BUCKWHEAT FAMILY 221 



long, floccosc; teeth triangular; perianth pinkish, 1.5 mm. long; segments oblong; 

 fruit glabrous. Hills: Mont. Submonl. Je-Jl. 



49. E. multiceps Nees. Scape 5-15 cm. long, white-tomento.se; leaves 

 slender-petioled, 3-<S cm. long, densely white-tomentose on both sides, with ap- 

 pressed tomentum; blades from linear-oblanceolate to spatulate; inflorescence 

 capitate or rarely umbellate; bracts subulate, or sometimes one or more of them 

 elongate and foiiaceous; involucres tubular-campanulate, tomentose, 3-4 mm. 

 long; lobes triangular; perianth-lobes oblong or cuneate-oblong, rounded. E. 

 gnaphaloides Benth. Dry plains and "bad-lands": Sask. — N.D. — Neb. — ^Colo. 

 — Ida. Plain — Submonl. Jl-Au. 



50. E. villiflorum A. Gray. Scape 2-4 cm. long, silky-tomentose; leaves 

 crowded at the end.s of the short branches, oblanceolate or spatulate, acute, 

 white-silky on both sides, revolute-margined, 6-10 mm. long; bracts linear or 

 subulate; involucres camjmnulate, 3-4 mm. long; lobes 6-8, oblong; perianth 

 campanulate, white, sericeous without; lobes oblong, subequal. Arid places: 

 s Utah. Sou. 



51. E. elatum Dougl. Stem scapiform, branched, 3-10 dm. high, glabrous; 

 leaves basal, long-petioled, 1-2 dm. long; petioles and midvein hirsute, ferrugin- 

 ous; blades ovate, oblong-ovate, or lanceolate, cordate, truncate, or cuneate at 

 the base, softly villous-pubescent on both sides, almost velutinous beneath, 7-15 

 cm. long; involucres in small capitate clusters at the ends of the branches, or 

 sometimes sohtary in the forks; involucres campanulate, 3 mm. long, repandly 

 5-dentate; perianth campanulate, 3 mm. long, pubescent below; lobes oval. 

 Dry gravelly soil: Wash. — ^Ida. — Nev. — CaHf. Son. Jl-Au. 



52. E. polifolium Benth. Stem 3-6 dm. high, more or less tomentulose; 

 leaves fasciculate, on short lateral branches, oblanceolate, 1-2 cm. long, sparingly 

 villous above, white-tomentose beneath, shghtly revolute-margined; peduncles 

 1-1.5 dm. long, tomentulose; involucres campanulate, pubescent, about 3 mm. 

 long, with 5 broadly triangular teeth; perianth campanulate, pubescent at the 

 base and along the midveins, white or pinkish; lobes oval. Dry places: Calif. — 

 Utah — Ariz. L. Son. My-Au. 



53. E. niveum Dougl. Stems 2-4 dm. high, leafy below; leaves ovate or 

 oblong, white-tomentose; inflorescence tomentose, di- or tri-chotomous; bracts 

 foiiaceous, oblong; involucres sessile, villous, turbinate; lobes triangular, acute; 

 perianth glabrous, 3-4 mm. long; inner perianth-segments cuneate. Hills and 

 plains: Ore. — Ida. — B.C. Son. — Submonl. My-Au. 



54. E. dichotomum Dougl. Stem 2-3 dm. high, trichotomous; ultimate 

 branches short; leaves near the base, petioled, 2-8 cm. long; blades spatulate 

 or elliptic, white-floccose on both sides, or glabrate above; branches short; 

 bracts minute, subulate; involucres cylindro-campanulate; lobes triangular, 

 obtuse; perianth glabrous, 3 mm., or in fruit, 5-6 mm. long; inner lobes cuneate 

 or spatulate. Dry places: Wash. — ^Mont. — Ida. Son. — Submonl. Je-Jl. 



55. E. lachnostegium (Benth.) Rydb. Scape floccose, 1.5-3 dm. high, 

 triehotomously branched; leaves petioled, 2-4 cm. long; blades eUiptic or spatu- 

 late, white-tomentose on both sides; bracts minute, subulate; involucral lobes 

 triangular; perianth white or straw-colored, turning pink, glabrous, 3 mm. long, 

 or in fruit longer; inner lobes oblong, longer than the outer. E. slriclum lachno- 

 slegium Benth. Dry benches and hills: Mont. — Ida. Submonl. Jl-S. 



56. E. strictum Benth. Stem about 3 dm. high; leaves near the base, 

 petioled; blades oval, elliptic or spatulate, 1-4 cm. long, glabrate in age above, 

 densely white-tomentose beneath; inflorescence mostly trichotomous; involucres 

 3-4 mm. long, almost columnar, angled; lobes lanceolate; perianth white, glab- 

 rous, 3.5-4 mm. long; segments unequal, the outer broadly oval, the inner nar- 

 rower, cuneate-elliptic, slightly longer. Hillsides: Ore. — Ida. — Wash. Son. 

 Je-Jl. 



57. E. aureum M. E. Jones. Shrubby, 3-10 dm. high; leaves short-peti- 

 ioled; blades 1.5-3 cm. long, densely woolly-tomentose beneath; peduncles 3-6 

 cm. long, loosely tomentose; inflorescence with spreading branches; involucres 



