212 PROCEEDINGS OP THE AMERICAN ACADEMY 



fruit, it is liable to be confounded with the two succeeding species, but 

 its pubescence is hirsute-silky or villous-silky, not lanuginous ; and the 

 forming legume is canescent with short appressed pubescence. 



Series II. Legumen sutura neutra introflexa plane uniloculare, aut 

 sutura ventrali magis quam dorsalis intrusa. Phaca, L., DC. 



1. Folia pinnato-plurifoliolata, rarius paucifoliolata vel abortu de- 

 foliolata, in nonnullis Homalohis simplicia. 



§ 17. Eriocarpi. Legumen lanosissimum, plerumque sub lana longa 

 copiosissima occultum, breve, turgidum, coriaceum, pi. m. incurvum, 

 acuminatum vel apiculatum, estipitatum. — Brevicaules e radice 

 valida perenni, humifuso-csespitantes, moUissime lanuginosi. Flores 

 elongati, ssepius pollicares, laxe subcapitati ; caljce longe cylindrico. 



53. A. injiexus, Dougl. in Hook. Fl. Bor.-Am. l,p. 151. Lanugine 

 laxa subvillosa cinereo-canescens ; caulibus (6- 12-pollicaribus) difFuso- 

 procumbentibus ; foliolis oblongis ; floribus laste purpureis, carina dentes 

 calycis graciles setaceos laxos paullo superante ; legumine ovato-oblongo, 

 juniore lanosissimo, maturo (in herb. Hook.) subdenudato maxime in- 

 curvo obcompresso suturis utrisque proesertim ventrali impressis longi- 

 tudinaliter interstincto. — Barren grounds along the southern tributa- 

 ries of the Columbia River ; on the Clearwater, Rev. Mr. Spalding, &c. 



— Flowers fully an inch long, evidently purple or violet and showy. 



— This species, copiously collected by Mr. Spalding, with only form- 

 ing fruit, I have variously confounded with the preceding on account 

 of its purple flowers, and with the following on account of the woollier 

 pubescence and the very woolly young pods. But on now comparing 

 these materials with the description of A. injiexus by Sir William 

 Hooker, and with a ripe pod from his herbarium, I think they may be 

 united. From the mature legume it might as well be referred to 

 the foregoing group ; but here it is clearly the ventral suture which is 

 intruded to meet the slightly impressed dorsal suture. 



54. A. PuRSHii, Dougl. in Hook. Fl. Bor.-Am. 1, p. 152. Phaca 

 molUssima, Nutt. in Torr. & Gray, Fl. 1, p. 350. Lanugine laxa sub- 

 villosa cinei-eo-canescens, subacaulis vel humifuso-depressus ; foliolis 

 oblongis ; floribus ochroleucis, carina apice purpurea dentibus calycis 

 subulatis longius superante : legumine ovato (subpollicari) leviter in- 

 curvo, intus baud interstincto, lana persistente flavida. — Western side of 

 the Rocky Mountains, through Utah and the interior of Oregon to the 



