CURRENT LITERATURE 
MINOR NOTICES 
Das Pflanzenreich.t—Part 27 contains the Polemoniaceae by A. BRAND, a 
family of peculiar interest to North American botanists. The author defines 
two subfamilies, COBAEOIDEAE and PoLEMONIOIDEAE, the former containing 
Cantua and Cobaea, the latter the other ten genera. The genera and the number 
of their species are as follows: Cantua (6, with 2 new), Cobaea (9), Polemonium 
(29, with 3 new), Collomia (12), Phlox (49, with 9 new), Gilia (111, with 12 new), 
Aliciella (x), Gymnosteris (1), Navarretia (41, with 7 new), Langloisia (5, with 
1 new), Loeselia (12), Bonplandia (1). The full synonymy and citation of 
collections, the elaborate splitting-up of the species into subspecies, varieties, and 
subvarieties, and the excellent illustrations, make the monograph a mine of infor- 
mation for students of the family. This careful traversing of American taxo- 
nomic work from the European standpoint is most instructive, and helps to focus 
attention upon our differences.—J. M. C. 
Tylostomeae.—This ‘“‘very natural tribe” of Gasteromycetes is described by 
Liovp in a separately printed pamphlet,? which is dedicated to M. P. Harror, 
whose portrait forms its frontispiece. LioypD recognizes seven genera, of which 
five are monotypic, Tylostoma containing the most of the species. Al are illus- 
trated by good photographs.—C. R. B. 
- NOTES FOR STUDENTS 
Monograph of Ravenelia.—A valuable contribution to the literature of the 
rusts has appeared in DreTeL’s? monograph of the genus Ravenelia. In the 
past, investigations relating to this peculiar genus have been necessarily of a 
more or less fragmentary nature, dealing with the morphology and taxonomy of a 
limited number of species only. Since the last monograph‘ which is at all com- 
prehensive, a number of new species have been added to the genus from different 
parts of the world. On this account a full morphological and taxonomic treat- 
ment is especially desirable. The present paper is introduced by a discussion of 
1 ENGLER, A., Das Pflanzenreich. Heft 27. Polemoniaceae von A. Brand. 
Pp. 203. jigs. 39 (207). Leipzig: Wilhelm Engelmann. 1907. M. 10.20 
2 Lioyp, C. G., The Tylostomeae. 8vo. pp. 29. pls. 12. figs. 6. Cincinnati, O.: 
The author. 1906. 
3 DIETEL, P., sm der Gattung Ravenelia Berk. Beih. Bot. Centralbl. 
20: 343-413. pls. 5 
4 DierTEL, P., Die ane Ravenelia. Hedwigia 33:22-29, 367-371. 1894. 
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