872 CARDUACEAE 



with green tips. Rays yellow, 1-3, short. Disk-flowers few, yellow. Achenes 

 nattish and broad, 5-nerved. 



1. P. pumila (Nutt.) Greene. Stem strict, erect, 1-2 dm. high, glabrous: 

 leaves rigid, Imear-oblanceolate, 3-nerved, somewhat punctate, resiniferous, 5-10 

 cm. long; cyme glomerate-fastigiate, flat-topped; heads 5-8-flowered, oblong, 

 about 8 mm. high; hgules 1-3, 2 mm. long; achenes glabrous. Solidaao pumila 

 JNutt. Dry mountains: Wyo.— Tex.— Ariz.— Ore. Son.—Submont. Jl-Au. 



27. EUTHAMIA Nutt. Bushy or Fragrant Goldenrod. 



Perennial caulescent herbs with elongated rootstocks. Leaves alternate 

 narrow, more or less triple-ribbed. Heads numerous, in broad corymbs Invo- 

 lucres oblong; bracts imbricate, narrow, glutinous; receptacle pubescent or 

 hbriliate. Kay-flowers pistillate, usually more numerous than the disk-flowers, 

 with inconspicuous hgules. Disk-flowers perfect; corollas yeUow. StAle-branches 

 vvith lanceolate appendages. Achenes broadened upwards, pubescent. Pappus 

 of long equal bristles. ^^ 



Outer bracts broader than the inner, wliich are obtuse. 1 E camnnrnm 



Outer bracts narrow, all acute; lateral ribs of the leaves rather prominent '^""^^'"^""^• 



2. E. occidentalis. 



1. E. camporum Greene. Stem 3-5 dm. high, puberulent-scabrous on the 

 angles above; leaves linear, triple-veined, but the lateral veins often glabrous or 

 nearly so on both sides, scabrous-puberulent on the margins; outer bracts ovate. 

 acutish, the inner oblong-linear, more or less green-tipped; achenes strigose. 

 Closely related toE. gramimfoha (L.) Nutt., of the East. Low ground: Man.— 

 Kans. — Colo. — Alta. Plain. Jl-0. 



2. E occidentalis Nutt. Stem 5-20 dm. high, glabrous, striate; leaves 

 Imear, triple-vemed glabrous, obsoletely scabrous on the margins; bracts nar- 

 K^Jh ^^^/^'^.^^te- thin, ciholate ; achenes sparingly hairy. Solklago occidentalis 

 Nutt. Moist ground: Alta.— N.M.— Calif.— B.C. Plain. Je-N. 



28. OLIGONEURON Small. Rough Goldenrod. 



Perennial caulescent, usually balsamic herbs. Leaves alternate. Heads 

 corymbose, radiate Involucres several-flowered, campanulate; bracts imbricate 

 n several series, thickish, longitudinally few-ribbed; receptacle pitted. Ray- 

 flowers pistillate; hgules yellow. Disk-flowers usually perfect; corollas yellow, 

 the tube dilated into a short throat. Anthers obtuse at the base. Style-branches 

 la bristle? appendages. Achenes several-nerved. Pappus of many capil- 



1. O. canescens Rydb. Stem 5-7 dm. high; basal leaves long-petloled • 

 blades oval 7-12 cm. long, thick, yellowish canescent on both sides, crenulate' 

 upper stem-leaves oval, sessile; inflorescence corymbiform but much congested' 

 heads about 1 cm. high; bracts oblong, canescent; achenes slightly hairy above 



29. MONOPTILON T. & G. 



Depressed dwarf annuals. Heads solitary, terminal. Involucres hemi- 

 spheric; bracts narrow, numerous in a single series, somewhat herbaceous Cv- 

 flowers numerous, pistillate and fertile; ligules white or violet S-flouws 

 numerous, perfect ; corollas yellow. Style-branches with triangular appencWes 

 Achenes oblong-obovate, compressed. Pappus of a short cuiishaned Eil w 

 crown and a single a^^-n, which is barbellate or plumose toSsThe fpexl 



M. bellidiforme 



2-4 



mm 



, leuves spaiuiate^ or imear-spatulate, &-10 mm. long hirsute' 



V 



