DIDYNA>IIA. ANGI09PEUMIA. 47 



the calix are invariable. Like the preceding it is only an- 

 nual, and therefore distinct from the following. 



3. *Unifolia. Perennial: stem terete, virg-ate; branch- 

 es florjferous towards the summit; leaves smooth, linear, 

 acute, and subcarnose, longer than the peduncles; calix 

 truncate, campanulate; corolla large, orifice pubescent, 

 and all the lobes ciliated. Hab. From Wilmington, North 

 Carolina, to Florida. Obs. Root perennial, creeping. 

 Stems 2 or 3 feet high, branches virgate, cylindric. 

 Leaves 10 to 15 lines long, scarcely more than 1 wide, 

 very smooth and partly carnose but flat and acute, di- 

 minishing in size upwards. Flowers from 3 to 5 pair, 

 large, campanulate, and pui-ple, peduncle often more than 

 an inch long in tlie fruit. Calix remarkably truncated, 

 yet presenting 5 minute and acute dentures nearly on a 

 line with the margin. 



4. teiudfoUa. Low and much branched; stem quadran- 

 gular; leaves linear, acute, scabrous; flower funnelform; 

 style exserted; flowering peduncles nearly as long as the 

 leaves; dentures of the calix acute. Hab- Common in 

 dry and sandy forests from New York to Carolina; per- 

 fectly distinct from G. piirpwea; usually 6 to 10 inches 

 high and very much branched; flower pale purple with 

 ihe orifice smooth, (the reverse o^ purpurea) lobes of the 

 corolla dilated, approaching to otjcordate; stamina as in 

 the whole genus densely pubescent, (which is not the 

 case, if I recollect right, in Digitalis-,) peduncles often 

 equal in length with tlie upper leaves, but shorter than 

 the lower ones. The corolla of this species is remarka- 

 bly wide and shallow. 5. setacea. Leaves setaceous; 

 peduncles alternate and opposite, very long; calix obso- 

 letety toothed, capsule ovale. Hab. In the sandy forests 

 of Carolina. Annual. Peduncles often 2 inches long, 

 and remote. x\ taller plant than the preceding, which 

 produces a globose capsule, the present an ovate one ex- 

 serted beyond the calix. 



6. *aphyUa. Stem naked, virgate, with very few branch- 

 es, quadrangular, and margined, oppositely squamiferous, 

 squamcc ovate, very minute, white and deciduous; flow- 

 ers opposite, approximating towards the summits of the 

 branches; corolla somewhat funnelform, longer than the 

 primary peduncle. Hab. From North Carolina to Florida, 

 where it was first detected by Dr. Baldwyn. A very re- 

 markable and not uncommon species around Wilmington 

 in North Carolina. I have a specimen now before me 

 which is about 3 feet long, rigidly erect, and sending out 

 only 2 pair of branches; in place of leaves we perceive 

 ■only minute opposite sphacelate scales, which are ovate, 



