196 PROCEEDINGS OP THE AMERICAN ACADEMY 



turis utrisque sulcatis subdidymum. Ovarium etiam glaberrimum. — 

 Plains of Nebraska to the western borders of Texas. 



10. A. BiGELOVii, Gray, PI. Wright. 2, p. 42. Legumen coria- 

 ceum, magis turgidum, ovaU-oblongum (semipollicare), dense lanosum, 

 suturis parum sulcatis. — Western borders of Texas, New Mexico, and 

 near Chihuahua. — Nearly resembles the foregoing, except in the 

 ovary and the legume. 



§ 5. Vliginosi. Legumen coriaceum, turgidum, oblongum, tex'es, nee 

 antice vix postice sulcatum, septo perfecto bilocellatum, fere 

 rectum, estipitatum. — E radice perenni elati (sesqui-tripedales), 

 pube adpressa subcinerei vel glabrati. Spicse densiflorjB. Flores 

 viridulo-albidi vel ochroleuci, nunc purpureo lurido tincti, per an- 

 thesin patentissimi seu deflexi, sed legumina (semipollicaria) in spi- 

 cam confertam ai^ecta. Stipulte a petiolo liberae, nunc discretse, 

 nunc in eadem stirpe adversus folium coadunataj. 



[A. ULiGiNOSUS, L. Bracteis ovato-lanceolatis longe acuminatis 

 calycem superantibus, et legumine postice longitudinaliter impresso 

 (vix canaliculato) a Canadensi differt. — This Eastern Siberian species 

 was recognized by Pallas as a form or analogue of the following.] 



11. A. Canadensis, (Tourn.) L. A. Carolinianus, L. A. ortho- 

 carpus, Dougl. in herb. Hort. Soc. Elatus ; bracteis subulatis calyce 

 brevioribus ; ovario glaberrimo ; leguminis sutura dorsali baud im- 

 pressa, ventrali prominente costceformi. — Canada and Saskatchawan 

 to Louisiana and the interior of Oregon. Occurs with short and also 

 with longer and slender calyx-teeth, the former chiefly eastward. 



12. A. MoRTONi, Nutt. in Jour. Acad. Philad. 7, p. 19. A. spica- 

 tiis 4" (ex char.) A. tristis, Nutt. in Torr. & Gray, FI. Minus altus ; 

 bracteis ovatis vel lanceolatis calyce brevioribus ; ovario pubescente ; 

 legumine {A. spicati, Nutt.), pube tenui excepto, A. Canadensi simil- 

 limo. — Rocky Mountains, Wyeth, Nuttall. Of A. Mortoni we have 

 in herbaria only one or two incomplete flowering specimens ; of A. 

 spicatus a fruiting specimen, apparently of the same species. Except 

 for the cinereous-pubescent ovary and legume I should refer them 

 probably to A. Canadensis. 



§ 6. Onohrychides. Legumen coriaceum, oblongum seu ovatum, rec- 

 tum, scepius pi. m. compresso- vel obcompresso-trigonum, semper 

 postice sulcatum vel exaratum (sectione transversali obcordata vel 

 e dorso biloba), sutura intrusa bilocellatum, pubescens, locellis 



