398 PROCEEDINGS OF THE AMERICAN ACADEMY 



half long) and the apparently larger corolla also (fully 4 lines long 

 when well developed, and richly colored) lead to the conclusion that 

 this is a distinct species. 



Astragalus Auizonicus : {Micrantki?) procumbens, sufFrutes- 

 cens, pube strigulosa canescens ; stipulis parvulis petioli basi adnatis ; 

 foliolis 5 - 7-jngis linearibus acutis ; spicis in pedunculo folium super- 

 ante sparse plurifloris ; floribus subsessilibus ; calycis dentibus subu- 

 latis tubo carapanulato ajquilongis ; corolla albida sursum purpurea, 

 carina apice inflexo producto obtaso ; leguminibus immaturis oblongo- 

 linearibus estipitatis cano-puberulis pi. m. obcompressis septo completo 

 bilocellatis pleiospermis. — Arizona, near Camp Grant, April, Dr. 

 Edward Palmer. Probably same as the plant from Tubac, Dr. Parry, 

 and Los Nogales, Capt. E. K. Smith, mentioned at the end of my 

 revision of the genus (p. 234). But Dr. Palmer's specimens are less 

 white, the calyx with some dark hairs intermixed, and the flowers 

 smaller ; those in Capt. Smith's specimens are half an inch long, in 

 both too large to be properly ranked among Micranthi. The inflexed 

 and almost beak-like but obtuse summit of the keel is nearly as in A. 

 Sonorce and A. humistratus. 



Astragalus (Phaca) Palmeri : cinereo-puberulus, glabratus ; 

 caule ultrapedali ; stipulis brevissimis ; foliolis 8-13-jugis oblongis ; 

 spicis in pedunculo folium superante strictis laxius multifloris ; bracteis 

 subulatis pedicello brevissimo sequalibus ; calycis dentibus subulatis 

 tubo campanulato fere {squilongis corolla purpureo-cerulea dimidio 

 brevioribus ; leguminibus arrectis estipitatis puberulis plano-compressis 

 semi-ovatis, suturis acutis hand introflexis, ventrali medio 5-7-sperma. 

 — Camp Grant, in Southern Arizona, Dr. Edward Palmer, comra. 

 En^elmann. Base of the stem not seen. Leaflets 6-9 lines long. 

 Spike 4-5 inches, flowers 3 lines, legumes half an inch in length. 

 From the fruit it should be placed with the Homalobi, but the habit is 

 rather different, and the pod very broad 



Astragalus Hornii (Phaca, Injlati) : caule erecto (ut videtur 

 bipedali) glabro ; stipulis minimis subulatis discretis mox reflexis ; 

 foliolis multijugis oblongo-linearibus adpresse pilosulis ; pedunculis 

 folia aquantibus capitato-plurifloris ; floribus fere sessilibus ; calyce 

 corolla tlavida rectiuscula dimidio brevioribus, dentibus subulatis tubum 

 brevi-campanulatum suba^quantibus ; leguminibus (pro sectione parvu- 

 lis) arete capitatis estipitatis brevi-ovatis acuminatis pilosis inflatis 

 10 - lo-spermis. — Near Fort Tejon, or in Owen's Valley, Tulare Co., 



