BUCKWHEAT FAMILY 223 



both sides, 2-5 cm. long; involucres tomentose, 3-4 mm. long; lobes ovate; 

 perianth white, glabrous, 3 mm. long; lobes oblong, obtuse, unecjual; fruit sca- 

 brous on the angles. {'!) E. KearneyiTidcst. Dry valleys: Utah. Son. Jl. 



67. E. spathuliforme Rydb. Perennial, shrubby at the base; scape 2-3 

 <lm. high; leaves all near the base, petioled; blades elliptic to spatulate, 2-3.5 cm. 

 long, white-tomentose on both sides, densely so beneath; involucres glabrous, 

 turbinate, 3 mm. long; lobes rounded, scarious and slightly floccose on the mar- 

 gins; perianth white, glabrous; segments equal, obovate. Sandy washes: Utah. 

 Son. Au. 



68. E. Ostlundi M. E. Jones. Scape about 2 dm. high; leaves all near the 

 base, petioled; blades elliptic, 1-1.5 cm. long, floccose above, white-tomentose 

 beneath; involucres turbinate, 2.5 mm. long, glabrous; lobes oval, scarious- 

 margined; perianth white or pink; segments obovate. Clay banks: Utah. Son. 

 Je-Au. 



69. E. lonchophyllum T. & G. Caudex with leafy branches, 1 dm. long 

 or more; leaf-blades 6-10 cm. long, densely white-tomentose beneath, loosely 

 floccose or glabrate above; inflorescence elongate, 2-3 dm. long, glabrous; invo- 

 lucres 3 mm. long, glabrous, turbinate; perianth-lobes oval or obovate, round. 

 E. irasatchense M. E. Jones. Plains and hills: Colo. — N.M.— Utah. Son. — 

 Subniont. Jl. 



70. E. nudicaule (Torr.) Small. Stem scapiform, 1-2 dm. high; leaves 

 short-petioled ; blades 3-5 cm. long, white-tomentose beneath, floccose or some- 

 times glabrate above, mostly revolute; involucres campanulate, 3-4 mm. high, 

 glabrous; perianth-lobes cuneate-obovate. E. effusum nudicaule Torr. Plains 

 and hills: Kans. — Tex. — Utah. Son. — Submont. Jl-Au. 



71. E. scoparium Small. Stem scapiform, 1-2 dm. high, glabrous; leaves 

 petioled; blades linear to linear-spatulate, 2-5 cm. long, revolute, densely white- 

 lanate beneath, floccose above; involucres 2.5-3 mm. long, and almost as wide; 

 lobes broad; perianth becoming 3.5-4 mm. long; lobes oblong or obovate. Plains 

 and valleys: Colo.— N.M. Submont. Jl-S. 



72. E. grangerense M. E. Jones. Stem scapiform, 1-3 dm. high; leaves 

 petioled; blades revolute, densely white-tomentose beneath, permanently white- 

 floccose above, 4-6 cm. long, 2-4 mm. wide; involucres turbinate, 3 mm. long, 

 glabrous; lobes triangular, acute; perianth campanulate, glabrous, 2 mm. long; 

 lobes elliptic, obtuse. E. confcrtifolium Stansburyi Benth. Barren hills: Wyo. 

 — Utah. Son. 



73. E. tristichum Small. Stem scapiform, 1-3 dm. high; leaves nearly 

 basal, s/hort-petioled; blades 2-7 cm. long, floccose above, densely white-tomen- 

 tose beneath; involucres 2.5-3 mm. long; lobes broad, rounded, much shorter 

 than the tube; perianth becoming 4 mm. long; lobes obovate or oblong-obovate. 

 Plains and valleys: Colo. — -N.M. Submont. Je-S. 



74. E. salicinum Greene. Stem scapiform, 3-4 dm. high; leaves near the 

 base, short-petioled; bkules about 4 cm. long, densely white-tomentose beneath, 

 loosely floccose and glabrate above, 3-4 dm. long; involucres broadly turbinate- 

 campanulate, 3 mm. long, with 5 rounded teeth; perianth about 2 mm. long; 

 lobes oval, obtuse. Canons: Colo. Subniont. Jl. 



75. E. Fendlerianum (Benth.) Small. Low shrub, 1-5 dm. high, with 

 tomentose branches; leaves short-petioled; blades oval to oblong, 2-4 cm. long, 

 5-18 mm. wide, densely white-tomentose beneath, loosely floccose above; inflo- 

 rescence 0.5-2 dm. high, floccose when young, soon glabrous, with ascending 

 branches; involucres deeply-turbinate, sparingly floccose or glabrate; lobes 

 rounded, scarious-margined ; perianth campanulate, 3.5-4 mm. long; lobes un- 

 equal, the outer oval, slightly longer than the elliptic inner ones. E. microthecum 

 Fendlerianum Benth. Plains: Colo. — N.M. Son. Au-0. 



76. E. divergens Small. Low shrub, 3-6 dm. high, with densely white- 

 tomentose branches; leaves short-petioled; blades oval or elliptic, 1-2.5 cm. long, 

 densely white-tomentose beneath, loosely floccose above; inflorescence 1-5 cm. 



