1 16 Cichorieae 



and mostly large long-peduncled heads. Involucre 

 oblong-cylindric to campanulate, its bracts herbaceous 

 in several series. Receptacle flat, chaffy. Flowers 

 yellow. Aeheiies 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; stems several, slender, :!-»; 

 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, McClatchu . 



72. PTILORIA Raf. 



Annual or perennial, mostly glabrous, often glaucous 

 herbs, with erect simple or branched usuallyrigid stems, 

 alternate or basal entire or runcinate-pinnatifid 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, searious- 

 margined, slightly united at the base, with numerous 

 short exterior ones. Flowers pinkish, opening in the 

 morning. Receptacle flat, naked. Anthers sagittate nt 

 base. Style-branches slender. A.chenes 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 fi-8 mm. high, subsessile along the naked upper 

 part of the stem and brandies, t-x-Howered ; 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 irlaucous; heads rather small, 



