TETRANDRIA. MONOGYNIA. 101 



Species. 1. C amencana. (Calix 4-toothed; berries 

 purple, . dible; but scarcely wholesome.) Of this g-enus, 

 besides the present species, there are 2 others in the 

 island of Jamaica, 1 in Carthag-ena, 2 in Peru, 1 in Japan, 

 and 5 in India. 



147. LYCIUM. Z. (Box-Thorn.) 



Calix iirreolate short, 4 or 5-cIeft, or 4 to 5- 

 toothcd. Corolla longer, tubulose, border erect, 

 4 to 5-lobed, or Hat, and 4 to 5 parted; orifice, 

 (or margin of the tube) closed by the beard of 

 the filaments. Staniiia e.xse vied,' Berry round- 

 ish, 2 celled, many seeded; seeds reniform. 



Shrubs for the most part .spinj- ramuli pung-enlly ter- 

 minrtted; leaves alternate, scme^imes fasciculated; flow- 

 ers axillary, solitary, or hy pairs. 



Species. 1. L. caroUniamm. (Without thorns.)— Of 

 this g-enus there are 3 species indipfenous to the South of 

 Evirope, 2 of them at the same time common to Nordiern 

 Africa, with two others peculiar to this portion of Africa; 

 4 to the Cape of Good Hope; 1 species and a permanent 

 variety were discovered by Pallas in the deserts of Tar- 

 tary, contig-uous to the shores of the Caspian sea; ^ 

 if not 3 other species appear to be peculiar to Chiaa; and 

 6 to Peru. 



148. CENTAURELLA. Jlichaux. Centauri- 

 UM. Per soon, 



CWfx 4 parted, appressed. CoroZZa suboam- 

 panulate, 4 parted; se/^ments somewhat erect. 

 fitigma tliirk. glandnloiis, and partly bifid. Cap- 

 sule 1 -celled, 2-valved, many- seeded, surround- 

 ed by the persistent calix and rorolla. 



Small annua's; appearing- almost leafless: leaves minute, 

 opposite, sessile, subulate. P'lowers subnaniculate. 



Species \. C. verna. 2. ceestivale^VvKSH. Probably 

 a mere variety of the following'. 3. paniculata. {Bartonkt 

 tenel/a, Muhlenberg-.) 



A North American g-enus, nearly allied to Gcntiana.- 



149. EXACUM. L. 



Calix deeply 4-parted. Corolla 4-cleft, tube 

 K2 



