10 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [ VOL. 10 



Trichosteleum fluviale (Mitt.) Jage. ? 



VENEZUELA: Amazonas: Rios Pacimoni, Yatua, Casiquiare, alt. 100-140 m, on log 

 along uppermost Rio Yatua, Maguire, Wurdack 4' Maguire 41939. 



Taxithelium planum (Brid.) Mitt. 



VENEZUELA : Amazonas : Alto Rio Orinoco, on tree branch along Rio Padamo, alt. 

 150 m, 27 Mar 1953, Maguire & WurdacTc 34794. 



HYPNACEAE 



Ectropothecium apiculatum (Hornsch.) Mitt. 



VENEZUELA: Bolivar: Chimanta Massif, base of southwest-facing escarpment, alt. 

 1365 m, Steyermark $ Wurdack 1350. 



Mittenothamnium minusculifolium (C. M.) Card. 



VENEZUELA: Bolivar: Chimanta Massif, densely forested slopes between upper reaches 

 of Rio Tirica (left-hand fork) and Riscobel Ledema Camp, southeast portion of Apacara- 

 tepui, alt. 1700-1850 m, Steyermark 75960. 



POLYTRICIIACEAE 



Polytrichum juniperinum Hdw. 



VENEZUELA: Bolivar: Savannas, vicinity Mission Santa Teresita de Kavanayen, alt. 

 1200 m, 18 Dec 1952, Maguire # Wurdack 33809; north-facing slope forest, Sororopan, alt. 

 1800 m, 17-18 Dec 1952, Maguire $ Wurdack 33970. 



Polytrichadelphus peruvianus Broth. 



VENEZUELA: Bolivar: Chimanta Massif, scrub forest near Summit Camp, in large 

 colonies bordering river bank swales, alt. 1925 m, Steyermark Sr Wurdack 366. 



These plants differ from the Costa Rican representatives of*P. peruvianus in 

 several particulars but I believe they can be included in the specific concept 

 without injustice. The stems up to 40 cm long and the less rigid habit may be 

 the result of different growing conditions at a lower altitude, but the structure 

 and shape of leaves are alike. If a subsequent examination of the type of P. 

 valenciae (C. M.) Par. (Catharinea valenciae C. M.) shows no substantial differ- 

 ences, I suspect that Brotherus' name will have to be relegated to synonymy in 

 favor of the earlier published epithet. 



A complete set of the species listed above is in the herbarium of The New 

 York Botanical Garden and a duplicate set in the writer's herbarium. 



