CICHOEIACEAE 1315 



2. Sitilias multicaulis (DC.) Greene. Foliage minutely pubescent, or glabrate. 

 Stems solitary or tufted, ascending or spreading, 1-4 dm. long, more or less branched : 

 leaves mainly basal, 5-15 cm. long; blades sinuate or irregularly pinnatifid, the seg- 

 ments entire or toothed; upper leaves narrower, deeply pinnatifid or merely toothed: 

 involucres 1-1.5 cm. long; inner bracts narrowly linear, acute; outer bracts linear- 

 subulate, i to nearly J as long as the inner bracts: ligules bright yellow, oblong or 

 linear-oblong, 1.5-2 cm. long: achenes 3.5-4 mm. long, reddish, transversely wrinkled. 



In dry soil, Florida to Texas, Arizona and adjacent Mexico. Spring and summer. 



3. Sitilias grandiflora (Nutt.) Greene. Foliage minutely pubescent. Leaves 

 basal, blades 3-20 cm. long, pinnatifid; segments entire or sinuate: scapes erect or 

 ascending, solitary, tufted, 1-3 dm. tall, simple: involucres about 1.5 cm. long: inner 

 bracts narrowly linear, outer bracts less than i as long as the inner: ligules linear 

 or linear-oblong, 1.5-2 cm. long. 



On prairies, Kansas to Arlsansas and Texas. Spring to fall. 



4. PINAROPAPPUS Less. 

 Perennial caulescent herbs, with leafy or scape-like stems. Leaves sometimes 

 basal: blades narrow, remotely pinnately-toothed or pinnatifid, or entire. Heads pink 

 or white, long-peduncled. Involucres campanulate: bracts in several series, the inner 

 narrower than the outer. Eeceptacle flat, somewhat chaffy. Ligules of the ray- 

 flowers truncate and toothed at the apex. Anthers sagittate at the base. Stigmas 

 slender. Achenes narrow, terete or somewhat angled, 10-15-ribbed, glabrous. Pappus 

 of many very slender bristles. 



1. Pinaropappus roseus Less. Foliage glabrous, glaucescent. Stems erect, or 

 branched at the base, the branches often ascending, 1-3 dm. tall, nearly naked, or 

 leafy near the base, upper parts elongated: leaf -blades linear to lanceolate, 3-10 cm. 

 long, entire or pinnatifid, acute or acuminate: involucres campanulate, about 1 cm. 

 high; bracts oblong to linear-lanceolate or linear, the outer obtvise, the inner acute: 

 ligules linear, 1-1.5 cm. long, rose or white: achenes slender, 4-5 mm. long. 



On stony prairies, Texas and adjacent Mexico. Spring and summer. 



5. LYGODESMIA D. Don. 



Annual or perennial caulescent herbs, or somewhat shrubby plants, with rigid, 

 sometimes rush-like stems. Leaves alternate: blades narrow, entire or remotely 

 pinnately-toothed, sometimes reduced to inconspicuous scales. Heads pink or purple, 

 3-12-flowered, short- or long-peduncled. Involucres cylindric, double; inner of 5-8 

 slightly united bracts; outer of several very small bracts. Eeceptacle flat, notched. 

 Ligules toothed at the apex. Anthers saggitate at the base. Stigmas slender. 

 Achenes narrow, smooth or slightly ribbed. Pappus of many nearly equal very slender 

 bristles. 



Leaves reduced to scales, or sometimes with few linear blades at the base of the stem: achenes 10-13 

 mm. long, nearly as long as the pappus. 1. L. aphylla. 



Leaves, all or some of them, with pinnately-lobed blades: achenes 14-15 mm. long, 



often longer than the pappus. 2. L. Texana. 



1. Lygodesmia aphylla (Nutt.) DC. Stems erect or ascending, 3-8 dm. tall, 

 solitary or tufted, rush-like, naked or nearly so, forking above: leaves wanting, or 

 represented by narrow scales, or a few elongated linear blades at base of stem: in- 

 volucres cylindric, about 2 cm. long: bracts various, the outer small, 1-3 mm. long, 

 the inner linear: ligules rose-colored, 1.5-2 cm. long, toothed at the apex: achenes 

 narrow, 10-13 mm. long, nearly as long as the white pappus. 



In dry pine lands, Georgia and Florida. Summer. 



2. Lygodesmia Texana (T. & G.) Greene. Stems erect, 2-6 dm. tall, solitary, 

 forking above: leaves mainly at the base of the stem; blades linear or linear-filiform, 

 entire or remotely pinnately lobed; lobes small, 1-7 cm. long, entire: involucres about 

 1.5 cm. long: bracts various, the outer small, the inner linear, scarious-margined : 

 ligules rose-colored, about 1.5 cm. long, toothed at the apex: achenes narrow, 14-15 

 mm. long, often longer than the pappus. [L. aphylla var. Texana T. & G.] 



In rocky hills, Texas. Summer. 



