Voi,. III.] 



CHICORY FAMILY. 



267 



I. Picris hieracioides L,. 



Hawkweed Picris. 



(Fig. 3524.) 



Picris hieracioides L. Sp. PI. 792. 1753. 



Biennial, more or less hispid, much 

 branched, i-3 high. Leaves lanceolate 

 or oblong-lanceolate, dentate, or nearly 

 entire, the basal narrowed into petioles, 

 acute, often 6' long, those of the stem 

 mostly sessile and smaller; heads numer- 

 ous, > / -i / broad; involucre 4 // -6 // high, 

 its outer bracts linear, subulate, spread- 

 ing, the inner linear-lanceolate, acumi- 

 nate; pappus copious, nearly white. 



In waste places, Illinois, Pennsylvania, 

 New Jersey, and in ballast about the seaports. 

 Adventive from Europe. Native also of Asia. 

 "Very bitter. June-Sept. Old name L,angde- 

 beef. 



2. Picris echioides L. Bristly 

 Ox-tongue. (Fig. 3525.) 



Picris echioides L. Sp. PI. 792. 1753. 

 Helmintha echioides Gaertn. Fruct. & Sem. 2: 

 368. 1802. 



Annual or biennial, branched, hispid; stem 

 about 2}i high. Basal and lower leaves 

 spatulate or oblong, obtuse, repand-dentate, 

 2 / -6 / long, narrowed into petioles; upper 

 leaves sessile and clasping, oblong or lanceo- 

 late, smaller, the uppermost mainly acute 

 and entire; heads numerous, rather crowded, 

 short-peduncled, about y z ' broad; outer 

 bracts of the involucre 4 or 5, foliaceous, 

 ovate, acute, hispid-ciliate, the inner ones 

 lanceolate, membranous; achenes beaked. 



In waste places, Nova Scotia and Ontario, and 

 in ballast about the seaports. Fngitive from 

 Europe. July-Sept. Called also Bugloss and 

 Bugloss Picris. 



9. PTILORIA Raf. Atl. Journ. 145. 1832. 

 [Stephanomeria Nutt Trans. Amer. Phil. Soc. (II) 7: 427. 1841.] 



Annual or perennial, mostly glabrous, often glaucous herbs, with erect, simple or branched, 

 usually rigid stems, alternate or basal, entire dentate or runcinate-pinnatifid leaves, those of 

 the stem and branches often reduced to subulate scales, and small erect heads of pink flow- 

 ers, paniculate, or solitary at the ends of the branches, opening in the morning. Involucre 

 cylindric or oblong, its principal bracts few, equal, scarious-margined, slightly united at the 

 base, with numerous short exterior ones and sometimes a few of intermediate length. Re- 

 ceptacle fiat, naked. Anthers sagittate at the base. Style-branches slender. Achenes ob- 

 long or linear, terete or columnar, 5-ribbed, truncate or beaked at the summit, the ribs 

 smooth or rugose. Pappus of 1 series of rather rigid plumose bristles. [Greek, referring to 

 the feathery pappus.] 



About i6,species, natives of western and central North America. 



Involucre about 5" high; pappus brownish, plumose to near the base. 1. P. paucijlora. 



Involucre about 4" high; pappus white, plumose quite to the base. 2. P. tenuifolia. 



