330 i. batrachosperme^. (West). [Batracliospermum 
FLORIDK.E. 
I. BATRACHOSPERME^. 
1. BATRACHOSPERMUM Roth (1800). 
1. B. angolense VV. et G. S. West in Journ. Bot. 1897, p. 2. 
Lemanea angolensis Welw. in Herb. 
Puxco Andongo. — Freq. ast unico loco ad rupes submersas in 
rivulo de Cabondo socialis cum Podostemaceis ; med. Feb. 1857. No. 1. 
This may well be taken at first sight for a Lemanea with very- 
numerous nodes, the short lateral branches which clothe the axes of 
the filaments being so very dense and of such uniform length that 
a surface view appears almost parenchymatous. The filaments are 
not much thicker at the nodes than between them. 
2. B. nigrescens W. et G. S. West in Journ. Bot. 1897, p. 2. 
Pungo Andongo. — Freq. ast unico loco in brachio laterali flum. 
Cuanza prope ejus cataract, ad Condo ; March 1857. No. 2 
This is a rather noteworthy species, being so much branched that 
in well-developed specimens the branches aggregate to form narrow 
pencils ; the plant when dry is almost black, and looks like some of 
the marine Floridea . 
3. B. gracillimum W. et G. S. West in Journ. Bot. 1897, p. 2. 
PuNGO Andongo. — Ad lapides submersas in rivulo de Tangue ; 
May 1857. No. 3. 
This very beautiful species is characterized by its numerous elongate 
and delicate branches, which bear the short uniform lateral branches 
evenly without interruption along their whole length. The globose 
clusters of lateral branches, which are developed on every 7th to 12th 
node, are no doubt connected with the fructification ; their terminal 
cells are of a different form from the others, being larger and mostly 
subglobose. The axis of the filament does not pass through the centre 
of this dense mass of branches, but the attachment of the globular 
mass is at one side of the node from which they arise. 
4. B. huillense Welw. ex W. et G. S. West in Journ. Bot. 
1897, p. 3. 
Hun. la. — Freq. ad rupes lapidesque submersas in rivulis prope 
Lopollo ; May 1860. No. 4. Also fragments from No. 187- 
This species is well marked by its peculiar and dense branching, 
specimens dried on paper appearing hypnoid. It reminds one of a 
delicate B. atrum Harv., except as to its branching. This species and 
B. gracillimum adhere very well to paper, while B. nigvpscens and 
B. angolense adhere but slightly. 
II. HILDENBRANDTIACE.E. 
1. HILDENBRANDTIA Nardo (1845). 
1. H. rivularis J. Ag. Species Algar. ii. 495 ; Rabenh. Fl. 
Europ. Alg. iii. 408 ; W. et G. S. West in Journ. Bot. 1897, p. 3. 
Golungo Alto. — Maculis magnis belle sanguineis rupes siliceo- 
arenosas juxta Fontem de Capopa ornat ; Sept. 1855. No. 149. 
