1888. | BOTANICAL GAZETTE. 133 
A classified stock of duplicates belonging to the department is avail- 
_ able as a basis of an exchange herbarium. 
10se desiring to exchange specimens should address, for rules and 
2 nor tnation, Dr. Geo. Vasey, U. 8S. Dep. of Agriculture, Washing- 
ton, D.. ‘ 
ss Gro. Vasrty, SeERENo Watson, N. L. Barrron, THos. Morone, B.D _ 
Hatstep, Committee. : 
CURRENT LITERATURE. 
; The families of plants. a 
The rapid advance in our knowledge of plants which has come from 
the wonderful development in appliances seems to demand a new gen- 
_ eral presentation of the plant kingdom. For the Phanerogams this is 
¥ 
g 
bundant and most excellent, while the — 
text is all that could be desired. ‘The publisher is to be commended, not 
only for the handsome typography, but also for the very low price, which 
puts this invaluable work within the reach of almost every botanist. It 
appears in separate numbers, which come rapidly enough, but which hold 
n9 special relation to each other. Thus far the only completed parts are 
the second, fourth and fifth of the second volume, although pehgren - 
_F. Pax. Of the grasses 12 tribes are recognized, and 315 genera. , 
acer there are 65 genera, Carex being said to contain more than 500 apecies. ee 
Volume 11, Part 4 (in 2 numbers), is more varied in its nature, confining 
~*Sveral small groups, as follows: Flagellariacex (3 genera), Miryronce > 
E (1 genus), NXyridacex (2 genera). Rapateacee (6 genera). and Pp hilydrace. 
GB genera), : gler; Restionacex (19 genera), Centr sacha a 
a ee 
(9 Benera), Amaryllidacex (71 genera), Velloziacew (2 genera), Tacomcen Me 
genera), Dioscoreacex (9 genera), and Iridacee (61 genera), by F. Pax. a 
Smi @ are included under Lilixces. while Androstephium Torr. 18 piace 
attungen 
0. 3 
ia A., and PrantL, K.—Die natiirlichen Pflanzeniamilien nebst ihren G A 
Co Wichtigeren Arten insbesondere den Nutzpflanzen. Volumen, Parts 2, + M150 
SPlously illustrated. Leipziz: Wilhelm Engelmann, 1887. Subseription pric? MW 1% 
