PENTANDEIA. MONOGYKIA. 139 



the persistent callx, 4-celIed, 4-seeded, 2 of the 

 cells sometimes abortive. 



Erect shrubs; flowers small, cong'Iomerate and axillary, 

 or in short terminal, racemes, smooth or internally pube- 

 scent as in Mifchella. 



Species. 1. S. glomerata {T.ohicera Sumphoricarpos. 

 Willd. Spec. Plant. 1. p. 989.) Partial racemes axillary, 

 crowded, imbricated in four ranks; flowers cylindric- 

 campanulate, bractea 3-leaved.— Flowers greenish-red; 

 berries bluish-purple. From Virginia to Florida; in 

 Tennessee and up the Missouri to its sources. Com- 

 mon. 2. racemosa. Berries large, opaque, and white— 

 In Upper Canada, not far from Queenston on the Niagara 

 river; near the outlet of Lake Huron, and on the banks 

 of the Missouri. Not rare. This genus is confined to 

 North America. Allied to Mitchella? 



215. DIERVILLA. TourneforU Juss, 



Calix oblong. 5-cleft, bracteate at the base. 

 Corolla double'the lengtli of calix, fuiiiielform, 

 5-cleft, spreading. Stigma capitate. Capsule 

 oblojjg, naked, acute, 4-celled, many-seeded. 

 Seeds minute. 



A shrub with entire serrated leaves; peduncles axillary 

 and terminal, dichotomous, mostly 3-flowered; flowers 

 yellow. 



Species. 1. J)- Toiimeforti. The only species of the 

 genus: and exclusively indigenous. 



£16. TRIOSTEUM. L, (Fever-wort.) 



Calix 5-cleft, persistent, nearly the length of 

 the corolla; segments linear, acute. Corolla 

 tubulous, 5-iobed, subequal, base nectariferous, 

 gibbous. Stigma somewhat 5-Iobed, capitate. 

 jbernj 3-celled, 3-seeded, crowned with the calix. 



Herbaceous; stem simple; leaves opposite, entire, most- 

 ly connate; flowers axillary, sessile, usually by threesj 

 rarely solitary, calix bibracteate. 



Species. 1. T. perfoUatum. Leaves undulated on the 

 margin and hirsute al)ove. Calix, corolla and younger 

 stems, viscosely-pubescent. 2. angustifolium. — This genus 



