BUCKWHEAT FAMILY 227 



106. E. Thomasii Torr. Scape 1-2 dm. high; leaf -blades orbicular or 

 rounded-ovate, 0.5-2 cm. long; peduncles capillary, 6-12 mm. long; involucres 

 glabrous, turbinate; lobes rounded; outer perianth-lobes oval or elliptic, shorter 

 than the elliptic or oblong inner ones. Desert regions: Ariz. s Utah Calif 

 n Mex. L. Son. Mr-Jl. 



107. E. Gordonii Benth. Scape 2-4 dm. high, slender, glabrous; leaf- 

 blades coriaceous, glabrous, orbicular, 1-3 cm. broad; peduncles 1-3 cm. long, 

 erect; involucres turbinate-campanulate, about 1 mm. long, glabrous; lobes 

 rounded; perianth white or pinkish, 2-2.5 mm. long, glabrous; outer lobes oblong- 

 ovate, the inner oblong, slightly if at all shorter. E. Visheri A. Nels. Dry 

 plains and bad-lands: S.D. Colo. Utah Wyo. Plain Submont. Je-S. 



108. E. subreniforme S. Wats. Scape slender, 1-3 dm. high, more or less 

 silky-pilose or villous, especially at the nodes; leaf -blades rounded-reniform, 

 1-2 cm. wide; peduncles capillary, ascending, 5-20 mm. long; involucres glab- 

 rous, turbinate-campanulate, 1 mm. long; lobes rounded-ovate; perianth rose- 

 colored, glabrous or slightly hispid, 1-1.5 mm. long; lobes subequal, elliptic. 

 Arid regions: Ariz. s Utah N.M. L. Son. 



109. E. trinervatum Small. Scape about 3 dm. high, more or less villous 

 or pilose; leaf-blades suborbicular or rounded-ovate, 1-2 cm. broad, truncate or 

 subcordate at the base, conspicuously 3-nerved; peduncles spreading, 6-15 mm. 

 long, glabrous; involucres campanulate, glabrous, 1-1.5 mm. long; perianth 

 deep-pink, glabrous, nearly 2 mm. long; lobes subequal in length, elliptic or 

 oval, the inner broader. Arid places: Colo. Utah. Son. Submont. Je-Au. 



110. E. nutans T. & G. Scape 1-2 dm. high; leaf-blades orbicular, 1-2 cm. 

 broad, glabrous; peduncles reflexed, 5-10 mm. long; involucres campanulate, 2.5-3 

 mm. long; lobes broadly ovate; perianth rose-colored, 2-2.5 mm. long. E. rubi- 

 florum M. E. Jones. Arid regions: Utah Nev. Son. Je. 



111. E. Parryi A. Gray. Scape about 2 dm. high; blades rounded-reni- 

 form, 1-3 cm. broad; peduncles 5-10 cm. long, spreading or somewhat reflexed; 

 involucres turbinate, oblique, glandular; lobes rounded-ovate; perianth cam- 

 panulate, white, green on the midveins. Arid regions: s Utah s Calif. L. 

 Son. My-Je. 



112. E. glandulosum Nutt. Scape about 2 dm. high; leaf-blades orbicular 

 or reniform, cordate at base, 1-3 cm. broad; peduncles capillary, 1-3 cm. long, 

 spreading or reflexed, abruptly bent above the middle; involucres broadly tur- 

 binate, glabrous, 2 mm. long, deeply cleft; lobes ovate; perianth yellow, 2-2.5 

 mm. long. E. fiexum M. E. Jones. Slopes and hills: Colo. Utah. Son. Je. 



113. E. Ordii S. Wats. Scape 3-6 dm. high; leaf-blades elliptic, 2-4 cm. 

 long; peduncles filiform, 1-2 cm. long, glabrous; involucres turbinate, 1 mm. long; 

 lobes ovate; perianth white, tipped with pink, 2 mm. long. Sand dunes: Ariz. 

 Utah. Son. Ap-Jl. 



114. E. trichopodum Torr. Scape 3-5 dm. high; leaf -blades cordate to 

 oval, subcordate at the base, 1-3 cm. broad, glabrous above, hirsute beneath; 

 peduncles capillary, about 1 cm. long; involucres glabrous, 1 mm. long or less, 

 turbinate; lobes rounded; perianth yellowish, 1-1.5 mm. long. Arid and sandy 

 places: N.M. s Utah Calif.; n Mex. L. Son. Mr-Jl. 



115. E. fusiforme Small. Scape 2-5 dm. high; leaf-blades suborbicular, 

 1-5 cm. in diameter, with scattered hairs on both sides; peduncles capillary, 

 spreading, 1-2 cm. long; involucres turbinate, barely 1 mm. long; lobes ovate, 

 shorter than the tube; perianth white or yellowish; lobes ovate, 1.5 mm. long. 

 Bluffs and sandy places: Colo. Utah -Ariz. Son. My-Je. 



116. E. inflatum Torr. Scape 3-6 dm. high; leaf -blades reniform or orbic- 

 ular, hirsute-pubescent or sometimes glabrate; peduncles 1-3 cm. long, spread- 

 ing; involucres turbinate, glabrous, 1-1.5 mm. long; lobes ovate; perianth 1.5 mm. 

 long, densely pubescent. Arid places: N.M. Colo. Calif. Son. My-Jl. 



117. E. divaricatum Hook. Stem 1-2 dm. high, divaricately branched, 

 minutely pubescent; basal leaves petioled; blades spatulate to orbicular, 1-2 cm. 



