GRIFFITHS—THE GRAMA GRASSES. 887 
13. Bouteloua trinii (Fourn.). 
Chondrosium trinti Fourn. Mex. Pl. 2: 136. 1881. A duplicate of the type (Ber- 
landier 1427, Laredo, Texas), in the National Herbarium, and a photograph and frag- 
ment of the type from the herbarium of the Paris Muséum are before me. 
Chondrosium (?) polystachyum Trin.; Fourn. Mex. Pl. 2: 136.1881. This herbarium 
name is given as a synonym of Chondrosium trinii. 
Bouteloua trifida Thurb. in Wats. Proc. Amer. Acad. 18: 177.1883. The type, in 
the Gray Herbarium, is Palmer 1355, Monclova, Coahuila, Mexico, 1880. See also 
U.S. Dept. Agr. Div. Bot. Bull. 12': pl. 46. 1890; U.S. Dept. Agr. Div. Agrost. Bull. 
7: 224 and 225. f. 206 and 207. 1897. 
Bouteloua burkit Scribn. in Wats. Proc. Amer. Acad. 18: 179. 1883; Bull. Torrey 
Club 11: 5. 1884. The type, as considered by Scribner in the latter publication, was 
collected at Laredo, Tex., by 
Mrs. Anna B. Nickels. This 
specimen appears to have 
been destroyed when Scrib- 
ner’s herbarium was burned. 
Berlandier 167, which is the 
first specimen cited by Wat- 
son, probably was burned at 
the same time, at least this 
does not appear to be now 
in the Gray Herbarium. 
Berlandier 1427, cited in the 
original description, is in the 
National Herbarium, Curtiss 
3440* also cited, is in the 
herbarium of the Missouri 
Botanical Garden and the 
National Herbarium. See 
also U. 8. Dept. Agr. Div. 
Bot. Bull. 12!: pl. 36. 1890. 
Watson’s paper @ was pub- 
lished August 23,1883. Here 
he describes B. trifida Thurb., 
basing it upon Palmer 1355, 
| Ay, 
Monclova, Coahuila, Mexico. \y y 
He also lists Parry & Palmer Fi. 41.—Bouteloua trinii. a, Spikelet; b,c, lemma and palet of first 
945 and Wright 749, 2020, and floret; d, rudiment; e, two views and cross section of caryopsis. 
: i a, Scale 7.5; b-e, scale 12.5. From Griffiths 6104. 
2022, and describes B. burkii 
Scribn., basingit upon Berlandier 167 and 1427, and Curtiss 3440. Scribner > publishes 
the same species again. Under B. trifida Scribner lists: ‘Texas and New Mexico; G. 
R. Vasey, Mexico; Dr. E. Palmer No. 1355, 1880.’ Under B. burkit he lists the follow- 
ing: ‘‘ Laredo, Texas; Mrs. Anna B. Nickels; communicated to me by Mr. Isaac Burk, 
of Philadelphia, for whom the species is named. Sandy plains, Upper Concho, West 
Texas; J. Reverchon; No. 3440*, Curtiss’s Distribution North American Plants.” 
In the National Herbarium a specimen collected by Letterman, Laredo, Tex., 
July, 1882, is marked the type of B. burkii, and another collected by G. R. Vasey, 
El Paso, Tex., 1881, the type of B. trifida, both in Scribner’s hand. 
DESCRIPTION. 
_ A variable, low, delicate, cespitose perennial, with comparatively naked culms, 
12 to 15 cm. high, but very variable in size, erect, or, in old, undisturbed plants, 
@ Proc. Amer. Acad. 18: 176-180. % Bull. Torrey Club 11: 5. January, 1884. 
