235 



intus septo eompleto bilocellato, sulco dorsali angiisto subclause, stipite 

 e calycis tubo baud exserto. 



Legumes an iuch and a quarter or shorter in length, 2.J to 3 lines wide, 

 the well-developed ones decidedly falcate ; the partition about twice the 

 length of the depth of the groove, which in the cross-section before de- 

 hiscence is oval and almost closed. — Asa Gray. 



Animas Yalley, 7,000 feet altitude. 



Astragalus Robbinsii, Gray, var. (?) occidentalism Watson. 



Animas Valley, 9,000 feet. 

 Astragalus humillimus, new species. 



Cfespitoso-depressus, condensatus ; caudice lignescente ; caulibus 

 vix pollicaribus stipulis scariosis coalitis imbricato-tectis, petiolis per- 

 sistentibus hystricosis ; foliolis 3-5 jugis oblongis canescentibus mar- 

 gine revolutis (lineam longis) demum deciduis ; pedunculis brevibus 1-3 

 floris; calycis dentibus subulatis tubo oblongo-campanulato dimidio 

 brevioribus; corolla pallida; legumine ovato-coriaceo albopubescente 

 parvo (lin. 2 longo) uniloculari 9-ovulato fere monospermo, suturis extus 

 prominnlis. 



Habit oi A. jejunus, Watson, but much more dwarf and condensed ; 

 petioles and rhachis more spinescent an.d persistent; pod decidedly dif- 

 ferent. — Asa Gray. 



Growing upon sandstone-rock of the Mesa Yerde, near the edge ot 

 the Mancos OaGon. 



Astragalus Haydenianus, new species. 



A. hisulcato afSnis, minor, pube magis cinerea ; spica elongata vir- 

 gata; floribus multo minoribus (lin. 3-4 longis); calycis dentibus subu- 

 latis tubo multo brevioribus ; corolla alba, carina tantum apice purpu- 

 reo-tincta ; legumine ovali utrinque obtusissimo venis transversis rugu- 

 loso 6-7-ovulato 2-4-spermo, facie ventral! late profundeque impressa 

 sutura costccformi valde prominente percussa, stipite calycem baud su- 

 perante. 



Also collected on Grand River, Middle Park, by H. N. Patterson. A 

 striking species, with slender stems 2 or 3 feet high ; dedicated to the 

 director of the Survey, and one of the oldest, most indefatigable, and 

 distinguished explorers of the whole Eocky Mountain region. — AsA 

 Gray. 



The flowers of this species have the peculiar disagreeable odor of 

 those of A. hisulcaUis. 



Southwestern Colorado, between Parrott City and the Mancos, 8,000 

 feet. 



Astragalus Pattersoni, new species. 



Scytocarpi, robustus, 1-2-pedalis, adpresso-puberulus, nunc glabellas ; 

 foliolis 5-10-jugis oblongis crassiusculis (semipoll. ad pollicem longis) ; 

 pedunculis racemoso-plurifloris folium aBquantibus vel superantibus ; fl.o- 

 ribus ultra semipollicaribus mox pendulis ; calycis dentibus setaceo-sub- 

 ulatis tubo cylindraceo dimidio brevioribus ; corolla alba, carina apice 

 nunc purpurascente ; legumine ovali crasso-coriaceo inflato glabro 

 {sajpius poUicaril polyspermo, basi intra calycem abrupte coutracta sub- 

 .stii)itiformi, suturis nee intrusis nee extus prominnlis. 



The only flowering specimens seen were collected by Mr. H. N. Pat- 

 terson, for whom it is named, in the foot-hills of Gore Mountains, Col- 

 orado. 



Fruiting specimens were also abundantly collected by L. H. Ward in 

 Powell's exploration. — Asa Gray. 



