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 narro wish-leaved forms to the type of this polymorphous species. 



2. MACRORHYNCHUS. Akenes with a slender and mostly filiform nerveless 

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

 Endl. Gen., & Poepp. & Endl. JS T ov. Gen. & Spec. iii. 50, t. 2G3. Troximon in 

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

 430, 434. 



* Perennials, with akcne acute or tapering at summit 

 ) Into a ber.k not longer or little longer than the cylindraceous or narrowly fusiform body. 



T. aurantiacum, HOOK. Loosely soft-pubescent and glabratc : leaves from linear-lan- 

 ceolate to spatulatc, thiunish, entire, or sparingly laciniate-dentate, occasionally piuuatifid : 

 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 : akeues 

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

 ulous. Fl. i. 300, t. 101. T. rusenm, Nutt. Trans. Am. Phil. Soc. 1. c., a small form. Macro- 

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

 Torr. & Gray, Fl. 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, laciuiate, and with the purple- 

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

 Macrorhynckus purpureus, Gray, PL Fendl. 114. Along Santa Fe Creek, New Mexico, 

 Fendler. A similar form in mountains of Colorado. 



T. gracilens, GRAY, llesembles 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 Lnvolucral 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., Lijall, Nevius, 

 Suksdorf, Brandegee. Rocky Mountains in N. Wyoming, 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. f/laucum, robust: leaves thickish, 

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

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

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

 3 or 4 lines long. Proc. Am. Acad. ix. 210, Bot. Calif, i. 438 (excl. pi. Nevius). Sti/lo- 

 piil>pns elatits, Nutt. I.e. 433. Macrorhynchus clatus, Torr. & Gray, 1. c. M. grundiflorus, 

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

 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 lignesccnt 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 H to 2 lines long: 

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

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



H -t 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 : llowers all yel- 

 low. Stylopappus, Nutt. 1. c. 



H- Pappus about the length of the beak, whiti>h. 



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

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



