CYPERACEZ. 475 
24. Carex tuberculata, Liebm. Mexicos Halver. p. 82; Walp. Ann. iii. p. 707; 
Steud. Cyper. p. 196. 
Souta Mexico, Chinantla, Puebla 7000 feet (Liebmann). 
25. Carex turbinata, Liebm. Mexicos Halvgr. p.77; Walp. Ann. iii. p. 705; 
Steud. Cyper. p. 219. 
SoutH Mexico, Central Cordillera of Oaxaca (Liebmann). 
26. Carex viridis, Jungh. in Linnea, vi. p. 30; Boott, Ill. Carex, p. 159, t. 522; 
Beeck. in Linnea, xl. p. 330. 
Soutn Mexico, without locality (Schiede); Costa Rica, Volcan de Barba (Hoffmann). 
27. Carex vulpinoidea, Michx. FI. Bor.-Am. ii. p. 169; Boott, Ill. Carex, p. 124, 
tt. 404-408; Boeck. in Linnea, xxxix. p. 94. 
CanaDA southward.— Merxico.—CoLomMBIA. 
Order CLX. GRAMINEZ. 
Graminee, Benth. et Hook. Gen. Plant. iii. p. 1074. 
Grasses are spread all over the globe, wherever there is phanerogamic vegetation, 
from the highest polar regions visited to the tropics, and they are specially charac- 
teristic of humid temperate countries. Bentham and Hooker retain 298 genera and 
estimate the number of distinct species at 3100 to 3200. The Mexican grasses are 
numerous, and we have been able to use an unpublished monograph of them (which 
we understand will now shortly appear) by the late Dr. Eugéne Fournier. This mono- 
graph contains 643 species referred to 123 genera; in this Order, however, as in all 
the preceding ones, we have usually taken Bentham and Hooker’s ‘Genera Plan- 
tarum’ as our standard for genera, so that there is a considerable reduction in the 
number in this work. With regard to many of the new species described by Fournier 
which we have had an opportunity of examining, we consider them as varieties unde- 
serving of distinctive names even. Nevertheless we have found his monograph very 
serviceable in drawing up the present enumeration, though it is probable, from the 
intricate synonymy of some of the species, that the same plant figures in more than one 
place. The grasses of the United-States and Mexican Boundary Commission have 
never been published ; and as the specimens of this collection in the Kew Herbarium 
are not localized, we could not include them. Comparatively little is known of the 
_ grasses of Central America, especially of Costa Rica and Nicaragua. 
Series A. PANICACE. 
Panicacee, Benth. et Hook. Gen. Plant. iii. p. 1075. 
The grasses belonging to this series are distinguished by the spikelet being articulated 
with the pedicel below the outer glumes. 
3 p 2 
