1918] CURRENT LITERATURE 375 
Taxonomic notes.—BLAKeE* has discussed the systematic position of 
Clibadium (Compositae), describing also 5 new species; has revised the genus 
Dimerostemma (Compositae), recognizing 6 species, 1 being new and 4 being 
new combinations; has described new Compositae (chiefly Mexican) under 
Vernonia (3), ERTS Ericameria, Erigeron, Conyza, Grypocarpha, 
Wedelia, Alvordia, Encelia, Simsia (2), Steiractinia, Pappobolus, Verbesina (2), 
Calea, Cacalia (2), besides numerous new varieties, forms, and combinations; 
and also a new genus (Rhysolepis) based on Viguiera morelensis Greenm. e 
same author also describes new spermatophytes (chiefly from British Hon 
duras), among them being a new genus of Apocynaceae (Belandra), and 52 
new species distributed among 41 genera. 
BUTTERS,” in the first of a series of taxonomic and geographic studies si 
North American ferns, has discussed the genus Athyrium as represented i 
various regions. In connection with the critical discussion of seh rg 
involving certain changes of nomenclature, 3 new varieties and several new 
forms are described under various species. The same author also presents the 
results of his studies of Botrychium virginianum and its American varieties, 
among which 4 are described as new. 
Butters and Str. Jonn”’ have described a new species of Lathyrus (L. 
eucosmus) from the Rocky Mountain region, and also two new varieties of 
L. venosus. 
FERNALD* has published a fascicle of taxonomic notes, among which the 
following new species or varieties are described: a new variety of Polygonum; 
new varieties of Ranunculus Purshii, R. pygmaeus, and R. reptans; a new 
variety of Anemone multifida; a new species of Saxifraga and a new variety of 
S. nivalis; a new species of Vitis; and new varieties of Cyperus filicinus and 
Aster cordifolius. 
Hutcutnson” has published a revision of Aspidopierys, a genus of Mal- 
Pighiaceae which includes a group of tall climbing shrubs of the forests of India 
and of the Malay Archipelago. He recognizes 22 species, 3 of which are 
described as new 
OsrerHour® has described’a new Mertensia (M. media) from Colorado, 
closely related to M. lateriflora and M. amoena 
* BLakE, S. F., Contrib. Gray Herb. no. 52. pp. 106. 1917. 
eeiecs F. K., Contrib. Gray Herb. r9:no. 51. pp. 169-216. pl. 123. jigs. 6. 
TQI7. 
sd ae, F. K., and Sr. Joun, H., Studies in certain North American species 
of Lathyrus. Rhodora 19:156-163. 1917- 
*° FERNALD, M. L., Contrib. Gray Herb. New Series, no. 1. Rhodora 19: 
133-155. 1917. 
* Hutcuinson, J., Revision of Aspidopterys. Kew Bull. 1917:no. 3. pp. 91-103. 
% OsteRHOUT, Gro. E., A new Mertensia. Torreya 172175, 176. 1917. 
