376 BOTANICAL GAZETTE [APRIL 
Pirtrer' has published a revision of the Mexican and Central American 
species of Lonchocarpus, recognizing 40 species, 24 of which are described as 
new. He also describes 4 new species of the same genus from South America. 
SMALL? has described a long known but unstudied tree cactus of the 
Florida Keys as a new species (Cephalocereus Deeringii). It had been “‘assumed 
to be identical with the species of Cephalocereus long known to grow on Key 
West.” 
SMITH,35 in a first paper of a series of studies of Lupinus, describes a new 
species (L. subvexus) from California. 
SwINGLE* has described a new genus (Pamburus) of Aurantiaceae related 
to Citrus. It is a native of India, and as yet includes only the type species 
. missionis, which is Limonia missionis Wight. The same author*s has also 
described Pleiospermium as another new genus related to Citrus, founded on 
Limonia Wight and Arn., and including two species.—J. M. C 
Embryo sac and embryo of Phaseolus.— Miss Brown* has described the 
details of the development of the embryo sac and the embryo of Phaseolus 
vulgaris. The only previous study of this genus was by GUIGNARD in 1881, 
in his general work on Leguminosae, in which P. multiflorus is described. ‘The 
details for P. vulgaris introduce no unusual situation, but it is valuable to know 
the facts in reference to so conspicuous a species.—J. M. C 
ruit drop.—Hopcsons’ believes he has found a correlation between the 
June drop of the Washington navel orange and the daily fall in water content 
of the fruit and foliage. He says, “inasmuch as in the case of certain other 
plants the abscission of young fruits has been shown to be due to abnormal 
water relations, it is suggested that such may be the case here.’”—WM. 
CROCKER. 
3 PittreR, Henry, The Middle angie species of Lonchocarpus. Contrib. 
U.S. Nat. Herb. 20:37-03. pls. 6. figs. 43. 
3? SMALL, JOHN K., The tree Cacti of ae Florida Keys. Jour. N.Y. Bot. Gard. 
18:199-203. pl. 206. 1917. 
3% SMITH, CHARLES Piper, Studies in the genus Lupinus. 1. A new species of 
the subgenus Platycarpos. Bull. Torr. Bot. Club 44:405, 406. 1917. 
34 SWINGLE, WALTER T., — a new genus related to Citrus, from India. 
Jour. Wash. Acad. Sci. 6:335-338. 19 
35 ————~ wiaripy iapysags a new genus — to Citrus, from India, Ceylon, and 
Java. Jour. Wash. Acad. Sci. 6:426-431. 1916. 
3% BROWN, Mapex Re ey Sa of the embryo sac and of the embryo 
in Phaseolus vulgaris. Bull. Torr. Bot. Club 44:535-544. pls. 25, 26. 1917- 
37 Hopcson, R. W., Some abnormal water relations in Citrus trees of the arid 
southwest and their possible significance. Univ. Calif. Publ. Agric. Science 3:37-54- 
1917. : 
