GRINDELIA. COMPOSITE 295 



18. Eucephalus. Pappus copious the bristles unequal : acheues oblong, 

 compressed, villous: perennial herbs without radical leaves. 



19. Oreastrum. ! 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. Maelnerauthera. 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. Erigeron. Pappus scanty and fragile : achenes small, mostly 2-ner- 

 ved : annual or perennial herbs. 



Sibtribe in. Saccharides. Heads discoid and unisexual. 

 Corolla of the fertile flowers filiform. 



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

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

 eous perennials. 



Subtribe 1, HomocKromeas, Gray Syn. Fl 1, Pi. 11, 52. Disk 

 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 %-5-lobed limb. Receptacle not chaffy. flat or mere- 

 ly convex. Involucre closely imhri.fin.tf>. mostly in several series 



3 GRINDELIA Willd. Mag. Nat. Berl 1807, 259. (Gum Plant. 



Perennial biennial or snffi utescent plants, with entire or ser- 

 rate, somewhat pellucid-punctate or reticulate leaves the radical 

 ones usually spatu late ; the canine sessile or partly clasping; 

 and middle-sized or large heads of yellow flowers terminating 

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

 Involucre hemispherical 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 the 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 

 awn- or corneous bristles. 



G. integrifolia DC. Prodr v, 415 Steins 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 

 spatu late 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, flatfish. Along swales and ditches Brit- 

 ish Columbia to Oregon west of the Cascade Mts Flowering in 

 summer. 



G Hendersoui Greene Pitt ii, 18. Flowering sterns erect, a foot 

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

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



