232 BOTANICAL GAZETTE [SEPTEMBER 
and biology. A chapter on bacteria and soil minerals has been added. Tuber- 
culosis is the only disease which is treated at length. The treatment of acquired 
immunity is misleading, in that vaccination is the only method of conferring 
immunity which is discussed, and the natural inference is that diphtheria and 
other diseases are thus treated. Antitoxins are not mentioned. A part of a 
chapter on fungus diseases of plants shows plainly the effect of too much con- 
densation. The characterization of wilts, rusts, etc., on page 295 is unscientific 
and inaccurate. The student can gain little by a mere list of names of hosts an 
parasites such as this chapter contains. ‘There is much that might be eliminated 
to make room for more adequate treatment of other subjects. As an introduction 
to the subject for the general reader or for the high-school student the volume is 
excellent; as a college text, however, it seems inadequate——R. E. BUCHANAN. 
NOTES FOR STUDENTS 
Current taxonomic literature-—R. Hdroip (Bot. Jahrb. 42:251-334- 1909) 
presents a synoptical revision of the American Thibaudieae and carefully tabu- 
lates their geographical distribution. One monotypic genus (Englerodoxa) and 
67 species referred to 17 genera are published as new to science.—G. MASSEE 
(Annals of Botany 23:336. 1909) has published a new genus (Gibsonia) se * F 
Ascomycetes; the new fungus was found growing in a drain in North Lancashire, 
England.—E. A. Fryer (Bull. Soc. Bot. Fr. IV. 9:97-104. pls. 1, 2: 1909) 
describes several new or noteworthy species of Orchidaceae, some of which are 
American.—L. A. Dope (ibid. 232-234) has published a new genus (Orias) of 
the Lythraceae from China—N. L. GarpNer (Univ. Cal. Pub. Bot. 3:37!-375: 
pl. 14. 1909), under the title “New Chlorophyceae from California,” has publ: 
two new monotypic genera (Endophyton and Pseudodictyon); a new species 
Ulvella is also proposed —O. TscHourIna (Bull. Soc. Bot. Genéve II. 1:98-I0I- 
1909) has published a new genus (Astrocladium) of the Palmellaceae. The new 
alga was discovered in the vicinity of Geneva, Switzerland, and is represented by 
a single known species.—W. BIALOSUKNIA (ibid. 101-104) proposes a new genus 
(Diplosphaera) of the Pleurococcaceae, to which is referred but one species 
The alga was isolated from the lichen, Lecanora tartarea, and developed as 4 
culture.—G. O. (ibid. 182) records a new species of Xyris from Brazil. 
V. CaLESTANI (Nuovo Giorn. Bot. Ital. N. S. 15:355-390. 1908), under the title 
“Sulla classificazione delle crocifere italiane,” recognizes 31 genera for Italy, 
including one genus (Euxena) published as new to science.—R. PAMPANINI 
Soc. Bot. Ital. 1908:132-134) describes a new species and variety of Bi sin 
indigenous to Mexico.—K. K. MACKENZIE (Muhlenbergia 5:53-58- 1999) 
several species of Carex collected by A. A. HELLER in Nevada in 1908 and describes 
two new species.—P. B. Kennepy (ibid. 58-61. pl. 2) in continuation of bis 
‘Studies in Trifolium” describes and illustrates a new species from Orer 
W. Fawcert and A. B. RENpLE (Journ. Botany 4'7:122-129. 1909) in contin’ 
tion of their studies on Jamaica orchids have published 13 new species belonging 
to various genera and one new genus (Neo-urbania); the new genus is based 0° 
of 
