﻿620 Small: Botany of Southeastern United States 



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those of the involucre, are strongly spirally arranged, giving a 

 conspicuous twist to the heads. 



The plants on which the species is founded were collected by 

 Mr. A. A. Heller, near Texarkana, Bowie County, Texas, Septem- 

 ber, 1898, no. 4188. 



DOELLINGERIA SERICOCARPOIDES. 



Perennial, deep green. Stem erect, 8-12 dm. tall, corymbosely 

 branched above, finely ridged, purple or purple-mottled, glabrous 

 to the ultimate divisions or near them ; leaves numerous ; blades 

 firm, elliptic to lanceolate-elliptic, acute or slightly acuminate at 

 the apex, somewhat scabrous above, glabrous and paler beneath 

 or minutely pubescent on the nerves beneath, ciliate, narrowed 

 into short petioles or nearly sessile : peduncles minutely pubes- 

 cent : involucres cylindric-campanulate, about 4 mm. high, 2-2.5 

 mm. thick ; bracts very sparingly pubescent, outer linear-lanceo- 

 jate, inner linear, ciliate at the tip : rays white, 2-4, oblong, 5-6 

 mm. long : mature heads about 8 mm. high : achenes almost 



glabrous. 



In low grounds, Arkansas and Texas. Fall. 



The DocUingeria inhabiting the lower Mississippi valley is un- 

 doubtedly specifically distinct from all the recognized species. It 

 was separated from related forms in Torrey and Gray's Flora of 

 North America and recognized as a species by Schultz Bi- 

 pontinus in the Meisner Herbarium. However, as far as I can 

 learn, it has never been given a name. From the other species 

 of the genus it may be distinguished by the more rigid habit 

 and the firmer texture of the leaves, but the most characteristic 

 distinction lies in the inflorescence ; this is quite suggestive of the 

 species of Sericocarpus in the ultimate clusters, but the branches of 

 the inflorescence are conspicuously elongated. The small heads 

 which are only about half the size of those of its relatives furnish a 

 crucial character. The original specimens were collected by Mr. 

 A. A. Heller, near Texarkana, Miller County, Arkansas, in Au£ 

 and September, 1898, no. 4137. 



Aster continuus. 



Perennial, deep green. Stems erect, pubescent with short up- 

 curved hairs, simple below, much branched above, slightly flexuous. 

 leaves spreading ; blades 2-4 cm. long, somewhat fiddle-shaped, 

 acute, shallowly serrate or nearly entire, ciliolate, scabro-pubescen 



ust 



