Flaveria. COMPOSITiE. 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 : akeues with rather short 

 and scanty villosity, surpassed by the numerous setiforni fimbrilla;. — J'roc. Am. Acad. xix. 

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

 lata. — Hills of the Rio Frio, S. W. Texas, Wrujkt. (Adj. Mex. to San Luis.) 

 =: = Akeues densely long-villous all over: fimbrillse subulate-setaceous: rays yellow: pedun- 

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

 natifid, but very variable. 



G- pinnatiflda, Tokr. Perennial, cinereous-pubescent : leaves sometimes linear or with 

 linear lobes, sometimes spatulate and sinuate or even entire: jjappus-paleix; 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, gi-eener: leaves less frequently pinnatifid and with only oblong 

 lobes : pappus-palea; obovate-obloug, very obtuse or retuse. — High jjlains of S. Utah and 

 Arizoua, Palmer, Parnj, Greene, Princjle. Has been confounded with the preceding. 



* * Glabi-Qus 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 afoot high, leafy-stemmed, branclied from the base : leaves 

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

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

 shorter thau 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-iuch long, rather narrow and with 

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

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

 Mokiak Pass, &c., Parr//, Palmer. 



161. SARTWELL.IA, Gray. (In honor, now in memory, of Br. Hennj 

 P. Sartwell.) — Annuals (of the Texano-Mexican border), ghibrous, 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. Plaverise, Gray, I. c. Leaves nearly filiform : pappus a truncate cupule. — S. W. Texas, 



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



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

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

 awns alternate. 



162. FLAVERIA, Juss. (YYomJiavus, 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, G3o. Vermifuga, Ruiz & Pav. Prodr. 114, t. 24. 



§ 1. Involucre 4-15-flowered, composed of 3 to 5 principal bracts. 



* Heads more or less clustered in broad and open naked-pedunculate compound termmal corymbi- 

 form cymes: leaves soniewliat lleshy : involucre of 5 bracts: corollas except in the last species 

 nearh' or quite glabrous. 



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

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



23 



