﻿of the Southeastern United States 467 



leaves: panicles 5-12 cm. long, nearly cylindric : calices densely 

 pubescent, 2 mm. long or 2.5 mm. long at maturity ; tube campan- 

 ulate; segments oblong or ovate- oblong, about as long as the tube, 

 erect : petals linear from a filiform base, fully twice as long as the 

 calyx-segments : capsules about equaling the calyx at maturity, 

 tipped by the slender styles. 



On river bluffs near Nashville, Tennessee. Summer. This 



Ht 



its 



distribution as that species is widely dispersed. The two species 

 are quite similar in habit, but differential characters are plentiful 

 from the rootstock to inflorescence. The woody rootstock vary- 

 ing from 1.5-2 cm. thick is unknown in Heuckera vtilosa. The 

 pubescence wherever present is of a different type, the individual 

 trichomes being shorter and stouter. A conspicuous character is 

 the shall owly many-lobed leaf-blades with their closely dentate 

 margins. A peculiar and apparently constant difference exists in 

 the inflorescence: in the case of the species just described the pedi- 

 cels are more densely pubescence than the calices, while in the case 

 of Hatchcra villosa the calyx is the more densely pubescent mem- 

 ber. 



The original specimens were collected by Dr. Gattinger along 

 the Cumberland River at Nashville, Tennessee, August, 1878. 

 These specimens are in the Gattinger Herbarium at the University 

 of Tennessee. I am indebted to Prof. S. M. Bain for the use of 

 this material. 



v Euphorbia apocynifolia 



Perennial, bright green. Stems solitary or tufted, erect or as- 

 cending, 2-6 dm. tall, slender, sparsely pubescent or glabrate, 

 zigzag, at least at maturity, topped by a 2-3 -rayed umbel : rays 

 dichotomous, wire-like or filiform, ascending : leaves alternate ex- 

 cept the whorl or pair subtending the umbel ; blades thinnish, ob- 

 long to oval, 2-7 cm. long, obtuse, slightly re volute, pale beneath, 

 with glaucous midrib; petioles 3-6 mm. long, densely villous: 

 bracts opposite, similar to the leaves but smaller : peduncles fili- 

 form, glabrous: involucres campanulate, barely l.$ mm. high, 

 Jabrous: glands transversely oblong, about 0.5 mm. broad : ap- 

 pendages white, orbicular-cuneate, 1. 5-2 mm. long, rounded at 

 the apex. 



rr 



In sandy soil, Florida. Fall. 



