RYDBERG: NOTES ON FABACEAE—I 183 
to that of H. strigulosus, made H. Clementis a variety of A strag- 
alus tenellus. He had evidently not seen the type or a duplicate 
of the type of H. Clementis, but had seen specimens of Baker 
489 from Marshall Pass, Colorado, which evidently belong to 
H. Clementis. In our specimen of this number the pods are 
very immature, but a closer examination would have shown 
Macbride that Baker’s plant and Standley 4181 were not the 
same. In the type of H. Clementis the pods are half broader 
than in A. Standleyi, distinctly black-hairy and tapering at 
both ends, but the stipe if any is only a fraction of a millimeter 
long, i. e. the pod is subsessile; the corolla also is much larger. 
Baker 489 also has black-hairy pods. 
12. HOMALOBUS ACERBUS (Sheld.) Rydb. Mackride re- 
duced this species to Astragalus tenellus forma acerbus, but had 
evidently seen no specimens of it. M. E. Jones has referred 
the type of A. acerbus in the Columbia Herbarium to A. winga- 
tanus and expressed his views in print.* as follows: “Astragalus 
acerbus seems to be identical with A. Dodgeanus Jones, and the 
latter is not surely separable from A. wingatensis lwingatanus|.”’ 
In H. tenellus and its closer relatives the corolla is ochroleucous 
(not a very important character); the racemes, together with 
the peduncles, seldom overtop the leaves to any estent; the 
pods are decidedly veiny; and the plants are inclined to blacken 
in drying. In H. acerbus, on the other hand, the corolla is 
white or purple-tinged; the racemes are twice to four times as 
long as the leaves; the venation of the pods is indistinct; and 
the plants show no inclination to blacken. The following 
specimens belong here:— 
CoLorapo: Glenwood Springs, 1893, es Pieces 
Osterhout 4282; Grand Junction, 1895, M. E. Jon 
13. HomaLospus DopGEanus (M. E. Jones) Rydb. At 
present I have no authentic specimens of this species before me 
but, according to my memory, it is very closely related to H. 
acerbus, and Jones, as shown above, regards the two as identical. 
In fact Jones’s own specimens, determined by him as Astragalus 
Dodgeanus, from Grand Junction, collected May 22, 1895, 
represent H. acerbus and are here listed under that species. 
* Proc. Calif. Acad. II. 5: 636. 1895. 
