402 COMPOSITE AG08ERI8 



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 

 capillary 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 out- 

 line, 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 elonga- 

 ted-lanceolate, laciniate-dentate or commonly deeply pinnatifid with linear 

 lobes: involucre glabrous or glabrate, or the base of the outer of the lanceo- 

 late 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 glabr- 

 ate: spatulate to lanceolate, sinuate-dentate to laciniate-pinnatifid or even 

 pinnately parted: involucre broad, usually well imbricated; its bracts lanatc 

 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 hill- 

 sides, Washington to California. 



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

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

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

 row; all callous-tipped: involucre narrowly oblong, 1^-2 inches high when 

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

 pus: ligules short: achenes 3 lines long: abruptly contracted 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 linear-lanceolate, denticulate to pin- 

 natifid: involucre oblong-campanula te, 6-9 lines high; its bracts erect, lan- 

 ceolate or Borrower; 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. 



