18 
Reviews of Foreign Literature. 
Monographia Funcacearum. Franz Buchenau. Engler’s Bot. 
Jahrb., XII 1-495, (mit Tafel I-III und 9 Holzschnitten). 
1890. 
Pages I to 5 contain a description of the order, references to 
the principal literature, and an analytical key to the nine genera. 
Pages 1 to 60 make up a comparative account of the 
Juncacez, each organ and each relationship being discussed in 
detail. Especially noteworthy among these observations are 
those on vicarious species and genealogical relationship. A list 
of twenty pairs or groups of species is given, in which the mem- 
bers of each group are closely related, but have separate, often 
widely separate geographical range. Marsippospermum, Rostko- 
via, and the several sub-genera of Lugula and ¥uncus have been 
derived, it is believed, from a type form similar to the “ Junci 
-poiophylli,” of which ¥. bufonius and F. tenuis are examples. 
It is to be noted that the genera MJarsippospermum and Rostko- 
vta are represented as branching from subgenera of Juncus. The 
author, therefore, does not consider that groups of species, in or- 
der to be entitled to separate generic rank, must possess co-ordi- 
nate differentiation; but that one existing genus may have been 
derived from a form belonging to another existing genus. 
Pages 60 to 463 contain the systematic part proper of the 
monograph. Of the nine genera, Distichia, Patosia and Oxy- 
chloé, are confined to the mountains of South America; Marsip- 
pospermum and Rostkovia to New Zealand, southern South 
America and the adjacent islands; Prionium to the Cape of 
Good Hope; Luzula and Funcus are widely distributed, and 
Thurnia, doubtfully classed with the Juncacez, is found only in 
British Guiana, 
The number of species in each genus is as follows: 
Total. North American, Mexican, additional. 
north of Mexico. 
Distichia, 
3 te) is) 
Patosia, I ° ° 
Oxychiloé, I o fo) 
Marsippospermum, 2 fo) oO 
Rostkovia, I re) re] 
Prionium, I ° re) 
Luzula, eee 8 (besides LZ. Caroline) 3 
Juncus, 176 65 4 
Thurnia, 2 o fo) 
