892 FLORA, 



outer of thin broad rounded scales, the inner of slender naked bristles, or these 

 sometimes wanting in the southwestern A. occidentale. [Greek, a pleasing beard.] 

 Five known species, natives of N. Am. 



Stem i-leaved and branched above, bearing 2-6 heads. I. A. Virginicum. 



Scape naked, monocephalous. 



Head about 25 mm. broad ; pappus-bristles 12-20; perennial. 2. A. Dandelion. 

 Head 6-14 mm. broad; pappus-bristles 5-7; annuals. 



Bracts of the involucre 5-8, remaining erect, firm, keeled. 3. A. occidentale. 

 Bracts of the involucre 8-18, at length reflexed, thin. 4. A. Carolinianum, 



1. Adopogon Virginicum (L.) Kuntze. Cynthia. Virginia Goats- 

 beard. (I. F. f. 3516.) Perennial, glabrous and glaucous ; stem 3-6 dm. high, 

 [-leaved and branched above. Basal leaves tufted, runcinate, sinuate, denticu- 

 late, or entire, 5-17 cm. long, narrowed into margined petioles; heads about 4 cm. 

 broad; involucre of 9-15 lanceolate nerveless bracts 6-8 mm. long; achenes nearly 

 oblong; pappus of 10-15 oblong scales and an equal or greater number of capil- 

 lary bristles; flowers orange to reddish orange. In moist woods and meadows, Mass. 

 to southern Ont. and Manitoba, Ga., Ky., Mo. and Kans. May-Oct. 



2. Adopogon Dandelion (L.) Kuntze. Dwarf Dandelion or Goatsbeard. 

 (I. F. f. 3517.) Perennial, acaulescent, glabrous and somewhat glaucous; scape 

 15-45 cm. high, slender. Stolons filiform, bearing globose tubers; leaves all basal, 

 tufted, linear-lanceolate to spatulate, entire, denticulate, sinuate, or pinnatifid, 

 narrowed at the base, 7— 15 cm. long, 4-10 mm. wide; head about 25 mm. broad; 

 involucre about I cm. high; pappus similar to that of the preceding species. In 

 moist soil, Md. to Fla., west to Kans. and Tex. April-June. 



3. Adopogon occidentale (Nutt.) Kuntze. Western Dwarf Dandelion. 

 (I. F, f. 3518.) Annual, acaulescent; scapes tufted, 5-20 cm. high, usually glandular, 

 at least above, bearing a single head 10-20 mm. broad. Leaves basal, lanceolate 

 to obovate, entire to pinnatifid, mostly shorter than the scapes; involucre 4-6 mm. 

 high, its bracts 5-8, lanceolate, becoming ovate-lanceolate to ovate, firm and keeled 

 at maturity, remaining erect; pappus of 5 obovate scales and usually 5 alternating 

 bristles. Prairies, southern Mo. to Tex. 



4. Adopogon Carolinianum (Walt.) Britton. Carolinia Dwarf Dan- 

 delion. Krigia. (I. F. f. 3519.) Annual, acaulescent; scapes usually several 

 from the same root, very slender, glabrous or hispidulous, monocephalous, 3-40 cm. 

 high. Leaves commonly all basal, tufted, spatulate, lanceolate or linear, pinnatifid, 

 sinuate, lobed, dentate or rarely entire, 3-15 cm. long, narrowed into margined 

 petioles; head 6-14 mm. broad; involucre of 9-18 linear-lanceolate bracts; pappus 

 usually of 5 round short scales and 5-10 long capillary bristles. In dry, sandy 

 soil, Me. to Ont., Minn., Fla. and Tex. April- Aug. 



5. ARNdSERIS Gaertn. 



A low annual scapose herb, glabrous, or nearly so, with tufted basal dentate or 

 nearly entire leaves. Scapes several or numerous, simple or branched, upwardly 

 thickened below the solitary heads of yellow flowers. Involucre campanulate, its 

 bracts in I series, narrow, equal, thickened and keeled on the back after flower- 

 ing, rarely with a few outer minute ones. Receptacle flat, pitted, not chaffy. 

 Anthers sagittate. Style-branches obtuse. Achenes oval, 8-10-ribbed, narrowed 

 below, truncate, or with a denticulate margin. Pappus none. [Greek, lamb-suc- 

 cory.] A monotypic genus of western Europe. 



1 Arnoseris minima (L.) Dumort. Lamb Succory. (I. F. f. 3520.) Scapes 

 slender, 7-30 cm. high, leafless, simple, or with 1-4 branches mostly above the 

 middle, gradually thickened and hollow upward. Leaves oblanceolate, obovate, wJ 

 oblong. 3-7 cm. long. 6-20 mm. wide, usually coarsely and sharply toothed, nar- 

 rowed into margined petioles; heads 16 mm. broad, or less; bracts of the involucre 

 linear lanceolate, acuminate, strongly keeled after flowering, 4-8 mm. long, curv- 

 ing over the achenes. Mount Desert Island, Me. Fugitive from Europe. Summer. 



6. HYPOCHAERIS L. 



Mostly perennial herbs, with scapose, often branched stems and mostly basal 

 tufted leaves, pinnatifid to entire, those of the scapes few, scale-like, very small, or 

 none. Heads mostly large, long peduncled. Flowers yellow. Involucre oblong- 



