Flaveria. COMPOSITE. 353 



rather small (disk barely half-inch in diameter) : rays rather sparse and narrow, half-inch 

 • or less long, yellow and brownish : teeth of disk-corolla oblong : akenes with rather short 

 and scanty villosity, surpassed by the numerous setiform fimbrilhe. — Proc. Am. Acad. xix. 

 34. G. pulchella, var., Gray, PI. Wright, i. 120, along with plants mentioned as G. lanceo- 

 tea. — Hills of the Kio Frio, S. W. Texas, Wright. (Adj. Mex. to San Luis.) 

 = = Akenes densely long-villous all over: fimbrilla; subulate-setaceous: rays yellow: pedun- 

 cles scapiforin or from short leafy stems, 5 to 10 inches long : some or even all the leaves pin- 

 natiftd, but very variable. 



G. pinnatlflda, Torr. Perennial, cinereous-pubescent : leaves sometimes linear or with 



linear lobes, sometimes spatulate and sinuate or even entire : pappus-palea; lanceolate. 



Ann. Lye. N. Y. ii. 214; Torr. & Gray, 1. c — Plains, W. Texas to Colorado and Arizona; 

 first coll. by James. (Adj. Mex. ) 



G. Arizonica. Annual, greener : leaves less frequently pinnatifid and with only oblong 

 lobes : pappus-palese obovate-oblong, very obtuse or retuse. — High plains of S. Utah and 

 Arizona, Palmer, Parry, Greene, Pringle. Has been confounded with the preceding. 



# # Glabrous or nearly so, thick-leaved, impressed-punctate, low, perennial from a stout multi- 

 cipital caudex: rays and disk-flowers both yellow: bracts of involucre more coriaceous, mostly 

 ovate or oblong and with short herbaceous tips: teeth of disk-corolla short, ovate, obtuse: 

 akenes moderately villous all over. 



G. spathulata, Gray. Hardly a foot high, leafy-stemmed, branched from the base : leaves 

 spatulate, entire, inch long, uppermost gradually smaller : head barely half-inch in diameter : 

 rays few and small : pappus with awns surpassing disk-corolla : fimbrilla; setaceous-attenuate, 

 shorter than the akenes. — Proc. Am. Acad. xii. 59. — Rabbit Valley, Utah, Ward. 



G. acaulis, Gray. Leaves all clustered on the thick caudex, ovate and obovate, somewhat 

 spatulate, contracted into slender petioles, entire or sparingly dentate : scapes a span to a 

 foot high : head larger : rays more numerous, over half-inch long, rather narrow and with 

 narrow lobes: pappus with short awns not equalling the disk-corolla: fimbrillse subulate, 

 shorter than the akenes. — Proc. Am. Acad. xi. 73. — S. W. Utah and adjacent Arizona, at 

 Mokiak Pass, &c, Parry, Palmer. 



161. SARTWfiLLiIA, Gray. (In honor, now in memory, of Dr. Henry 

 P. Sartwell.) — Annuals (of the Texano-Mexican border), glabrous, a foot or two 

 high, leafy, fastigiately branched, and bearing very numerous small heads (only 

 2 lines high) of yellow flowers in corymbiform cymes ; the leaves all narrowly 

 linear or filiform, entire, rather fleshy, opposite, slightly connate at base. — PI. 

 Wright, i. 122, t. 6, & Proc. Am. Acad. xix. 34. — Two species. 



S. Flaveriee, Gray, 1. c. Leaves nearly filiform : pappus a truncate cupule. — S. W. Texas, 



on the Pecos, &c, Wright, Thurber, Havard. 



S. Mexicaxa, Gray, Proc. Am. Acad, xviii. 107, xix. 34 (coll. Palmer in Northern Mexico), 

 has less filiform leaves, and a pappus of nearly distinct palese, with which as many longer delicate 

 awns alternate. 



162. FLAVERIA, Juss. (From Jlavus, yellow; plants used to dye yel- 

 low.) — Glabrous herbs (mainly tropical- American), mostly annuals ; with small 

 and fascicled or glomerate heads of yellowish or yellow flowers, and opposite 

 sessile leaves, the broader ones 3-nerved. Akenes mostly smooth and glabrous. 

 — Gen. 186; Benth. & Hook. Gen. ii. 409. Flaveria & Broteroa {Brotera, 

 Spreng.), DC. Prodr. v. 635. Vermifuga, Ruiz & Pav. Prodr. 114, t. 24. 



§ 1. Involucre 4-1 o-flowered, composed of 3 to 5 principal bracts. 



# Heads more or less clustered in broad and open naked-pedunculate compound terminal corymbi- 

 form cymes: leaves somewhat fleshy: involucre of 5 bracts: corollas except in the last species 

 nearly or quite glabrous. 



F. ohloraefolia, Gray. Glaucous, 1 to 3 feet high: leaves entire, from ovate-oblong to 

 lanceolate, broadest (half to fully an inch broad) and connate or connate-perfoliate at base : 



23 



