Lygodesmia. composite. 485 



§ 3. Heads about 10-flowered: pappus rather soft : stems scapiform, sparing- 

 ly branched : leaves mostly radical, linear and elongated, somewhat fleshy. 

 — Erythremia, Natt. 



3. L. grandiflora: dwarf; stems several from the same root (a span 

 high), scarcely longer than the narrowly linear radical leaves. — Erythremia 

 grandiflora, Nutt. I in trans. Amer. phil. sac. I. c. p. 445. 



Borders of the Platte, near the Rocl^y Mountains, Nuitall ! — Heads large 

 for the size of the plant, equalling those of the following species. Proper 

 scales of the involucre about 8 ; the calyculate scales ovate, ciliate. Ligules 

 large and showy, rose-red. Achenia unknown. Pappus somewhat evident- 

 ly denticulate-scabrous towards the base. 



4. L. a]}liyila {DC. I.e.): stem slender, elongated, striate-angled, spar- 

 ingly dichotomous towards the summit, many times longer than the attenu- 

 ated linear-filiform chiefly radical leaves ; bracts minute at the origin of the 

 branches. — Prenanthes pumila, Baldivin! niss. P. aphylla, Nutt..' gen. 2. 

 p. 123, Sfin Sill. jour. p. 299 ; Ell. ! sk. 2. p. 261. Erythremia aphylla, 

 Nutt. ! I. c. p. 446. 



(i. Texana : stem stouter ; leaves flattish, sparingly and remotely pin- 

 natifid-laciniate. (Perhaps a distinct species.) 



Pine barrens, St. Mary's, Georgia, Baldivin! Florida, Mr. Croom! Dr. 

 Chapman ! Dr. Leavenworth ! &c. (i. Texas, Drummond ! — Stem about 2 

 feet high, nearly naked. Heads showy; the cylindrical involucre nearly an 

 inch long : the calyculate scales very small, ciliate. Ligules large, rose- 

 color. Achenia very long and slender. Pappus slightly fawn-colored, 

 scarcely scabrous. 



191. MALACOTHRIX. DC. prodr. 7. p. 192. (char, imperfect.) 

 Malacomeris, Leucoseris, & Leptoseris, Nutt. 



Heads many-flowered. Involucre broadly campanulate or hemispherical; 

 the scales narrow, numerous, more or less imbricated in 2-3 series, the exte- 

 rior often calyculate. Receptacle naked. Ligules narrow. Achenia oblong, 

 truncate at both ends, angled or nearly terete, 8-15-striate or ribbed, smooth, 

 glabrous ; the summit furnished (as in Andryala and many Hieracia) with a 

 minute or inconspicuous crenulate or many-toothed ring, surrounding the 

 base of the true pappus. Pappus consisting of a single series of slender and 

 rather soft silvery-white capillary bristles (20-40 in number), which are ser- 

 rulate-scabrous towards the apex, but minutely and sparsely barbellate near 

 the base, deciduous. — Californian herbs (with a single and dubious excep- 

 tion), of somewhat varied aspect, mostly with a deciduous pubescence, and 

 pinnatifid or undivided leaves. Flowers yellow or white. 



This genus is most allied to Andryala ; with which the section Leucoseris nearly 

 agrees in habit, and from which the naked receptacle, the different pubescence, &c. 

 chiefly distinguish it. 



§1. Annual, acaulescent : scales of the involucre narrowly linear, acuminate, 

 in 2-3 series; the exterior shorter and loose : flotvers yelloio. — Eumalaco- 



THRIX. 



1. M. Californica (DC. ! 1. c.) : softly and loosely villous when young, al 



