372 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
found them growing intermixed. This still further goes to prove the close relationship 
of the two species and really throws a doubt upon the validity of B. hirticulmis. My 
own collection from western Jalisco illustrates the same close relationship. Indeed, 
frequent gradations may be found between this and B. hirsuta in the mountains north- 
west of Guadalajara. In the vicinity of Aguascalientes the species has less hairy 
culms, as shown by some of my own distributions. Further collections from the 
Pacific coast of Mexico, from Lower California to the Isthmus are necessary. 
HERBARIUM SPECIMENS. 
Mexico, Brandegee, FE] Tase, Lower California. Nelson 3121 (in part), Chiapas; 1259, 
Valley of Oaxaca, Palmer 201, Rio Blanco, Jalisco. 
6. Bouteloua hirsuta Lag. 
Bouteloua hirsuta Lag. Var. Cienc, 24:141. 1805. My interpretation of this is 
based upon the description and upon a specimen sent by Lagasca to Munich in 1820, 
A specimen in the herbarium of the Madrid Botanical Garden marked B. hirsuta in 
Lagasca’s hand has both B. hirsuta and B. gracilis on the same sheet. This, however, 
is not the type, for that was burned in Lagasca’s first herbarium. The spike of 
B. hirsuta from this specimen before me is very large and represents the largest of our 
southern forms of this species. The Munich and Madrid specimens appear to be from 
the same collection. See also U. 8. Dept. Agr. Div. Bot. Bull. 121: pl. 39. f. 1-3. 
1890; Britt. & Brown, Illust. Fl. 1:180. f. 472. 1896; U.S. Dept. Agr. Div. Agrost. 
7: 223. f. 205. 1897. 
Bouteloua hirta ““H. R. M.”’a Lag. Var. Cienc. 24: 141.1805. A garden name 
mentioned as a synonym of Bouteloua hirsuta; B. hirta Scribn.b is based on Chon- 
drosium hirtum H. B. K. 
Chondrosium hirtum H. B. K. Nov. Gen. & Sp. 1: 176. pl. 59. 1816. The plate 
identifies this without doubt, although the species normally bears 2 to 4 spikes, not 
one spike as figured and described. 
Actinochloa hirsuta Roem. & Schult, Syst. Veg. 2: 419. 1817. Based upon Bou- 
teloua hirsuta Lag. 
Eutriana hirta Trin. Gram. Unifl. 240. 1824. Based upon Actinochloa hirsuta Roem. 
& Schult. 
Atheropogon hirtus Spreng. Syst. Veg. 1: 293. 1825. Based upon Chondrosium 
hirtum H. B. K. 
Chondrosium hirsutum Sweet, Hort. Brit. 1: 455. 1826. A name only. 
Atheropogon papillosus Engelm. Amer. Journ. Sci. 46: 104. 1843. The descrip- 
tion is sufficient to identify this. The type, in the Engelmann Herbarium, is Geyer’s 
specimen collected near Beardstown, Illinois, in 1842. A specimen so named cor- 
responding to this description in the Gray Herbarium further identifies it. This is 
mounted on the same sheet as Mead’s specimen from Mason County, Illinois, collected 
August 25, 1845. 
Chondrosium aschenbornianum Nees, Linnaca 19: 692. 1847. The type is Aschen- 
born Exsic, no, 331. The specimen of this in Willdenow’s herbarium is Bouteloua 
hirsuta, Fournier has listed many numbers from Mexican collectors under this name 
but all others examined from whatever source are B. gracilis. Asan illustration of the 
mix up, my notes on Bourgeau’s no. 448 are interesting. In the National Herbarium 
B. gracilis and B. hirsuta are found under this number on the same shect. In the 
Gray Herbarium, and the herbaria at Paris and at the St. Petersburg Botanical Garden, 
this number is B, gracilis, while a duplicate of the type in the Willdenow Herbarium 
is B. hirsuta. 
@1,e., Hortus Regius Matritensis. Contr. Nat. Herb. 2: 531. 1894. 
