438 COMPOSITE. Troximon. 



Trans. Am. Phil. Soc. 1. c„ a dwarf form. T. taraxacifolium, Nutt. 1. c, a larger form. — 

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

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

 and narrowish-leaved forms to the type of this polymorphous species. 



§ 2. MacroehI-nchus. Akenes with a slender and mostly filiform nerveless 



beak and soft pappus. — Macrorhynchus, Torr. & Gray, Fl. 1. c. Trochoseris, 



Endl. Gen., & Pcepp. & Endl. Nov. Gen. & Spec. iii. 56, t. 263. Troximon in 



part, Stylopappus, Oryptopleura, & Kymapleura, Nutt. Trans. Am. Phil. Soc. vii. 



430, 434. . 



# Perennials,, with akene acute or tapering at summit 



■h- Into a beak not longer or little longer than the cylindraeeous or narrowly fusiform body. 



T. aurantiacum, Hook. Loosely soft-pubescent and glabrate: 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 purple : akehes 

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

 ulous. — PI. i. 300, t. 104. T. roseum, Nutt. Trans. Am. Phil. Soc. 1. c, a small form. Macro- 

 rhynchus aurantiacus, Pisch. & Meyer, Ind. Sem. Hort. Petrop. 1837? M. troximoides, 

 Torr. & Gray, PL ii. 491. — Mountain prairies and banks of streams, northern Rocky Moun- 

 tains to Brit. Columbia and Oregon, perhaps California, and mountains of Colorado. 



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

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

 Macrorhynchus purpureus, Gray, PI. Fendl. 114. — Along Santa Pe Creek, New Mexico, 

 Fendler. A similar form in mountains of Colorado. 



T. gracilens, Gkay. Resembles slender forms of preceding : leaves mostly entire, flaccid, 

 from lanceolate to nearly linear, or some narrowly spatulate : scape 10 to 18 inches high : 

 head and involucral bracts narrow : flowers deep 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, Nevius, 

 Suhsdorfj Brandegee. Rocky Mountains in N. Wyoming, Forwood. 



Var. Greenei, Gkay, 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, Gkay. Resembles broad-leaved forms of T. glaucum, robust : leaves thickish, 

 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 inches high : head broad, an inch or 

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

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

 pappus elatus, Nutt. 1. c. 433. Macrorhynchus elatus, Torr; & Gray, 1. c. M . grandiflorus, 

 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 ; 

 perhaps first coll. by Nuttall. 



T. apargioides, Less. Low and tufted from a multicipital lignescent caudex, glabrate : 

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

 with sparse linear divisions : scapes a span or two high : head half-inch high : involucre 

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

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

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



+- -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 fine, rather flaccid : flowers all yel- 

 low. — Stylopappus, Nutt. 1. u. 



•h- Pappus about the length of the beak, whitish. 



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

 pinnatifid to lanceolate or broader in outline and pinnately parted into linear lobes : scapes 



