182 DICOTYLEDONOUS. 



Genus XXX. BOLTONIA. 



Involucre imbricate ; ray florets numerous, pistillate ; those 

 of the disk perfect. Receptacle conic, dotted. Seeds flat, 

 margined. Pappus awned, with two opposite ones larger 

 than the rest. 



1. B. AsTEROiDEs ^^effi erect, somewhat striate, glabrous, ieares alter- 

 nate, sessile, emire, lanceolate, glabrous, with scabrous margins. Flowers in 

 panicles, on long peduncles ; involucre with subulate scales; ray florets en- 

 tire, linear; those of the disk yellow. Seeds comj ressed. 



White or reddish, %. August — Sept. On the margins of swamps. 

 Middle Car. and Ga. 1-2 ft 



2. B. Glastifolia. Stem erect, branching, slightly angled, glabrous. 

 Leaves long-lanceolate, serrate, acute, with cartilaginous margins ; lower ones 

 somewhat toothed. Flowers soUtary, on short peduncles ; involucre with gla- 

 brous, subulate leaves, with the margins slightly serrulate ; ray florets nu- 

 merous, those of the disk numerous, yellow. Seeds pubescent, winged, ob- 

 cordate ; pappus consisting of scabrous bristles, unequal. 



Whue, or reddish. % July— Aug. Middle and Southern Ga. 2-3 ft, 



(c) EupaiorinecB. The Boneset Tribe. 

 Genus XXXI. KUHNIA. 



Involucre cylindrical, imbricate ; florets all perfect, tubu- 

 lar. Pappus plumose, sessile. Seed pubescent, slriale. 



1. K. EupATORioiDEs. i^^em glabrous, branching, the youug branches Very 

 pubescent. Leaves broad-lanceolate, irregularly serrate, petiolate, slightly 

 scabrous on the upper surface, pubescent beneath, spotted. Flowers in pan- 

 icles, terminal; involucre about 10-ftowered, with linear, pubescent leaves, 

 the outer ones small. Seeds pubescent. 



White. % Sept.— Oct. Middle and Western Ga. and Ala. 2-3 ft. 



2. K. Critonia. Stem pubescent, slender, striate. Leaves lanceolate, or 

 linear, petiolate, entire, with the margin revolute when young, dotted beneath. 

 Flowers in terminal divaricate panicles; mvolucre imbricate, with 8-10 flow- 

 ers. Leaves linear, pubescent, outer ones reflexed at the summit. Seed cyl- 

 indrical ; pappus of numerous plumose rays. 



White. %■ Sept.— Oct. hi dry soils. Common. 2-3 ft. 



Genus XXXII. MIKANIA. 



Involucre 4-6. leaved, equal, with 4-6 florets. Receptacle 

 naked ; florets all perfect, tubular. Style long, deeply cleft. 

 Pappus pilose. 



1. M. ScANDEiNS. Stem twining, glabrous, Leaves cordate, acuminate, 

 repand toothed, with unequal divaricate lobes. Flowers in axillary corymbs. 



Climbing Thoroughwort. 

 Bluish White. % July— Sept. Margins of rivulets. Common. 10-15 ft. 



2. M. PuBESCENS. Stem twining pubescent; striate. Leaves cordate, 

 acuminate, angularly toothed, somewhat hastate at the base. Flowers in 

 axillary, and terminal, paniculate corymbs ; involucre, 5-leaved, one smaller 

 than the rest, hairy. Flowers [ragrant. <Seed oblong, striate. Eeceptack dot- 



ted. 



Pale purple. %. July— August. Common. 15-20 feet. 



