244 KEY AND FLORA 



2. A. plantaginifolia Richards. Common Everlasting, Pussy's 

 Toes. Stolons ascending, leafy throughout ; stems slender, 4-20 in. 

 high. Basal leaves and those at the tips of the stolons pale and very- 

 downy or covered with cobweb-like hairs above; stem leaves scat- 

 tered, lanceolate, taper-pointed. Heads more or less closely corymbed. 

 Styles crimson. In dry soil, very common. 



3. A. solitaria Rydb. Stolons when well developed procumbent, 

 leafy only at the tip; stems 2-8 in. high. Basal leaves obovate- 

 spatulate, densely downy beneath, covered with cobweb-like hairs 

 above, but becoming smoothish ; stem leaves few, small, lying close 

 to the stem. Heads solitary. Styles crimson. Rich wooded hillsides, 

 central and south central states. 



IV. RUDBECKIA L. 



Perennial or biennial. Leaves alternate, entire or lobed. 

 Heads radiate, long-peduncled, many-flowered; bracts imbri- 

 cated in 2-3 series, spreading ; receptacle convex or long-con- 

 ical, with concave, chaffy scales. Kay flowers yellow, neutral ; 

 disk flowers purple to brown, bisexual. Akenes smooth, 4- 

 angled, truncate. Pappus a few short teeth or wanting.* 



1. R. hirta L. Cone Flower, Black-Eyed Susan. Annual or 

 biennial ; stem erect, rough-hairy, simple or branched, 2-3 ft. high. 

 Leaves lanceolate to oblong, thick, obscurely serrate, rough-hairy, 

 3-ribbed ; the lower petioled, the upper sessile. Heads few, long- 

 peduncled ; bracts rough-hairy, spreading. Ray flowers 10-20, orange- 

 yellow; disk flowers purplish-brown. Chaff acute, hairy at the apex. 

 Pappus none. On dry, open ground. 



V. LEPACHYS Eaf. (RATIBIDA) 



Perennial herbs. Leaves alternate, pinuately divided. Heads 

 radiate, long-peduncled, many-fiowered ; bracts few, small, 

 spreading. Eeceptacle columnar or slender, the chaff of con- 

 cave truncate scales. Kay flowers yellow or with brown at 

 the base, neutral ; disk usually grayish. 



1. L. pinnata T. & G. Gray Cone Flower. Stem slender, branch- 

 ing, often 4 ft. or more high, gray with minute close-lying hairs. 

 Leaves mostly large, pinnately 3-7-divided ; the basal ones with long 

 petioles, stem leaves sessile, the uppermost small. Disk oblong, gray 

 or at length brown. Rays 4-10, light yellow, drooping, often 2 in. 

 long. In dry prairie soil and borders of thickets. 



