216 



POLYGOXACEAE 



^cape strongly inflated under the first node. 115 E fusiformp 



or none, branches ascending; scape usually inflated. 



116. E. inflatum, 



XVIII. DiVARICATA. 



Leaves green, puberulent; involucres 5-cleft usnallv «?p«<!i1^ ii7 h^ ^a«„^a„»4 

 Leaves floccose beneath; involucres 5-toothed ped^cled ' 118 E. ingulZT 



-^„^ . XIX. PUBERULA. 



One species. 



119. E. puberulum. 



SPERGULIlffA 



Leaves peen. merely pilose; scape glandular. 190 E 'inprmiiinum 



Leaves tomentose beneath; scape finely pubescent. 12?: K Tn?nnT.nI!^; 



One species. ^^^- Salsuginosa. 



121. E, pharnaceoides 



122. E. salsuginosum. 



1. E. alatum Torn Stems erect, 3-10 dm. hieh* leaves mnstiv h^^f*] 

 X S rS'"'' '' oblanceolate, 3-10 cm. long/hirsutf abovTglabrus^^^^^^^^^ 

 n3lt? ^^^^^S midrib; panicle open; involucres in smaU cymes; perianth cam^ 

 panulate greenish yellow, 2 mm. high, glabrous; achenes 5-7 mm. long glab- 

 rous. Plains and tab p-RnHs- Vt^K t'^^ a„:J w.„ o... ^,.^'h. 



Je-Au. 



Plains and table-lands: Neb.— Tex.— Ariz.— Wyo. Son.— Plain 



2. E. triste S. Wats. Stems 3-5 dm. high, sparingly hirsute or trlabrate- 

 ilabrou^'tS' ^''"'' «blanceoIate, 8:-10 cm. lon|,'cilfate o^ ^margins oTrwise 

 nlnnS ''^^"/'^^f^^^'^e paniculate; mvolucres in cymes; perianth flabrous, cam- 

 panu ate, 2 mm. long, brownish red; achenes 5-6 mm. long. E. alatum glabrius- 

 culum Torr. Sandy soil: Tex.-^ Colo.— s Utah— Ariz. ^Son.—Mon^ 



3. E. Jamesii Benth. Stems decumbent at the base, 1-3 dm. high tomen- 



^reei, Tn^ r^'K^T^' ^f ^^¥' ^-\^^- ^^^^^ blades eiliptic-spatufate, thick, 



f^l'.i l^ white-tomentose beneath; involucres deeply campanulate, 5 mm 

 & *^™^^\«^«*^; perianth 4-5 mm., becoming 7-8 mm. long; inner lobes slightly 



h^nf T^r If """^""r^ achenes,4 mm long, pubescent at the base. Plains^nd 

 hills. iex.—Kans.— Colo.— Ariz. Plain—Mont. Jl-S. 



9 nt*Tr,^in^!t^®'^^ ^""tT; ^*T^ scapiform, 1-3 dm. high; leaves basal, petioled, 

 2-5 cm. long, somewhat tomentose above, but in age more glabrate and greenish 



sSv'l^llouf "*r?'"'''''i^'^*^' '"^^^"^r^ campanulateNomentose; perianth 

 silky-villous. E Jamesii flavescens S. Wats. E. vegetius (T. & G.) A. Nels. 



Hills: Wyo.—N.M.— Ariz.— Utah. Submont.—Mont. 



1p«v;«^'.*?^**.^?^^o^?^- ^^1^™^ scapiform, about 1 dm. high, tomentose; 

 InJ!nf^ k' ^^\'^^< 2-0 cm. long, tomentulose but greenish above, white- 

 tomentose beneath; involucres tomentose; perianth 6-7 mm. long, silky below. 

 Mountains: Colo.^Utah. Suhmont.—Subalp. Jl. , 



r^^h^' f^Pn" Greene. Stems scapiform, 1-3 dm. high, villous; leaves basal, 

 petioled 3-10 cm. long; blades thm, oblanceolate or elliptic-oblanceolate, green 

 and villous above white-tomentose beneath; perianth yellow, 5-6 mm. long, 



l«.l;?A-?*'^?'i^''o-.^*^"^^ ^-^ ^"^^ ^'S^' scapiform, white-tomentose; 

 InTff «;h ' P'^*'- ¥'- ^~^ '"V '^^S' ^^^^^^ oblanceolate, deAsely tomentose on 

 both sides, greenish in age above, snowy-white beneath; perianth yellow; fila- 

 ments villous at the base; achenes 4 mm. long, villous. / smce«/pursh E. 



cra^sifohus Benth Dry hills, mountains and canons: Man.-Neb.-Colo.- 

 Alta. Plain — Subalp. 



i«o,L?' <=hloranthum Greene. Stems scapiform, 1-2 dm. high, tomentose: 

 leaves basal not very thick, petioled, 3-5 cm. long; blades oblanceolate, some- 

 what tomentose, but green above, white-tomentose beneath; perianth orange or 

 greenish orange. .& aur.wm Nutt not M. E. Jones. E. fiavum A. Nels , in 

 part. Mountams: Colo.— Wyo. Suhalp. Jl-Au. 



T,, jL?5;.^f ^^^"V™ ^Itf-J ^*?.™^ scapiform, 1-1.5 dm. high; leaves basal, 

 numerous, 1-3 cm. long; blades .villous but green and glabrate above, densely 



