PIPER FLORA OF THE STATE OF WASHINGTON. 367 



2. Hedysarum sulphurescens Rydberg, Bull. Torr. Ciul) 24: 2r)l. 1S97. 



Hedysarum favescens Coult. & Fisher, Bot. Ciaz. 18: SOO. 1893, not Kegel & Schmalh. 

 1882. 



Type locality: Helena, Montana. 



Range: British Columbia to Saskatchewan and \Yv()niing. 



Specimens examined: Loomi.s, Elmer 551. 



ARAGALLUS. Locoweed. 



1. Aragallus gracilis A. Nelson, Erythea 7: 60. 1899. 



Type locality: "Limestone Range in the Black Hills, Wyoming." 

 Range: Washington to Montana and Wyoming. 



Specimens examined: Olympic Mountains, £'Zme/" 2532; Loomis, Elmer 595. 

 Professor Greene erects a new species, A. luteolus, on Elmer's 2532. « 



2. Aragallus monticola (A. Gray) Greene, Pittonia 3: 212. 1897. 

 Oxytropis monticola A. Gray,'Proc. Am. Acad. 20: 6. 1885. 

 Type locality: Northwestern Wyoming. Collected by Parry. ^ 

 Range: Washington to Wyoming, Dakota, and Alberta. 



Specimens examined: Olympic Mountains, Grant 21; Fleit 134, 803; Goat Mountains, 

 Allen 245. 



PHACA. Milk vetch. 



Pods membranaceous, thin, much inflated. 



Herbage slightly pubescent ; pods 2-celled LP. lentujlnosa. 



Herbage silky or villous; pods 1-celled. 



Pods very thin, 3 to 5 cm. long 2. P. hookeriana. 



Pods firm, 10 to 12 mm. long 3. P. sulcsdorfii. 



Pods coriaceous or chartaceous, not inflated. 

 Herbage long-hairy \)r woolly. 



Pods woolly or villous, not compressed. 



Pods 1-celled, somewhat curved, soft -woolly. 



Flowers ochroleucous 4. P. pursh ii. 



Flowers purple. 



Stems elongate, prostrate: leaflets 21 to 2.". 5. P. inftexd. 



Stems erect, very short : leaflets 7 to 1 1 6. P. glareosa. 



Pods 2-celled, small, ovate, short-villous. 



Spike dense ; flowers 10 mm. long. 7. P. spaldingii. 



Spike loose ; flowers 6 mm. long 8. P. lyallii. 



Pods glabrous, strongly compressed, falcate 9. P. succumhens. 



Herbage and pods glabrous or short-pube.scent. 



Pods conspicuously stipitate, the stipe equaling or exceeding 

 the calyx. 



Cah'x oblique: pods curved or coiled, the sutures promi- 

 nent. 



Pods coiled, glabrous 10. P. spelrocarpa. 



Pods curved, not coiled. 



Leaflets 5 to 7 pairs, oblong or obovate; stipe as 



long as the calyx 11. P. sinudfa. 



Leaflets 6 to 9 pairs, linear; stipe much exceed- 

 ing the calyx 12. P. podocarjxi. 



Calyx not oblique; pods straight or nearly so. 

 Neither suture of the pods impressed. 



aProc. Biol. Soc. Wash. 18: 17. 1905. 



