TETRANDRIA.— MONOGYNIA. 



HAB. Dry woods. July— Aug. If.. Stem \ ft. high . 



Jeav. obtuse, punctate ;Jl. purp. ; segments acute. 

 10. G. circcezans : stem erect, smooth ; leaves in fours, 

 oval, obtuse, smooth ; margin and nerves ciliate : 

 peduncles divaricate, few-flowered; flowers re- 

 mote, subsessile ; fruit nodding, with hooked bris- 

 tles. 



HAB. Rocky woods. June — July. If. Stem 1 ft. 



high; branch, at base ; leav. 3~nerved ;fl. purp. 



1 1. G. lanceolaturn : stem erect, very smooth ; leaves in 



fours, lanceolate, generally acute, smooth, 3- 



nerved ; margin subciliate ; peduncles divaricate ; 



fruit sessile, nodding, covered with hooked bristles. 



HAB. Rocky woods. July. If.. Stem 1 ft. high: 

 leav. 2 in. long, membran. ;Jl. purple. 

 \2. G. bermudianum : stem much branched, scarcely 

 pubescent ; leaves in fours, ovate, obtuse, 

 smooth, with pellucid dots ; margin and nerves 

 pubescent ; flowering branches elongated ; fruit 

 uncinately hispid. 



HAB. Pennsylvania. June. If. Leav. linear when 

 young, 3-nerved; jl. panicled ; seg. of the cor. 

 lanceol. -}- . 

 .;. G, boreale: stem straight and erect, branched, ver) 

 smooth ; branches short ; leaves in fours, linear- 

 lanceolate, generally obtuse, 3-nerved ; margin in- 

 volute and scabrous ; flowers in a terminal panicle, 

 divaricate ; fruit minutely and uncinately hispid. 



HAB. Sandy pine woods. Aug. — Sept. 1J. . Stem 

 18 in. high; pan. pyramidal, crowded ; Jl. white. 



107. SPERMACOCE. Rubiaceie. 



S. diodina : stem diffuse, terete, hairy ; leaves linear- 

 lanceolate, nearly smooth : margin and keel serru- 

 late ; stipules with numerous long bristles ; flower.- 

 axillary, sessile, solitary, alternate ; fruit hairy. 



HAB. Sandy soils. Aug. 0c Stem procumb., 6 — f! 

 in. long; leav. oppos. ; Jl. white or pale purp. 



108. D10DIA. Rubiacece. 



D. virginica: smooth ; stem procumbent, nearly te- 

 rete ; leaves lanceolate ; corolla smooth within : 

 fruit oblong, smooth. 



