242 DICOTYLEDOiNOUS PLANTS. 



5. S. chloroides Pursh : stem weak, somewhat angled; leaves Ian- 

 ceolate, erect; branches few, 1-flowered ; flowers 7 12-parted; seg- 

 ments of the calyx linear, shorter than the corol. Ckironia chloroides. 

 Mich. C. dodecandra Walt. Chlora dodecandra Linn. 



HAB. Salt bogs. N. Y. to Car. Aug. $ .Stem 2 3 feet high. 

 Leaves closely sessile, acute, without nerves. Flowers solitary, 

 terminal, bright rose coloured. This and the preceding are very 

 variable. 



6. S. corymbosa Bald. : stem erect, nearly square; leaves ovate, close- 

 ly sessile ; flowers corymbed ; segments of the calyx subulate, much 

 shorter than the corol. S. paniculata van a. Pursh. Chironia lanceolata 

 Walt. 



HAB. Swamps. N. J. to Car. Aug., Sept. Z. Stem a foot 

 high, branched near the summit. Leaves somewhat clasping. 

 Corymb few-flowered. Corol white, 4 6-parted. 



5. ERYTHR^EA. Rich. 



Calyx 5-cleft. Corol funnel-form ; limb short, 5-cleft, 

 spreading. Stamens 5. Anthers, after flowering, spiral. 

 Style erect. Stigmas 2, roundish. Capsule 1-celled, linear. 



Pentandria. Monogynia* 



E. centaurium Pers. : stem erect, nearly simple ; leaves ovate-oblong, 

 nerved ; flowers subsessile, fasciculate-paniculate ; calyx half as long 

 as the tube of the corol. Chironia centaurium Willd. 



HAB. Dry grounds. N. S. July, Aug. <>. Stem 8 12 inches 

 high. Leaves variable ; the lower ones broader than the upper. 

 Flowers in fascicles, near the top of the steui. I have specimens 

 of this plant which were found near Oswego, N. Y. by the Rev. 

 David Brown of Lockport. It is apparently indigenous. 



6. EXACUM. Linn. 



Calyx deeply 4-parted. Corol 4-lobed, with the tube glo- 

 bose. Stame?is 4. Style I . Stigma 2-cleft. Capsule bi- 

 sulcate, 2-celled, many-seeded. Teirandria. Monogynia. 



E. pulchdlum Pursh : calyx 4-partedj corol 4-clefl, segments subu- 

 late ; panicle corymbed ; peduncle filiform. 



HAB. Sea Coast. N. J. rare. Aug. f>. Flowers rose co- 

 loured. 



7. HOUSTONIA. Linn. 



Calyz 4-cleft. Corol funnel-form, 4-cleft. Stame?is 4. 

 Stigma simple. Capsule half superior, 2-cdled, 2-valved, 

 many-seeded, opening transversely. 



Tetrandria. Monogynia. 



1. If. cotndea Linn. : stem erect, setaceous, dichotomous ; radical 

 leaves spatulate-oval ; stem leaves lanceolate ; peduncles solitary, ax- 



