GRINDELIA. COMPOSI P^ 295 



18. • Bucephalus. Pappus copious the bristles unequal : achenes oblong, 

 compressed, villous: perennial herbs without radical leaves. 



19. Oreastruiii. i appus a single series of brownish scabrous barbellate 

 bristles : achenes subterete, 5-s-costate : acaulescent perennials with nar- 

 row entire leaves and scapiform monocephalous branches. 



20. Machieranthera. Pappus a single series of rather rigid unequal 

 bristles: achenes narrowed downward, compressed, few-nerved, the 

 faces somewhat striate: leafy-stemmed, branching biennials or annuals. 



21. Erlgeroii. Pappus scanty and fragile: achenes small, mostly 2-ner- 

 ved : annual or perennial herbs. 



SuBTKiBE III. BAOoHARiDEiii. Heads discoid and unisexual. 

 Corolla of the fertile flowers filiform. 



22. Baccharis. Pappus copious, of fine and soft bristles, accrescent 

 after flowerii g: achenes compressed, 5-lu costate; shrubby or herbac- 

 eous perennials. 



Subtribe 1, Homochromese, Gray Sya. Fl 1, Pi. 11, 52. Dish 

 wholly of hermaphrodite flowers, of the same color as the ray when that 

 is present, mostly yellow: these corollas tubular with more or less am- 

 pliate throat and 4-6-lobed limb Receptacle not chaffy. flat or mere- 

 ly convex. Involucre closely imbrico,te. mostly in, sfveral series 



3 GRINDELIA Willd. Mag. .Mat. Rerl .18'i7, 2o9. (Gum Plaxt.) 



Perennial bieniiiiil or sufl'i uteseent plants with entire or ser- 

 rate, somewhat pellucid-punctate oi- reticulate leaves the radical 

 oue-i usuiiliy spatiilate ; the canine sepsile or partly clasping; 

 and middle-sized or large heads of yellow flowers terminating 

 the branches. Herbage balsamic-viscid, heads many-flowered. 

 Involucrehsniispherical or subglobose ;the scales imbricated, in sev- 

 eral series. Receptacle flat, foveolate Corolla of the ray ligu- 

 late, pistillate or neutral, in a single series ( in one species want- 

 ing ) ; of tiie disk tubular infundibuliform, .5-toothed, perfect: 

 branches of the style linear, rather acute, the hairy appendages as 

 long as the stigmatic portion. Achenes obovate or oval, some- 

 what angled, glabrous. Pappus of 2-8 caducous nearly smooth 

 awns or corneous bristles. 



G. Integrlfplia I'O. Prodr v, 415 Stems rather stout, 1-3 feet high, 

 usually corymbosely branched above and bearing several or numerous 

 heads: pubescence soft villous sometimes sparse or none; leaves of 

 soft texture, commonly entire, sometimes ser ate, cauline 3-4 inches long, 

 mostly tapering from a broad base to an acute or acuminate apex : radical 

 spatulate and obtuse: heads large, naked or surrounded by foliaceous 

 b' acts passing into leaves: bracts of the involucre with mostly elongated 

 setaceous subulate points to the bracts : achenes truncate and with an ir- 

 regular undulate or obscurely 3-5 toothed border around the terminal 

 are la; pappus awns stout, flattish. Along swales and ditches. Brit- 

 ish Columbia to Oregon west of the Cascade Mts Flowering in 

 summer 



-1 



<x Henderson! Greene Pitt ii, 18. Flowering terns erect, a foot 

 high, sparsely hirsute: leaves (on sterile basal branches) 6-8 inches 

 long, blade oblanceolate, closely dentate or serrate, tapering to a 



