PIPER FLORA OF THE STATE OF WASHINGTON. 351 



Commonly 20 to 30 (rarely 40) cm. high; flowers somewhat 

 larger; keel 9 to 11 mm. long. 



Pods 15 mm. long; flowers subsessile 8. L. lepidus. 



Pods 20 to 25 mm. long; pedicels about 3 mm. lon^. 



Keel ciliate 9. L. piperi. 



Keel not ciliate 9a. L. pi.peri imberbis. 



Stems leafy. 



Plants dwarf, scarcely 20 cm. high, somewhat cespitose; pedicels 



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



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 11 . Z,. albicaul-is. 



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 sea' ccly exceeding the buds ... ..... 12. L. leueophyUus. 



Bracts linear-filiform, plumose, much longer than 



the buds 12a. L. leueophyUus plur- 



mosus. 

 Slender; silky pubescence very line and closely ap- 

 pressed. 



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



Leaflets elliptic-oblanceolate, rounded and mucro- 



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



hlyophyllus. 

 Pedicels well developed; racemes relatives loose. 



Standard glabrous 14. L. suksdor/ii. 



Standard more or less pubescent dorsally. 



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



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 16. L. ornatus. 



Bracts much exceeding the larger buds 16a. L. ornatus bractea- 



tus. 

 Stems several, slender, subsimple from a thick- 



ish caudex 17. L. alpicola. 



§ 3. Saxosi. — Perennials; leaflets green on both 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 subsymmetrical at the base ; corolla blue or purple vary- 

 ing to white. 

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



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

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



cm. long 20. L. saxosus. 



