COMPOSITAE (composite FAMILY) 599 



1331; AgSdris agrestis Xisterh. Bull. Torr. Bot. Club 28: 645. 1901; A^rose(da 

 Rydb. 1. c.)—Thrbughou!t our range and northward and westward. 



3a. Troximon glaucuip dasycephaluin T. & G. Fl. 2: 490. 1843. "This 

 plant differs froin T . glaucuifi' on\y in having a pubescent involucre. It is 

 scarcely worth nomenclatural' Recognition." (C. V. Piper in Contrib. XJ. S. 

 Nat. Herb. 11:' 542^ 1906.) {Agoseris scorzoneraef olid Greene, Pitt. 2: 177. 

 1891,; A.dUissima Rydb. Mem. N. Y. Bot. Card. 1: 458. 1900.)— Same range 

 as the spepifes,' 



36. Trdzimdn glaucum jpiunilum (Nutt.) A. Nels. A low, tufted form 

 usually with narrow and often with'laciniately-toothed leaves: involucre more 

 6t less pubeaeeht. f. gla%u:urri lahiriiahimm part. {T..pumilum Nutt. Trans. 

 Am. Phil. Soc. 7: 434. 1841; Agoseris LeorUodon Rydb. 1. c. 457.) — Colorado 

 to Montana and the Dakotas. 



'ii Troximpn 'parvifldrtlin Nutt. 1. c. Caudex multicipital, the ha,rrowly 

 linear or broader and lanceolate leaves strictly 2-ranked, thus subtending the 

 more or less decumbent scapes; whole plant nearly or quite glabrous: bracts of 

 the involucre nearly equal, all lanceolate-acuminate: heads and achenes niuCh 

 shorter than in the last, the latter almost beakless: pappus less flaccid and 

 more nearly approacMn'g thd deciduous; ' T. glaucum pamflorum. — Colorado 

 and Utah to Montana and th^ Dakotas. 



"'5. Tfoximpn arachhoideum (Rydb.) A. Nels. Dwarf, the few stems from 

 the crown or crowns of the rather slender root only 7-20 cm. high: lea,ves 

 iiibgtiy lanceolate in outline but laciniaie-pinnatifid with linear divisions, or 

 in the sma:ller forms linear and entire, more or less cinereous or lanate-pubes- 

 cent: rays of the rather small heads yellow, often purplish externally or in 

 drying: the body, , 'the beak, and the pappus of the acherie each about 5 mm. 

 long. T. glaucum laciniatum in part (not T. laciniatum Gray. Proc. Am. 

 Acad, 19: 71. 1883; Agos^i^ladniata Greene, 1. c. 178; yl. arachnoidea'Rydh. 

 BuU. Torr. Club S: 511. 1 90 l).^Open slopes, middle elevation; in our range 

 and west to the Sierras. 



6. TroximonaurantiacumHook.Fl.Bor.Am. 1: 300. pi. 104. 1833. Nearly 

 glabrous^ deep green arid not at all glaucous: leaves oblanceolate, obtuse, en- 

 tire, narrowed to a short petiole: involucre 16-20 mm. high; the bracts broadly 

 to narrowly lanceolate, acute, or the outer and looser ones oblong and obtuse: 

 flowers orange, drying brownish or purple: achenes thickish, tapering gradually 

 to a short, stout beak. {Agoseris carnea Rydb. Mem. N. Y. Bot. Gard. 1: 

 458. 1900.)— rMouptain parks; from our range to the coast states. 

 ' 7. Troximon purpt^'eiUJiL (Gray) A'. Nels. Sparsely lanate when young, in 

 a,ge glah,i;ate, more or less glaucous; scapes 2-5 dm. high, enlarged and tomgn- 

 ,^ose-,,at the summit: leaves, ; linear tp, lanceolate, saliently or often runci- 

 nately toothed or lobed: bracts of the involucre moderately well imbricated, 

 ip-26,mm. long, lanceolate and, long-acuminate, or the outer ones oblong' and 

 cbtuse,:, , cprolJa'S: deep saflfrf^-colpr, drying purple: achenes black, fusiform, 

 vyith a 'pjender beak about as long as the body: pappus white, (Macro- 

 rhynchus purpureiis Gray, Pi. Fendl. 114. 1849; T. gradlens Gray, Proc. Am. 

 Acad. 19: 72. 1883; Agoseris Greenei Rydb. as to our range.)^Cplprado to 

 Montana and westward. 



8. Troximon arizpnicum Greene, Pitt. 2: 78. 1890, About 3 dm. high, 

 slender,, ^glabrpu^ except a woolliness under, the involucre: leaves narrowly 

 oblanceolate, entire or" runcinately toothed: head about 25 mm. high, few- 

 flowered, more than 25 mm. broad when expanded; invohicral bracts in two 

 spries, the outer oblong, the inner lanceolate, all purple in the middle: ligules 

 hght yellow: beak of the achene very much attenuate, longer than the body; 

 pappus fragile and deciduous. (Agoseris elongata Greene; A. rostrata and A. 

 humilis Rydb. Bull. Torr. Bot. Club .32:, 137. 1905.)— Colorado to New 

 Mexico and Arizona. 



. 9. Troximon elatum (Nutt.) A. Nelsl Robust, scapes 2^5 dm. high: leaves 

 thickish, lanceolate to, spatulate, sparingly dsntate to pinnatifid, 2-3 dm. 

 long, glaucOjUs: ,he3,ds 25-30 trim, high and broad; involiiqrs,! bracts lanceo- 

 late, acute, morte or less pubescent: corollas yellow: achene thickish, 6 mm. 



