genus two new species, 
P. acuminatus from the Khasias and P. microcarpus (Hydro- 
bryum lichenoides, Kurz) from Burma. 
Bentham and Hookerf follow Weddell fairly closely, 
but unite Dicræa to Podostemon. Their grouping of the 
order rests, like Weddell’s, on rather too variable characters, 
and often breaks down in practice. 
Warming, J in the second of his beautiful series of mono- 
graphs of the order, describes Dicræa elongata and D. 
algæformis in detail from Ceylon material. In subsequent 
papers he has described Podostemon subulatus, Hydrobryum 
olivaceum, P. acuminatum (this he places in a new genus, 
Polypleurum, to which he also refers a new Siamese species, 
P. Schmidtianum ; I do not regard this genus as tenable), 
Lawia zeylanica, and L. foliosa. In the final paper of the 
series he deals with the classification of the order. Podoste- 
mon Hookerianus he transfers to a new genus, Griffithella, 
and describes a new species, G. Willisiana, which I hardly 
think is really distinct from G. Hookeriana. Lawia he 
divides into three genera, Lawia (zeylanica type), Terniola 
(foliosa type), and Dalzellia (ramosissima type). The 
* De Candolle, Prodr. Syst. Nat. Regni Veget., XVII., p. 39, 1873 
(October). 
t Genera Plantarum, vol. III., p. 105, 1880. 
Î Warming, Familien Podostemaceæ, I.-VI., Kgl. Dansk. Vid. Selsk. 
Skr., 6 Rk. II., 1881, II., 1882, IV., 1888, VII., 1891, IX., 1899, XI., 1901. 
