402 COMPOSITAE AGOSERis 



A. apargioides Greene 1. c. Troximon apargioides Less. Low and 

 tufted from a multicipital caudex, glabrate : leaves spatulate, obtuse, 2-3 

 inches long, narrowed below to a slender petiole, entire or with a few 

 salient teeth or lobes, or pinnatifid with sparse linear divisions : scapes 6-12 

 inches high : heads half-inch high : involucre campanulate ; the inner bracts 

 linear-lanceolate, the outer oblong, acute, more or less tomentose : achenes 

 and beak each about 2 lines long: pappus soft, dull-white. Sandy soil 

 along the coast of Oregon and California. 



* * Achenes oblong or short-fusiform, with a filiform or almost cap- 

 illary beak 2-4 times as long : pappus soft and fine : flowers all yellow. 



*' Pappus about as long as the beak. 



A. hirsuta Greene 1. c. Troximon humile Gray. Scapes 8-20 inches 

 high, slender : leaves hirsutely pubescent, from lanceolate to spatulate in 

 outline, and from repand-dentate or lyrate-pinnatifid to pinnately parted 

 into linear lobes ; involucre permanently villous : flowers exserted : filiform 

 beak only about twice as long as the whitish achene, Near the coast, 

 Washington to California. 



■^ ■'" Pappus white, much shorter than the almost filiform beak. 



A. laciniata Greene 1. c. Troximon laciniatum Gray. Smooth and 

 glabrous or with sparse soft pubescence : scapes 1-2 feet high : leaves elon- 

 gated-lanceolate, laciniate-dentate or commonly deeply pinnatifid with 

 linear lobes : involucre glabrous or glabrate, or the base of the outer of the 

 lanceolate bracts tomentose : achenes 2, and beak 5-7 lines long. In low 

 ground, Vancouver Island to California. 



A. grandiflora Greene 1. c. 178. Troximon grandiflorum Gray. 

 Scapes stout, 1-2 feet high : leaves hirsutely or cinereous-pubescent, or 

 glabrate : spatulate to lanceolate, sinuate-dentate to laciniate-pinnatifid or 

 even pinnately parted : involucre broad, usually well imbricated : its bracts 

 lanate or tomentose when young, often glabrate in age : heads in fruit 1-1% 

 inch high : achenes 2, and capillary beak 6-8 lines long. Plains and moist 

 hillsides, Washington to California. 



A. retrorsa Greene 1. c. Troximon retrorsum Gray. Villous-tomen- 

 tose when young : scapes stout, 12-18 mches high : leaves pinnately parted 

 into linear-lanceolate usually retrorse lobes, the terminal lobe long and 

 narrow; all callous-tipped: involucre narrowly oblong. l%-2 inches high 

 when mature : its linear-lanceolate bracts hardly surpassed by the soft 

 white pappus: ligules short: achenes 3 lines long: abruptly conti acted at 

 summit; their filiform beaks 10-12 lines long. Open pine woods, southern 

 Oregon to California and southern Idaho. 



§ 3 Achenes fusiform, with filiform nerveless beak and soft pappus: 

 subcaulescent annuals with yellow flowers. 



A. heterophylla Greene 1. c. Troximon heterophyllum Greene. Some- 

 what villous, or hirsutely pubescent or glabrate : scape-like peduncle 3-12 

 inches high : leaves from spatulate to hnear-lanceolate, denticulate to pin- 

 natifid : involucre oblong-campanulate, 6-9 lines high ; its bracts erect, lance- 

 olate or narrower; the outer decidedly shorter than the glabrous inner 

 ones, more or less pubescent but not villous : achenes various, but at most 

 only 2 lines long, usually fusiform; beak 3-4 lines long, mostly longer than 

 the white or whitish pappus. Open places, Brit. Columbia to California. 



Var. glabra. Glabrous throughout and more or less glaucous-: small, 

 2-4 inches high. Hillsides near the Columbia river, eastern Oregon and 

 Washington. 



