XXXIV SYNOPSIS OF GENERA. 



MITCHELLA. Ft. by pairs upon the same germ. Col. 4-toothed. 

 Cor. funnel-form ; tube cylindric ; limb 4-parted, spreading, villous on 

 the inner side. Stain, scarcely exserted. Stig. 4-cleft. Ber. by the 

 union of 2 germs didymous, 4-seeded. Rubiacea, p. 160. 



LINN.SA. Col. with the tube ovate ; limb 5-parted ; segments lanceo- 

 late-subulate. Cor. turbinate, subcampanulate, 5-lobed. Stam. some- 

 what didynamous. Stig. globose. Ber. small, ovate, dry, 3-celled : 

 (one cellnly with a perfect seed.) Caprtfotiacea, p. 159. 



** Flowers suptrio'r. Carol many-pctalled, or none. 



CofcHus. Col. 4-toothed. Pet. 4, oblong. Drupe with a 2-celled 

 nut. Cornea, p. 153, 



ISNARDIA. Cat. 4-parted, persistent. Cor. 4-petalled or none. 

 <Caps. 4-sided, 4-celled, many-seeded. Onagraria;, p. 119. 



SANGUISORBA. Col. 4-cleft, with 2 scales at base externally. Pet. 

 none. Carp. 2, included within the calyx, crowned by a style with a 

 imbricate apex, converted into dry indehiscent 1-seeded acines. San- 

 gidsorbcte, p. 114. 



*** Flowers inferior. Corol \-petallcd. 



PLANTAGO. Col. 4-cleft. Cor. 4-clefl ; border reflected. Slam. 

 mostly exserted, very long. Caps. 2-celled, opening transversely. 

 PlantagincK, p. 292. 



CENTAURELLA. Col. 4-parted, appressed. Cor. subcampanulale, 4- 

 parted ; segments somewhat erect. Stig. thick, glandular, and some- 

 what 2-cleft. Caps. 1 -celled, 2-valved, many-seeded, surrounded by 

 the persistent calyx and corol. Gentianete, p. 243. 



EXACUM. CaL deeply 4-parted. Cor. 4-clefl ; tube globose. Caps. 

 bisulcate, 2-celled, many-seeded. Gentiancte, p. 242. 



SWERTIA. Cal. flat, 4 5-parted. Cor. 4 or 5-parted ; tube very 

 short ; border spreading, with 2 nectariferous ciliate pores at the base 

 of each. Style short. Stig. 2. Cop*. 1 -celled, 2-valved. Gentiajwe , 

 p. 240. 



FRASERA. Cal. deeply 4-parted. Cor. 4-parted, spreading ; seg- 

 ments oval with a bearded orbicular gland in the middle of each. C \ips. 

 compressed, partly margined, 1-celled. Seeds few, large, imbricate, 

 with a membranaceous margin. Gentianeec, p. 241. 



OBOLARIA. Cal. 2-parted, resembling bracta. Cor. campanulate 4- 

 cleft ; segments entire, sometimes crenulate. Stam. proceeding from 

 the cleft of the corol, somewhat didynamous. Stig. emarginate. Caps. 

 ovate, 1-celled, 2-valved, many-seeded. Gentianefs, p. 244. 



*** Flowers inferior. Corol 45-petalled. 



AMMANIUA. Cal. campanulate, 8-toothed. Cor. 4-petalled or none, 

 inserted upon the calyx. Caps. 4-celled, many-seeded. Salicarue, p. 

 125. 



' PTELEA. CaL 4 5-parted. Pet. 4 5, spreading. Stig. 2. Sa- 

 mara compressed, orbicular, 2-celld, 2-seeded, with a broad and cir- 

 cular margin. Zanthozylcte, p. 71. 



