404 
PACIFIC SCIENCE, Vol. VIII, October, 1954 
Fig. 19- a, Rosenvingea orientalis: Habit, X 1. Rosenvingea nhatrangensis: Habit, X 1. 
Type Locality: Epiphytic on Diplanthera 
and on algae on the sand flats of Cua Be near 
Truong Dong. 
Additional material: Same locality, Mar. 15, 
1953, on a shell (11432). 
This species is apparently most closely re- 
lated to Rosenvingea fastigiata (Zanard.) B0rg., 
especially to the variety major Reinb., which 
reaches a branch diameter of 5 mm. That 
species also has the sori in rings around hair 
groups, but its regular dichotomous branch- 
ing and the equality of diameter throughout 
give it a very different aspect from the present, 
much-inflated, and lobed, short species. 
Rosenvingea orientalis (J. Ag.) B0rgesen 
1914: 182; B0rgesen 1930: 168. Asperococcus 
orientalis]. Agardh 1848: 78 (Manila, Phil- 
LOCAL DISTRIBUTION: Sta. 4 (11180); in 
drift, Sta. 3 (11091). 
This species seems not to have been illus- 
trated, and I have seen no authentic material. 
However, my plants agree with Agardh ’s de- 
scription and with B^rgesen’s comments 
about the plant. The fine attenuation of the 
branch-apices is distinctive. 
Chnoospora implexa Hering, ex J. Agardh 
1848: 172 (Red Sea); Weber van Bosse 
1913: 137; Yamada and Tanaka 1938: 67. 
