446 Cichorieae 



and mostly large long-peduncled heads. Involucre 

 oblong-cylindric to campanulate, its bracts herbaceous 

 in several series. Receptacle flat, chaffy. Flowers 

 yellow. Achenes oblong to linear, 10-ribbed, contracted 

 above or the outer truncate. Pappus of 1 row of plu- 

 mose bristles, sometimes with some shorter simple ones. 



1. H. radicata L. Perennial ; steins several, slender, 3-6 

 dm. high, branched or rarely simple; leaves spreading on the 

 ground, oblanceolate to obovate, pinnatifid-lobed to dentate, 5-15 

 cm. long, hirsute; heads 2.5 cm. broad or more; achenes rough, 

 all with slender, long beaks. 

 Pasadena, McClatchie. 



72. PTILOR.IA Raf. 



Annual or perennial, mostly glabrous, often glaucous 

 herbs, with erect simple or branched usually rigid stems, 

 alternate or basal entire or runcinate-pinnatind leaves, 

 those of the branches often small and scale-like, and 

 small erect heads of usually pink flowers paniculate or 

 solitary at the ends of the branches. Involucre cylin- 

 dric or oblong, its principal bracts few, equal, scarious- 

 margined, slightly united at the base, with numerous 

 short exterior ones. Flowers pinkish, opening in the 

 morning. Receptacle flat, naked. Anthers sagittate at 

 base. Style-branches slender. Achenes oblong or linear, 

 terete, 5-ribbed, truncate or beaked at summit. Pappus 

 of 1 series of rather rigid plumose bristles. 



1. P. virgata (Benth.) Greene. Stems rigid, 3-10 dm. high, 

 virgate, glabrous throughout and the herbage deep green ; leaves 

 runcinate ; heads 6-8 mm. high, subsessile along the naked upper 

 part of the stem and branches, 4-8-flowered ; achenes subclavate or 

 oblong, ribbed and with as many mostly closed grooves, rugose ; 

 pappus white, plumose almost throughout, rather persistent. 



Common on dry ground, especially toward the coast. July-September. 



2. P. pleurocarpa Greene. Taller and stouter than the last, 

 virgate-paniculate, glabrous and glaucous; heads rather small, 



