378 COMPOSIT.E. Lasthekia. 



suppl. p. 354 ,• HooTi:. hot. mag t. 3730 ; Fisch., Meyer, 6^- Lallem. ind. sent. 

 St. Petersb. 1840. 



California, Douglas! Nuttall ! Common in cultivation. — Closely resem- 

 bles the precedinfr, except in the conspicuous rays, rather larger heads, and 

 entire absence of the pappus ; the corolla of the disk is also much longer ; the 

 lobes sparsely barbellate. The cultivated specimens are often entirely gla- 

 brous. We are only acquainted with a single species of Hologymne. 



122. BURRIELIA. DC. prodr. 5. p. 663. 



Heads many-flowered ; the ray-flowers 3-12, pistillate, ligulate (rarely 

 very short) ; those of the disk tubular, perfect. Scales of the spreading or 

 somewhat campanulate involucre 3-12, oval, acuminate, in 1-2 series, 

 nearly equal, a little longer than the disk. Receptacle conical, papillose. 

 Corolla of the disk with a slender tube, and an expanded 5-toothed limb. 

 Branches of the style terminated by a very short obtuse cone. Achenia 

 linear-fusiform or tetragonal, often somewhat compressed. Pappus of 2-5 

 lanceolate-awned scales or subulate awns, about the length of the corolla, or 

 sometimes none ! — Slender and somewhat pubescent annual (Californian) 

 herbs ; with opposite linear entire and sessile leaves, and solitary heads on 

 slender peduncles, terminating the stem or branches. Flowers yellow : the 

 anthers yellowish. 



§ 1. Pappus aicned ; that of the ray similar but more slender. — Burrielia 

 proper. 



* Rays %■ cry short : appendages of the style acute: lobes of the disk-coroUa glabrous. 



1. B. microglossa (DC. ! 1. c.) : yillous-pubescent ; scales of the involucre 

 and rays 3-4, the included ligules shorter than the styles; disk-flowers 6-12; 

 achenia attenuated, minutely scabrous; pappus 2-4- (or the in rays 1-) 

 awned. 



Cahfornia, Douglas! — Plant resembling a Pectis, 3-4 inches high ; the 

 heads appearing discoid. Leaves often an inch long, and a line wide. 



* * Rays obovatc or oblong, exscrted: lobes of the disk-corolla slightly barbellate. 



2. B. tenerrima (DC. ! 1. c.) : stem simple, filiform, nearly glabrous ; 

 scales of the involucre and the obovate rays about 5 ; achenia slender, gla- 

 brous; pappus 1-3-awned. 



California, Douglas! — Stem 3-4 inches high. Leaves filiform, half an 

 inch long. Rays short. 



3. B. parviflora (Nutt.) : much branched, diffuse, almost glabrous; scales 

 of the involucre and the oblong rays about 8 ; achenia minutely scabrous- 

 canescent, linear-obconical ; pappus 2-3-awned from a broad base. — Nutt.! 

 in trans. Amer. phil. soc. I. c. p. 381. 



St. Barbara, California, Nuttall! — Stems 2-3 inches high. Leaves near- 

 ly filiform, half an inch long, pubescent when young. Heads many-flow- 

 ered, 2-3 lines long ; involucre turbinate. Rays short. Scales of the pap- 

 pus triangular-ovate, short, abruptly awned. 



4. B. gracilis (DC) : appressed, pubescent or hairy ; stem sparingly 



