Krigia 



Compositae 



1005 



50 



Map 2205 



Krigia Dandelion (L.) Nutt. 



50 



Map 2206 



Krigia virginica (U Will d. 



30 



Map 2207 



Krigia biflora (Walt.) Blake 



Plants not bearing tubers; basal leaves mostly 3-6 cm long; involucres usually 5-7 

 mm long; pappus of 5-7 short, rounded, white scales and an equal number of 



longer bristles 2. K. virginica. 



Plants with stems, usually 1-6 dm high, with 1-3 conspicuous, clasping leaves; flowers 

 on peduncles arising from the axils of cauline leaves; involucre usually less than 

 1 cm long; pappus similar to that of Krigia Dandelion 3. K. biflora. 



1. Krigia Dandelion (L.) Nutt. {Cynthia Dandelion (L.) DC.) Map 

 2205. In sandy clay soil, usually in open woodland on the crests of black 

 oak and chestnut oak ridges. It is found also in low ground in the post 

 oak flats. It is restricted to the southern counties, and Wilson's report for 

 it in Hamilton County I regard as an error in determination, since he does 

 not report Krigia biflora which should be found there. It has been reported 

 also from Clark and Jefferson Counties. 



N. J., Md., 111., Mo. to Kans., southw. to Fla. and Tex. 



2. Krigia virginica (L.) Willd. Dwarf-dandelion. Map 2206. This 

 species grows only in dry, sandy soil and is generally found on open wooded 

 dunes, ridges, sand hills and in sandy, fallow fields. It is infrequent to 

 frequent in its habitat. 



Maine, Ont. to Minn., southw. to Fla. and Tex. 



3. Krigia biflora (Walt.) Blake. (Rhodora 17: 137. 1915.) {Krigia 

 amplexicaulis Nutt. and Cynthia virginica (L.) D. Don.) Map 2207. Fre- 

 quent to common throughout the state. It has a wide range of habitats, 

 growing in soils ranging from clay to sand, and from marshes to the crests 

 of black and white oak ridges. It prefers open black and white oak wooded 

 slopes, open wooded dunes, interdunal flats, and moist, sandy prairies. 

 I have 52 specimens from Indiana and all of them have the peduncles and 

 involucres perfectly glabrous except 6 specimens which are more or less 

 densely glandular-pubescent on the peduncles below the flower and at the 

 base of the involucre. This glandular form is one of the varieties which 

 was named by Farwell (Amer. Midland Nat. 12: 76. 1930) and which 

 apparently has no taxonomic significance. 



Mass., Ont. to Man., southw. to Ga. and Kans. 



