1918] SCHNEIDER—SALIX 27 
TYPE LocaLiry.—Probably Texas, exact locality unknown to me (coll. 
Berlandier). 
RANGE.—Central Texas to New Mexico (Dona Ana County) and north- 
eastern Mexico (Coahuila and Nuevo Leon). 
SPECIMENS EXAMINED (from Mexico).—State of Coahuila: Jimulco, by 
Streams, alt. 1300 m., October 10, 1905, C. G. Pringle (no. 10086, m.; N., W:; 
‘a medium sized tree””).—State of Nuevo Leon: Monterey, along the stream 
through city, May 1891, C. K. Dodge (no. 132, m.; M., W.; looks somewhat 
like var. angustissimaXS. taxifolia). 
This willow seems to me very closely related to /ongifolia and apparently 
Connected with it by intermediate forms. I donot regard it asa distinct species, 
but I cannot agree with Wooton and STANDLEY, in Contrib. U.S. Nat. Herb. 
19:160 (Fl. N.Mex.). 1915, that “S. Thurberi Rowlee is a form [of exigua] with 
longer leaves that are noticeably dentate,” and that ‘‘it is not essentially differ- 
ent from S, exigua”’ as understood by these authors. The main difference of 
var. angustissima from typical longifolia is the absence of a dorsal gland in the 
male flowers and the dense silvery silky (shining) pubescence of the young 
Ovaries. The leaves of the fertile branchlets are up to 4-8 cm. long and 1. 5-5 
mm. wide. The dentation and nervation are those of typical longifolia. 
RowLee made a mistake in attributing all his specimens of Thurbey 
(nos, 2368, 95, and 2341 in the Gray Herb.) to G. Thurber. Only no. 95 was 
collected by Thurber, while nos. 2 341, 2368 are numbers of Berlandier and 
have been cited by ANDERSSON with nos. g11 and 3019 as the co-types of his 
var. angustissima, a fact not mentioned at all by RoWLEE. 
There is a sterile specimen from the state of Durango, alluvial valley of 
Rio Nazas, April 14, 1847, J. Gregg (no. 442; M.), which may belong to our 
ead The young leaves measure up to 7 cm. in length and 6 mm. in 
th. 
There remains another specimen of a willow of this section from Lower 
California, ?Causito, May 20, 1883, C. R. Orcutt (no. 1180, fr.; M.; dis- 
tributed as longifolia), which possibly represents the form called S. Parishiana 
y Row1ee in Bull. 1. c. 249. Unfortunately I have not yet had the oppor- 
tunity to examine the types of RowLEE’s species, collected by F. W. Hobby in 
Southern California, San Bernardino County, Matilija Canyon (nos. 54, 55). 
Species intermediate between exigua and sessilifolia leucodendroides, differing 
from the latter in the narrower, more glabrescent leaves and the shorter and 
slenderer fruiting aments, and from the former in the longer, narrower, more 
linear lobes of the stigma mostly borne by a short style. Orcutt’s specimen has 
short old fruiting aments measuring not over 2 cm. in length and 8 mm. in 
thickness, According to RowLEE’s statement in his description, the aments 
ere '2-3,cmn, long by 1-2 cm.,” but in the key he says ‘“‘aments medium size, 
3 €M. or more in length.” oa 
