1897 | CURRENT LITERATURE 65 
journal in 1892. The present contribution adds thirteen new species. A 
recent contribution from the Gray Herbarium by Dr. B. L. Robinson and 
Mr. J. M. Greenman contains the following subjects: a revision of the genus 
Tridax, containing twenty-two species, three of which are new; a synopsis of 
the Mexican and Central American species of the genus Mikania, containing 
thirteen species ; a revision of the genus Zinnia, containing sixteen species, 
two of which are new ; a revision of the Mexican and Central American spe- 
cies of the genus Calea, containing twenty-eight species, five of which are 
new ; a provisional key to the species of Porophyllum north of the Isthmus of 
Panama, containing twenty-six species, three of which are new; descriptions 
of new and little known phanerogams, chiefly from Oaxaca, the new species 
belonging to the genera Habenaria, Spiranthes, Cranichis, Microstylis (2 
spp.), Phoradendron, Euphorbia (3 spp.), Cardiospermum, Erythraa, Nama 
(2 spp.), Berendtia, Castilleia, Carlowrightia (2 spp.), Oldenlandia, Eupato- 
rium (2 spp.), Chrysopsis, Bigelowia, Lagascea, Trigo: rmum, Montanoa 
(2 spp.), Viguiera, Verbesina (4 spp.), Dahlia, Flaveria, Liabum, Senecio, 
papers: the puff balls of eastern Iowa, by T. H. MacBride and Norra Allin ; 
new species of tropical fungi, by Ellis and Everhart, fourteen in number, and 
chiefly from Nicaragua; and the Nicaraguan myxomycetes, by T. H. 
MacBride and C. L. Smith. The current parts (140 and 141) of Engler and 
Prantl’s Natirlichen Pflanzenfamilien contain the continuation of Labiatz, 
by J. Briquet, in which Calamintha is merged under Satureia, and Pycnan- 
themum becomes Koellia; and the completion of the Fucacezx, by F. R. 
Kjellman, and the beginning of Rhodophycez, by Fr. ochenite and P. Haupt- 
fleisch.—_J. M. C. 
HANSGIRG recognizes* four types of flowers whose protection of their 
pollen against rain belongs to the realm of phytodynamics. hie Plants whose 
flowers close in rainy weather, so that the entrance of rain is rendered 
raging or dears enarees ica’ the — or sigan —— upon a “ge 
ete., against w 
cial rainavoiing — of snipe an Plants whose ra aees aes 
ncaa curvatures of the | axis of 
mb is, 
. 
