23f) GAMOPETALOTTS EXOGENS 



Obs. This pretty plant is intensely bitter, and deservedly popular 

 as a tonic. The books speak of this, and all the other species, as 

 biennials, and they may be so; but I confess that our plant always 

 appeared to me like an annual, 



332. ERYTHRAE V A, Persoon. 



[Gr. Erythros, red; in allusion to the color of the flowers.] 

 Calyx 2- or 5-parted ; segments slender, appressed. Corolla funnel- 

 form, slender; border 4- or 5-lobed, withering and twisting on the 

 capsule. Anthers exserted, erect, becoming spirally twisted.- 

 Stigma 2-lipped, or sometimes capitate. Capsule sub-linear. An- 

 nuals : flowers in a dichotomous bushy panicle. 



1. E. ramosissima, Pers. var. pulchella, Griseb. Dichotomously 

 branched; leaves ovate-oblong ; flowers all pedunculate. 

 E. pulchella. Hook. # Fl. Cestr. ed. 2. p. 126. 

 MOST-BRANCHED ERYTHRAEA. 



Stem 2 to 6 inches high, 4-angled and slightly winged, sometimes brachiately 

 branched, rarely simple. Leaves about half an inch long, rather acute. Flowert 

 axillary, solitary, or terminating the branches in pairs, generally one in the 

 forks of the stem r branches, on angular peduncles % to near half an inch in 

 length ; calyx 5-angled, 5-parted ; segments subulate, at first nearly as long as the 

 corolla-tube, finally little more than half as long ; corolla, with the border bright 

 red, the lobes mostly erect, the tube yellowish-green, near half an inch long. 

 .Bofc. Great Valley. Nat. of Europe. 1*1. July. Fr. Aug. 



Obs. This delicate little plant is naturalized, in a few localities, 

 in Chester, and the adjoining county of Lancaster. 



f f Style (if any) and stigmas persistent ; anthers straight. 



BARTO V JVIA, Muhl. 



[Dedicated to Prof. B. S. Barton, of the University of Pennsylvania.] 

 Calyx deeply 4-parted, appressed. Corolla subcampanulate, 4- 

 parted, destitute of folds, fringes, or glands. Stamens short. Ovary 

 tapering into a very short style ; stigma 2-lobed, the lobes decur- 

 rent on the style. Small smooth annuals: stems filiform; leave* 

 scale-like, or subulate; flowers terminal, subpaniculate. 



1. B. tenella, Muhl. Stem paniculate above; leaves subulate, 



appressed; peduncles opposite. 



B. paniculata. FL Cestr. ed. 2. p. 111. 



DELICATE BARTONIA. 



Plant yellowish-green. Stem 3 or 4 to 10 or 12 inches high, angular by the 

 decurrence of the leaves, often twisted. Leaves scarcely % of an inch in length. 

 flowers often terminating the branches in threes ; peduncles about % of an inch 

 long, bracteate at base; corolla pale greenish-yellow, longer than the calyx. 

 Capsule oblong, compressed, 1-celled, 2-valved, with sutural placentae ; seeds num- 

 erous, minute, reddish. 

 Sab. Moist, low grounds ; clearings, &c. : frequent. Fl. Aug. Fr. Octo. 



334. GEtfTIAWA, L. 



[Named from Gentius, king of Illyria; who, it is alleged, first used it.] 

 Calyx 4- or 5-cleft. Corolla 4- or 5-lobed, usually with interme- 

 diate plaited folds, which bear appendages at the sinuses. Stamtns 



