368 COMPOSITiE. Palafoxia. 



116, PALAFOXIA. Lagasca, nov. gen. h. Madr. (1815) p. 26; DC. 

 Paleolaria, Cass. (1816), I/f5;5.— Polypteris, Nutt. (1818); not oi Less., nor of DC. 



Heads 10-30-flowered ; the flowers all perfect and tubular; or the exterior 

 series either imperfectly or manifestly radiate ; the rays 3-cleft, pistillate. 

 Scales of the obconical or campanulate involucre 8-15, membranaceous or 

 herbaceous with scarious tips, appressed (or spreading in fruit) in 1-2 series, 

 shorter than the disk. Receptacle small, flat, naked or slightly alveolate. 

 Corolla of the disk with a slender tube and an expanded deeply 5-cleft or 

 5-parted limb ; the lobes linear or lanceolate, spreading, glabrous. Branches 

 of the style long and filiform, flattish, glandular-pubescent throughout- 

 Achenia quadrangular, slender, tapering to the base, minutely pubescent. 

 Pappus of 6-12 membranaceous denticulate pinnately striate scales, fur- 

 nished with a strong midnerve, which is thickened at the base and often 

 somewhat produced at the apex ; the pappus of the exterior flowers often 

 much shorter. — Herbaceous or suffruticose (chiefly Mexican and Texan) 

 cinereous or strigose-scabrous plants; the loosely paniculate or corymbose 

 branches and peduncles often glandular. Leaves linear or lanceolate, en- 

 tire, somewhat petioled, alternate, scattered, or the lower opposite, 1-3-nerved. 

 Flowers white, flesh-colored, or purple. 



§ 1. Heads radiate, or with some of the marginal flou-ers palmate or irregu- 

 lar, and with a smaller pappus than the disk-flowers : scales of the involu- 

 cre someiohat herbaceous, equal, in 1-2 series, often someichat embracing the 

 exterior achenia {nerves of the lobes of the disk-corolla intramarginal.)— 



EUPALAFOXIA. 



1. P. Hookeriana : leaves' lanceolate, 1-3-nerved; heads (large) many- 

 flowered, radiate; scales of the involucre 12 or more, very glandular (as well 

 as the peduncles and branches), imbricated in 2 series; the exterior lance- 

 olate ; the interior obovate-lanceolate or oblong ; rays 8-10, exserted, broad- 

 ly cuneiform, deeply 3-cleft; limb of the disk-coroUa 5-cleft below the mid- 

 dle; pappus of the disk-flowers of 6-8 narrowly lanceolate acuminate scales, 

 as long as the attenuated hairy achenium ; in the rays of as many obovate 

 or spatulate very obtuse rigid scales, many times shorter than the nearly 

 glabrous achenia. — P. Texana, Hook. ! ic. pi. t. 148, not of DC 



(3. subradiata : smaller ; rays few and inconspicuous, irregular or pal- 

 mate. — Stevia spacelata, (Nutt. mss.?) Torr. ! in ann. lye. NeivYork, 2. 

 p. 214. 



Texas, Drummond ! jS. Arkansas, Dr. James ! Texas, Mr. Callana ! — 

 Plant apparently 1-2 feet high, rather stout. Heads three-fourths of an inch 

 in length ; the showy rose-purple rays in Drummond's plant half an inch 

 or more in length, resembling aGaillardia ; the disk-flowers also rose-color; 

 the tube glandular. Scales of the involucre not embracing the achenia ; 

 which are very slender, and in the disk one-third of an inch long. — Between 

 the long acuminate pappus of the central flowers, and the very short and ob- 

 tuse nearly corneous scales of the rays, there is almost a complete gradation; 

 the exterior flowers which have a tendency to become radiate presenting a 



