Marshallia. composite. 391 



Pine woods, &c., North Carolina! to Florida! Tennessee, and Western 

 Louisiana! June-Aue;. — A foot high, somewhat pubescent at the summit. 

 Lowest leaves 3-6 inches long, petioled ; the uppermost linear-setaceous; 

 all rigid. Involucre shorter than the disk. Scales of the pappus somewhat 

 denticulate, very obscurely 1-nerved. 



3. M. lanceolata (Pursh ! 1. c.) : stem simple, very leafy near the base, 

 naked above ; leaves lanceolate or oblanceolate, mostly obtuse, triplinerved, 

 tapering into petioles, the upper sessile; scales of the involucre oblong-linear, 

 obtuse ; chafflinear and somewhat dilated at the apex; achenia pubescent; 

 scales of the pappus ovate, acuminate. — Ell. sk. 2. p. 315; DC! I. c. 

 Persoonia lanceolata, Miclix. ! I. c. Trattenickia lanceolata, Pers. I. c. 

 Athanasia obovata, Walt. ! I. c. 



Upper districts of North Carolina ! to Middle Florida ! April-June. — 

 Stems 10-20 inches high, a little pubescent near the summit. Pappus 

 lawny, somewhat denticulate, cuspidate-acuminate. 



4. M. ceesjntosa (Nutt.) : stems mostly simple, caespitose, leafy only at the 

 base; leaves lanceolate-linear, rather obtuse, obscurely 1-3-nerved, some- 

 what petioled ; scales of the involucre oblong-linear, obtuse; chafT linear and 

 somewhat dilated at the apex ; achenia villous (at least on the nerves) ; 

 scales of the pappus ovate, scarcely acute. — Nutt. ! in DC. prodr. 5. p. 

 680 ; Hook. hot. mag. t. 3704. 



Woods and moist prairies, Arkansas & Western Louisiana, Nuttall! Dr. 

 Leavenworth.' Dr. Hale! Dr. Engelmartn! Texas, Drummo7id ! May- 

 June. — Plant 6-10 inches high, with much the aspect of an Armeria; the 

 leaves (2-3 inches long, & 2-3 lines wide) all crowded at the base of the 

 simple scape-like stem. Pappus conspicuous, tawny; the scales so broad as 

 to overlap, often lacerate-denticulate near the summit, not pointed. 



132. BLEPHARIPAPPUS. Hook. Jl. Bor.-Am. 1. p. 316. (excl. spec.) 



Ptilonella, Nutt. 

 Heads few-flowered ; the ray-flowers about 3, ligulate, short, dilated cunei- 

 form, 3-5-lobed, pistillate, and sometimes with rudimentary stamens; those 

 of the disk (7-9) tubular, perfect ; the central ones infertile. Scales of the 

 involucre 6-8, in a single series, oblong, equal, concave, with somewhat in- 

 volute membranaceous margins. Receptacle small, furnished with a mar- 

 ginal series of membranaceous chaff, partly embracing the fertile disk-flowers. 

 Corolla of the disk glabrous, with a short tube and an expanded throat, 5- 

 toothed. Style in the disk -flowers hairy and slightly thickened above the 

 middle ; the branches extremely short and obtuse, thick, glabrous, not appen- 

 diculate, the stignialic lines confluent at the summit! Achenia obconical or 

 clavate, villous. Pappus of 12 to 20 membranous pectinate-plumose narrow 

 scales, shorter than the corolla. — An annual slender (aromatic) plant ; with 

 nearly glabrous diffusely branched and corymbose stems, narrowly linear 

 entire and scabrous alternate and crowded leaves, and small heads termina- 

 ting the branchlets : the involucre, branchlets, and upper leaves glandular- 

 viscid. Rays and disk-flowers white : anthers brownish-purple. 



B. scaler (Hook. 1. c.)— .DC. prodr. 5. p. 679. Ptilonella scabra, Nutt. I 

 in trans. Amer. phil. soc. (n. ser.) 7. p. 386. 



Prairies and sandy plains of Oregon, east of Wallawallah, Douglas! 

 Nuttall ! — About a foot high. Cauline leaves an inch long, half a line wide. 



