10 Contributions from the Gray Herbarium 
More material of this species is needed from the region of the 
type before the constancy of the short, branched inflorescence can 
be fully established. The specimen from Montana has fruits 
which are exactly the same as those of Jones’ plant but the racemes 
are greatly elongate and do not originate so near the base of the 
plant. 
owt 12. A. aARENARIA Suksd. Deutsche Bot. Monats. xviii. 133 
(1900). A. hispidissima Suksd. |. ec. A. retrorsa Suksd. 1. ¢. 134. 
A. micrantha Suksd. 1. ¢. A. intermedia Piper, Contrib. U. 8. Nat. 
Herb. xi. 480 (1906), in part, not F. & M. — Washington and 
sandy soil, Nez Perces Co., May, 1892, Sandberg (Mo. Bot. Gard.). 
OREGON: near Hood River, May 23, 1894, Suksdorf, no.2316; 
Sala? 1886, Brandegee. Wasuincton: west Klickitat Co., 
ay, 1882, Suksd dorf; Columbia River, west Klickitat Co., May 3, 
9, 22, 1891, Suksdorf, nos. 2007 and 390; also May 38, 5, 22, nos. 
994 and_995, apy 
This species is variable in size of corolla and nutlets and in degree 
of pubescence — characters upon which Mr. Suksdorf recognizes 
three additional species. In some cases these variations are con- 
siderable but the collections all come from the same region and 
indubitably, it seems to me, represent only one species genetically. 
The small flowered condition (A. micrantha) suggests A. parviflora 
but this resemblance is, I believe, superficial, and therefore in no 
manner affects the validity of the latter species which is a native of 
California and uniformly, even in an introduced state, has very 
pale as well as small corollas. Indeed the true relationship of A. 
arenaria is more probably with A. Douglasiana or one of its 
relatives. 
Watson, no. 846; Sulphur Baths, May 23, 1908, Mrs. Joseph 
Clemens; Huntsville, July 25, 1909, cf. Smith, no. 1944 (R. Mt. 
Herb.). Catirornta: Los Gatos, Santa Clara Co., April 30, 1908, 
Heller,-no_ 8936; also Alum Rock Park, no. 8470; Marysville 
Buttes, Sut er Co., fetid 6, 1914, Heller, no. 11364; Oroville, 
Butte Co., ‘April 1,4 13, Heller, no. 10725; nce Chico, 1914, no. 
