PIPER FLORA OF THE STATE OF WASHINGTON. 349 



Zonal distribution: Ilumid Tiansition. 



Allen's 59 is considered a distinct subspecies by Professor Greene, Osmaronia cerasiformis 

 nigra,a based principally upon the drupes wliicii seem to lack the usual glaucous coating. 



FABACEAE. IJeax P\\mily. 



Stamens 5, monadelphous: leax cs pinnate Petalostemum (p. 350). 



Stamens 10. 



Filaments distinct ; leaves trifoliolate Tmermopsis (p. 349). 



Filaments united, either monadelphous or diadelplious, 9 and 1 . 

 Anthers of two forms, round and oblong. 



Leaves digitate with 5 to 11 leaflets; oins iierl)s Lupinus (p. 3.t0). 



Leaves with .solitary leaflets: spiny slu-ul) Ulex (p. 358). 



Anthers all alike. 



Leaves digitate, or if pinnate tiieii trifoliolate. 



Pods curved or coiled: flowers in spikes. MEnicACJo (p. .363). 



Pods straight. 



Flowers in long racemes Melilotus (p. 358). 



Flowers in heads or head-like innbels Trifolium (p. 358). 



Leaves pinnate: leaflets mostly more than 3: no ten- 

 drils. 

 ^ Herbage dotted with conspicuous glands. 



Leaflets 3; pods not spin}- Psoralea (p. 363). 



Leaflets many; pods spiny Gi.ycyrrhiza (p. 364). 



Herbage not dotted with conspicuous glands. 

 Leaves unequally pinnate, not tendril bear- 

 ing. 



Flowers umlwllate or solitary: pods ■' 



linear Hosackia (p. 364). 



Flowers spicate or racemose, rarely 

 solitary, then pods not linear. 



Pod a loment Hedysarum (p. 366). 



Pod not a loment. 



Keel of tlie corolla acute or 



subulate at apex Aragallus (p. 3(J7). 



Keel of the corolla ol)tuse at 



apex Phaca (p. 367). 



Leaves aljruptly ]iinnate, usually tendril- 

 bearing. 



Style filiform, hairy only near the tip. . ViciA (p. 374). 

 Style flattened, hairy on the inner side. Lathyrus (p. 375). 



THERMOPSIS. 



1. Thermopsis montana Nutt.: Torr. & Gr. Fl. 1: 388. 1810. 



Type locality*: "High valley's of the Rocky Mountains, in bushy places by streams, near 

 the line of Upper California." Collected by Nuttall. 



Range: Washington to Montana and Ari/.ona. 



Specimens examined: Walla Walla region. Biandet/ee 695. 



This or the following was referred to T. fahncea (Pall.") DC. by Hooker. 6 



la. Thermopsis montana ovata Robinson, subsp. nov. 

 Leaflets broader than in T . montana, ovate. 

 Range: ISorth Idaho and adjacent Washington and Oregon. 



a Greene, Pittonia 5: 309. 1905. ^ Fl. Bor. Am. 1: 128. 1838. 



