PIPER FLORA OF THE STATE OF VrASHINGTON. 351 



Commonly 20 to 30 (rarely -10) cm. liigii: flowers somewhat 

 larger; keel 9 to 11 mm. long. 



Pods 15 mm. long; (lowers subsessile _ S. L. lepidus. 



Pods 20 to 25 mm. long: pedicels about 3 mm. 1 )ng. 



Keel ciliate 9. L. piperi. 



Keel not ciliate 9a. L. piperi imherhis. 



Stems leafy. 



Plants dwarf, scarcel3-20 cm. high, somewhat cespitose: pedicels 



slender, in anthesis 4 to 8 mm. long 10. L. suhsericeus. 



Plants not dwarf. 



Decumbent or procumbent; maritime species IS. L. littoralis. 



Erect, tall, 4 to 12 cm. high, not maritime. 



Keel narrow, bent almost at right angles, early exposed 

 for much of its length; pubescence of stem and leaves 



inclining to velvety rather than silky 1 1 . Z. alhicai/Jls. 



' Keel broader, only moderately falcate, the tip only ex- 

 serted. 

 Flowers subsessile in dense spiciform racemes. 



Stout; silky pubescence somewhat coarse, shaggy 

 and inclining to spread. 



Bracts sca'ccly exceeding the buds 12. i. Icucopliylhin. 



Bracts lineai-filiform, plumost', inucii longer than 



tlie buds 12a. L. Iciicophyllui; plu- 



mosus. 

 Slender; silky pubescence very fine and -iosely ap- 

 pressed. 



Leaflets oblanceolate, acute or acuminate 13. Z. canescens. 



Leaflets eUiptic-oblanceolate, rounded and mucro- 



nate at the apex 13a. L. canescens am~ 



hlyophyUus. 

 Pedicels well developed ; racemes relatives loose. 



Standard glabrous 14. L. suksdoijii. 



Standard more or less pubescent dorsally. 



Pubescence of the stem loose and spreading 15. L. sericens. 



Pubescence of the stem appressed. 



Stem stout, usually solitary, branching freely; 

 caudex not much thickened. 

 Bracts scarcely or not at all surpassing the 



larger buds 10. L. oniaftis. 



Bracts nmch exceeding the larger Inids l(ja. L. ornatus hractea- 



fus. 

 Stems several, slender, subsimplc from a thick- 



ish caudex 17. L. alntcola. 



§ 3. Saxosi. — Perennials; leaflets green on Ijotii surfaces, glab- 

 rous or villous above, villous beneath; hairs long and loose, 

 not so numerous or closely appressed as to give a silky luster ; 

 calyx subsjmimetrical at the base ; corolla blue or purple vary- 

 ing to white. 

 Dwarf, 20 to 30 cm.liigh; keel distinctly ciliate. 



Flowers small, few, in loose racemes; petals less than 1 cm. long. 19. L. volcaiiicus. 

 Flowers larger, numerous, in a rather dense raceme; petals 1.5 



cm. long 20. L. saxosus. 



