1916] CURRENT LITERATURE 81 
Stewart while acting as botanist to an expedition of the California Academy 
of Sciences. It is said to be the first representative of the Metzgeriaceae from 
this group of islands. The specific name refers to the unusually large female 
branches. 
GOLDMAN®™ has described 3 new species of Quercus from Lower California, 
included in a collection made by himself and E. W. Nelson during a general 
exploration for the biological survey of the United States Department of Agri- 
culture. The period covered by the expedition was from April 1905 to Febru- 
ary 1906, during which the entire length of Lower California was traversed. 
In addition to the 3 new oaks, 19 other new species have already been pub- 
lished from material collected by this expedition. 
GrRIFFITHS™ has described 10 new species of Opuntia from material col- 
lected mostly in the Mexican border region, and chiefly in Texas. It is a 
noteworthy fact that all of these species have been propagated vegetatively 
in the Opuntia collection growing at Chico, California, have been studied in the 
field, except in one instance, and the majority of them have been grown to 
maturity from the see 
HALLIER,® in his study of the flora of Borneo, has discribed 9 new species. 
Naxat," in this sixth contribution dealing with the woody plants of Korea, 
has presented the Pomaceae, describing 4 new species of Pyrus. 
OKAMURA has published a list of marine algae collected in the Caroline 
Islands in r915. The list includes 28 species of Chlorophyceae, 11 species of 
Phaeophyceae (2 new species), and 22 species of Florideae (1 new species). 
OsTERHOUT" has described a new species of Phacelia (P. denticulata) from 
Colorado. It is related to P. glandulosa and P. neo-mexicana. 
PENNELL” has begun a series of notes on the plants of the southern states. 
The first paper consists chiefly of a critical revision of the genus Commelina 
the United States. The full key to the species, serving the purpose of ene 
descriptions, is followed by a list of the 9 recognized species with full citation 
of exsiccatae. 
** GOLDMAN, E. A., Plant records of an expedition to Lower California. Contr. 
US. Nat. Herb. 16:309-371. pls. 104-133. 1916. 
” GrirFitus, Davin, New species of Opuntia. Bull. Torr. Bot. Club 43:83-92. 
pls. 2, 3. 1916. 
3 Haver, Hans, Beitrige zur Flora von Borneo. Beih. Bot. Centralbl. 34:19- 
53- 1916. 
4 Nakal, T., eee ad floram sylvaticam Koreanam. VI (Pomaceae). 
Bot. Mag. Tokyo 30:15-33. 1916. 
** Okamura, K., List of marine algae collected in Caroline Islands, 1915. Bot. 
Mag. Tokyo 30:1-14. figs. 9. 1916. 
* OsterHouT, G. E., A new Phacelia from Colorado. Torreya 16:70-71. 1916. 
” PENNELL, F. W., Notes on plants of the southern United States. I. Bull. 
Torr. Bot. Club 43: dest. 1916. 
