]}^ostoc] XVIII. NOSTOCE^ (West). 373 



XVIII. NOSTOCE.E. 



1. NOSTOC Vauch. (1803). 



1. N. repandum W. et G. S. West in Jouin. Bot. 1897, p. 267. 

 PuNGO Andongo. — Freq. ad rupes editiores vulcan. Prsesidii prope 



Cabondo tempore pluvio, intra dies duas tresve ingente copia obvia ; 

 Feb. 1857. No. 21. 



The nearest species to this is iV. humifufmm Carm., from which 

 it is distinguished by its very large coriaceous non-tuberculate 

 fchallus, by its constantly elliptical or doliform cells, and by its larger 

 heterocysts and spores. 



2, N. paradoxum Wehv. ex W. et G. S. West in Journ. Bot. 

 1897, p. 268. 



PuNGO Andongo. — Ad muscos dense cjespitosos juxta rivulos prope 

 Pedra Songue in ips. Prjesidio ; April 18.57. No. 20. 



This species belongs to that division of the section Hunufum, with 

 cylindrical cells. 



3. N. muscorum Ag. Dispos. Algar. Suec. 44 (1812) ; KUtz. 

 Tab. Pbyc. ii. (1850-2), 2, t. 5, f. iv. ; Born, et Flah., I.e., vii. 

 200-1 (1888) ; W. et G. S. West, I.e. 



PuNGO AxDOXCJO. — Ad rupes schist, pr. Candumba-Calundo ; Jan. 

 1857. No. 22. Cambondo ad rupes ; Feb. 1857. No. 285. 



4, N. minutum Desmaz. Plantes Cryptog. du Nord de la France, 

 fase. xi. no. 501 (1831) ; Born, et Flah., >.c., 209 (1888); W. et 

 G. S. West, I.e. 



This is not identified with certainty, as it was seen in very small 

 quantity ; spores elliptical, concatenate. 



MossAMi:i)ES. — Inter Q'Jdogom/ sp. in stagnis puris ad ripas flum. 

 Bero ; Aug. 1859. No. 190. 



2. ANAB^NABory (1822). 



1. Anabaenae sp. W. et G. S. W^est, I.e. 



GoLUNGO Alto. — Specimens very fragmentary, and spores not 

 attached to the trichomes. 



Freq. sed cito marcescens ad latera rivuli Coango ; Aug. 1857. 

 No. 163. 



XIX. CAMPTOTRICHEiE. 



W. et G. S. West in Journ. Bot. 1897, p. 268. 



1. CAMPTOTHRIX W. et G. S. W^est, I.e., p. 269. 



1. C. repens W. et G. S. West, I.e. 



HuiLLA. — Epiphytica supra Srhizofrichem nat<inteiu et Microcoleum 

 socwtum, in uliginosis editioribus prope Humpata, Empalanca et 

 Lopollo, plagas spongiosas unacum Eriocauloneis, Xyridibus et Utricu- 

 lariis constituens, 6000 ad 5500 ped. elevat. ; May 1860. No. 15. 



The diverse forms of the cells and their irregular disposition in the 

 short tapering filaments give a character to this genus not possessed by 

 any other of the genera of either the Var/itiariece or the Lytigbyece, and 

 necessitated the plant being placed as the type of a new order {Carnpto- 

 trlchem) of HormoyonfO' HomocyKtcrr. 



VOL. II. 25 



