Dec, 191 7j The Aster ece of Ohio 57 



1. Doellingeria umbellata (Mill.) Nees. Tall Flat-top 

 Aster. Corymbosely branched plants with striate stems, 

 glabrous or pubescent above, 1-8 ft. high. Leaves lanceolate to 

 oblong-lanceolate, ascending, glabrous above, pubescent on the 

 veins beneath, membramous, acuminate at the apex, short 

 pctioled at the base, stem leaves 5-G in. long, ^-1 in. wide; the 

 upper leaves sessile, hispid-margined. Heads numerous, in 

 terminal compound corymbs; rays 10-15, white; bracts of the 

 broadly campanulate or hemispherical involucre lanceolate, 

 usually pubescent, ovate, often imbricated in 3-4 series, the 

 outer shorter. Pappus usually white. Achenes slightly pubes- 

 cent. In moist soil. July-October. Rather general. 



2. Doellingeria infirma (Mx.) Greene. Infirm Flat-top 

 Aster. Slender sparingly branched plants with round glabrous 

 or roughish stems, l|-3 ft. high. Leaves entire, hispid-mar- 

 gined, glabrous above, sparingly hispid on the veins beneath, 

 the lower obovate, small, obtuse, usually sessile, the upper 

 larger, oblong-lanceolate acute, 2-5 in. long, 1-1^ in. wide. 

 Heads few, about 1 in. broad, in a spreading corymbose cluster; 

 rays 8-15, white; bracts of the broadly campanulate involucre 

 oblong-lanceolate, obtuse, sparingly pubescent, imbricated in 

 about 4 series. Pappus tawny. Achenes nerved and glabrous. 

 In dry, usually rocky soil. August to September. Portage 

 County. 



lonactis Greene. Stiff leaf Aster. 



Low branching perennial herbs. Stem leaves numerous, 

 narrow, entire, the basal ones none. Heads rather large and 

 showy, terminating the stem and branches; involucre of 

 appressed coriaceous bracts imbricated in several series; ray- 

 flowers carpellate, violet; disk flowers violet. Pappus double, 

 the inner of long capillary bristles, the outer shorter. 



1. lonactis linariifolius (L.) Greene. Stiffleaf Aster. Very 

 leafy corymbosely branched plants with stiff tufted puberulent 

 or scabrous stems, ^-2 ft. high. Leaves linear or spatulate, 

 spreading, one nerved, mucronate at the apex, f-l| in. long, 

 about \ in. wide, sessile, those of the branches much smaller and 

 somewhat appressed. Heads several, about 1 in. broad, 

 terminating the branchlets; rays 10-15, violet, rarely white, 

 with entire, dentate, or laciniate tips; bracts of the broadly 



