438 COMPOSITE. Troximon. 



Trans. Am. Phil. Soc. 1. c, a tlwarf form. T. taraxacl/olium, Nutt. 1. c, a larger form. — 

 Dakota to Saskatchewan and to near Arctic coast, soutli to the mountains of Colorado, west 

 to the Sierra Nevada and Wasliington Terr, on the mountains. Passes through smoother 

 and uarrowish-Ieaved forms to the type of this polymorphous species. 



§ 2. Macrorhynchus. Akenes with a slender and mostly filiform nerveless 

 beak and soft pappns. • — MacrorJajnchus, Torr. & Gray, Fl. 1. c. Trochoseris, 

 Endl. Gen., & Pocpp. & Eiidl. Nov. Gen. & Spec. iii. 5G, t. 2G3. Troximon in 

 part, Stylopappus, Cryptopleura, & Kijiaapleura, Nutt. Trans. Am. Pliil, Soc. vii. 

 430, 434. 



* Perennials, with akcne acute or tapcrhig at summit 

 4— Into a benk not longer or little longer tliau the cylindraceous or narrowly fusiform body. 



T. aurantiacum, Hook. Loosely soft-pubescent and glabrato: leaves from linear-lan- 

 ceolate to spatulate, thinnish, entire, or sparingly laciniate-dentate, occasionally pinnatifid : 

 scape from a span to a foot or more high : involucre oblong to campanulate, 7 to 9 lines 

 high ; its bracts from broadly to narrowly lanceolate and acute, or outer and looser ones 

 oblong and obtuse : flowers orange, commonly changing to brownish red or pur])le : akenes 

 thickish, 3 or 4 lines long, and the firm beak only 2 or 3 lines long: pappus somewhat rigid- 

 ulous. — Fl. i. 300, t. 104. T. roseum, Nutt. Trans. Am. I'hil. Soc. 1. c, a small form. Macro- 

 rhynchus auruntiar.us, Fisch. & ]\Ieyer, Ind. Sem. Ilort. Petrop. 1837 1 M. troximoidcs, 

 Torr. & Gr.ay, Fl. ii. 491. — Mountain prairies and banks of streams, northern Rocky JMouu- 

 tains to Brit. C'olumliia and Oregon, perhaps California, and mountains of Colorado. 



Var. purpureum, Gieay. Leaves apparently thickish, laciniate, and with the purple- 

 tinged involucre very glabrous or glabrate: " flowers purple." — Proc. Am. Acad. xix. 72. 

 Macrorhynchus purpureas, Gray, PI. Fendl. 114. — Along Santa Fc' Creek, New Mexico, 

 Fcndltr. A similar form in mountains of Colorado. 



T. gracilens, Gu.vy. llesembles slender forms of preceding : leaves mostly entire, flaccid, 

 from lanceolate to nearly linear, or some narrowly spatulate : scape 10 to IS inches higli : 

 head and involucral bracts narrow : flowers deej) orange : akenes fusiform-linear, 3 or 4 lines 

 long; the very slender beak 4 or 5 lines long: pappus soft, but not flaccid. — Proc. Am. 

 Acad. xix. 71. — Cascade Mountains of Oregon and Washington Terr., Lyall, Nevins, 

 Siilsdnrf, Drandegre. Rocky Mountains in N. ^yyoming, Forwood. 



Var. Greenei, Gray, 1. c. A dubious form, smaller : leaves narrowly linear, with a 

 few linear lobes. — N. California, in Scott Mountains, Siskiyou Co., in dry open ground at 

 about 7,000 feet, Greene. 



T. Nuttallii, Gray. Resembles broad-leaved forms of T. ghmcum, robust : leaves tliickish, 

 from spatulate to lanceolate, from sparingly dentate to pinnatifid, a span to near a foot long 

 (the thick midrib nervose when dry): scape 6 to 20 inclies high: head broad, an inch or 

 more high : involucre more or less pubescent : flowers yellow : tliickish akene and beak each 

 3 or 4 lines long. — Proc. Am. Acad. ix. 216, & Bot. Calif, i. 438 (exck pL Nevius). Stylo- 

 pappus clatus, Nutt. 1. c. 433. Macrorhynchus elatus, Torr. & Gray, 1. c. M. grand ijlorus, 

 Eaton, Bot. King Exp. 206. Troximon aurantiacum, Gray, Bot. Calif. 1. c, as to Calif, 

 plant. — Low or moist ground, Oregon, and the Sierra Nevada in California to S. Utah ; 

 perhajis first coll. by Nuttull. 



T. apargioides, Less. Low and tufted from a multicii)ital ligncscent caudex, glabrate : 

 leaves linear or narrowly lanceolate, entire or with a few salient teeth or lobes, or jiinnatifid 

 Avith sparse linear divisions: scapes a span or two high: head half-incli high: involucre 

 campanulate; outer bracts at least pubescent: akenes and beak each 1| to 2 lines long: 

 pappus soft, dull white. — LinuEea, vi. 594; Gray, Bot. Calif. 1. c, partly. — Sandy soil on 

 and near the coast, San Francisco Bay, &c., California; first coll. by Chamisso. 



•1— -i— Beak slender-filiform or almost capillary, 2 to 4 times the length of the short-fusiform or 

 oblong akene (this rarely over 2 lines long) : pappus soft and line, rather flaccid: flowers all yel- 

 low. — Stylopappus, Nutt. 1. c. 



++ Pappus about the length of the beak, whitish. 



T. humile, Gray. Leaves hirsutely pubescent, from spatulate and repand-dentate or lyrate- 

 piuuatifid to lanceolate or broader in outline and piuuately parted into linear lobes : scapes 



