GRIFFITHS—THE GRAMA GRASSES. 383 
Schultes, Kunth, and Steudel. A plant in the herbarium of the Botanic Garden at 
Madrid bearing this name in Lagasca’s hand, is what in this country we have been 
calling B. polystachya. Of course this specimen is not the type, for Lagasca’s first 
herbarium was burned, but this specimen named by him and his description, so far 
as it goes, applying to B. polystachya, leaves no doubt in my mind about the identity 
of the species. 
Actinochloa barbata Roem. & Schult. Syst. Veg. 2: 420. 1817, Based upon Bou- 
teloua barbata Lag. 
Eutriana? barbata Kunth, Rév. Gram, 1: 96. 1829. Based upon Bouteloua barbata 
Lag. 
Chondrosium polystachyum Benth. Bot. Voy. Sulph. 56. 1844. Through the kind- 
ness of the authorities at the Royal Botanic Gardens at Kew, I have been able to exam- 
ine a liberal specimen of the type (Barclay, Magdalena Bay, Lower California), A 
specimen of the same collection is in the National Herbarium. Attention should be 
called to the fact that this is a very different species from the Palmer specimen ¢ from 
the Yaqui River region of Sonora, collected 
in 1869, said by Munro to be ‘‘typical.”’ 
Bouteloua polystachya Torr. U. S. Rep. 
Expl. Miss. Pacif. 52: 366. pl. 10. 1857. 
Based upon Chondrosium  polystachyum 
Benth. 
Bouteloua pumila Buckl. Proc. Acad. 
Phila, 1863: 93. 1863. The type (Wright 
754, Texas) is in the herbarium of the Phil- 
adelphia Academy. 
Chrondrosium exile Fourn. Mex. Pl. 
2: 137.1881. The type (Berlandier 842) in 
the Paris Herbarium is Bouteloua barbata. 
It is referred there to the genus Chloris 
and credited to Fournier, but so far as I AM y 
know was never published in that genus. \\\ [ Wi 
The specimen is a narrow-spiked, short- \\ 2 a 
awned form. The same number in the Fia. $8.—Boutelowa barbata. a, Spikelet; 6, c, 
Vienna Herbarium is the same speciesand — Jemma and palet of first floret; d, e, rudimentary 
is named “ Bouteloua barbata Rupr.”’ lemma and palet of second floret; f, rudiment 
Chondrosium microstachyum Fourn. Mex,  ° third floret. a, Scale 7.5; b-f, seale 20. From 
Pl. 2:138. 1881. The type (Bourgeau ‘ype specimen of B. pumila. . 
667) is in the Paris Herbarium. Specimens of the same collection are also in the 
herbarium of the St. Petersburg Botanical Garden and in the National Herbarium, 
the former being labeled B. oligostachya. 
Bouteloua microstachya Dewey, Contr. Nat. Herb. 2: 531. 1894. Based on Chon- 
drosium microstachyum Fourn. Dewey considers B. arenosa Vasey and B. polystachya 
Benth. as in part synonymous with this. 
| 
DESCRIPTION. « 
Plants exceedingly variable in both size and general aspect, erect when growing 
thickly, but prostrate when scattered, in favorable situations as much as 30 cm. high 
(as in Griffiths 6095) or prostrate, the tuft covering 3 or 4 square feet of surface, or 
consisting of single culms not over 3 cm. long; culms geniculate and freely branching 
when luxuriant, but mostly simple, especially if on sterile soil; sheaths loose, striate, 
smooth, comparatively short; blades short, flat, commonly 1 to 4 cm. long, divergent, 
«See Bouteloua sonorae, page 389. 
9368°—12.—4 
