RL Le 
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Panama mosses 
R. S. WILLIAMS 
The following rather brief list of mosses is made up of species 
collected along the Canal Zone by Dr. Marshall A. Howe, in the 
latter part of 1909 and early in 1910, and by the author, about a 
year previously, chiefly in the vicinity of Penonomé, some hundred 
miles west of the zone, and also about Cana, nearly the same 
distance east of the zone, in the province of Darien. 
Of the 39 species listed, 32 occur in South America, 9 species 
are found in both North and South America, and 6 species, I 
believe, are known only from Central America. 
DICRANELLA HILARIANA (Mont.) Mitt. Howe, Culebra, Dec. 
1909. 
I believe this to be a widely distributed species occurring 
throughout northern South America, the West Indies, Mexico, 
and the southern United States. It includes numerous slight 
varieties that have been given specific names, among others D. 
tenuirostris (Kunze) Mitt., D. Liebmanniana (C. M.) Besch., D. 
mexicana (Besch.) Jaeg. and D. trematodontifolia (C. M.) Par. 
DICRANELLA PERROTETTIX (Mont.) Mitt. Williams 1058, 
Cana, on earth along ditches, April. 
HOLOMITRIUM CRISPULUM Mart. Williams 1050, Cana, on 
trees at 900 m., April. 
LEUCOBRYUM GIGANTEUM C. M. Williams 1061, Cana, at 
1200 to 1800 m. 
OcTOBLEPHARUM ALBIDUM (L.) Hedw. Howe, Taboga Island, 
and Williams 1048, Penonomé. 
FISSIDENS POLYPODIOIDES (Sw.) Hedw. Williams 1080, Cana, 
1800 m. alt. 
SyRRHOPODON BRACHYSTELOIDES C. M. Williams 1052, Mar- 
raganti, at head of Gulf of San Miguel, on trees at 15 m. elevation, 
April, 1908. 
SyRRHOPODON BERNOULLI C. M. Williams 1046, near Cana, 
1200 to 1800 m. elevation, April, 1908. 
33 
