Orindelia. COMPOSITiE. qqo 



1. A. Fremontii, Gray, 1. c. Shrubby, 1 to 2 feet high : leaves obovate-spatu- 

 late, acummate, slioit : heads sessile in compound corymbose clusters : involucre 

 (l)arely a quarter of an inch long) of 7 to 9 oval and obtuse thinnish scales, the tips 

 of which are obscurely greenish : ray-flower only one, with a short obovate ligule 

 and a pappus nearly as long as its tube, composed of numerous narrow chaffy scales 

 united below into an irregularly cleft cup or crown : disk-flowers about 5, with 

 apparently well-formed but sterile ovary, and a pappus of about 20 flatfish more 

 or less tortuous denticulate-hispid bristles, some of them occasionally united or 

 sparingly hxaucheiX. ~ Amphipappus Fremontii, Torr. & Gray, in Jour. iJost :N'at 

 Hist. Soc. V. 4, & PI. Fremont. 17, t. 9. 



On the Mohave River and in the vicinity of the Colorado, April : found only hy FrcmonL 

 Bunthara and Hooker (Gen. PI. ii. 250), recognizing the affinity of this with Amphiachyris dra- 

 cunculoidcs, refer them both to Guticrrczia ; but it seems preferable to keep up the ^enus Amphi- 

 achyris and refer this pecuHar and rare species to it. ° 



8. GRINDELIA, Willd. Gum-plant. 

 Heads solitary, terminating leafy branches, or occasionally more or leas corymbose, 

 heterogamous with the rays fertile, or in one species homogamous (rayless), many- 

 flowered. Involucre hemispherical or globular, commonly coated with resin or 

 balsam; its scales very numerous, imbricated, narrow, with coriaceous appressed 

 base and slender more or less spreading or squarrose green tips. Receptacle flat or 

 convex, foveolate. Eays numerous, narrow. Branches of the style tipped with a 

 lanceolate or linear appendage. Akenes compressed or turgid, or t'he outermost 

 somewhat triangular, glabrous, truncate. Pappus of 2 to 8 caducous awns or stout 

 corneous bristles. — Biennial or perennial and mostly coarse herbs, with sessile or 

 partly clasping leaves, often viscid or resinous, and middle-sized or rather large 

 heads of yellow flowers ; flowering in summer. — Torr. & Gray, Fl. ii. 246. 



A characteristic genus of the plains west of the Mississippi, extending to the Pacific coast and 

 to Mexico, with two or three species in similar regions of Soutli America, not over a dozen or so 

 m all. But they are difficult of discrimination, especially the western species, which are all dif- 

 ferent from the eastern. Some good characters may be furnished by the ripe akenes, which are 

 known in few species. 



The balsamic resin which exudes from the herbage, most largely from the fonnin'^ heads is 

 used medicinally, especially as a remedy for the effects of Poison Oak {Rhus lobata). liither the 

 bruised plant is applied directly, or a decoction or alcoholic infusion. 



* Stems a foot to a yard high, leafy : leaves from obovate to lanceolate. 



1. Gr. hirsutula, Hook. & Arn. Hirsutely pubescent or sometimes almost tomen- 

 tose with soft spreading hairs, or lower part of the stem glabrous, one to three feet 

 high : leaves sharply and irregularly serrate, from lanceolate to oblong, the lower 

 spatulate, uppermost usually with broad clasping base : awns of the pappus 2 or 3, 

 flatfish, nearly smooth. — Bot. Beech. 147. G. rubricaulis, DC. Prodr. v, 316. 



Under redwoods, &c., from Monterey northward, extending along the coast to Puget Sound. 

 Known by the pubescence, and usually by the red or i)urplish stem : the involucre sometimes 

 tomentose, sometimes almost naked ; the tips of the scales, as in other species, either straight or 

 squarrose. 



2. Gr. glutinosa, Dunal. Glabrous : leaves obovate, olilong, or oblong-spatu- 

 late, rounded at apex, sharply serrate above the middle : scales of the involucre with 

 short tijis : pappus of 5 to 8 rigid flattened chaff-like awns, their thin edges sparsely 

 serrulate-ciliolate. — Aster glutinosus, Cav, Ic. ii. t. 168. 



Sandy moist grounds, on the coast, Fort Point and Lobos Creek, near San Francisco : intro- 

 duced {'.). The original of this species is said to have come Irom Southern Peru (not Mexico), a 

 district which has given not a few plants to the coast of California. 



