Class V. Order I. tf9 



Dewey. Found on the borders of alpine ponds on the While 

 mountains by Mr. Greene. June, July. 



94. DIERVILLA. 



DIERVILLA CANADENSIS. Muhl. Yellow Dlervilla. 



Racemes terminal ; leaves serrate. 



Syn. LONICESA DIERVILLA. L. 



This shrub with us is usually of small size. Leaves opposite, 

 on short petioles, ovate, smooth, serrate, acuminate. Flowers of 

 a pale yellow ; small, funnel shaped, with five roundish, unequal 

 segments. They grow in the axils of the upper leaves. Woods, 

 Cambridge, Brookline. June. 



95. TRIOSTEUM. 



TRIOSTEUM PERFOLIATUM. L. Fever root. 



Bigelow, Medical Botany, PI. ix. 



Leaves connate, flowers sessile, whorled. 



Syn. TRIOSTEUM MAJUS. MX. 



The root of this plant is perennial and subdivided into nume- 

 rous horizontal branches. The stem is erect, hairy, fistulous, 

 round, from one to four feet high. Leaves opposite, the pairs 

 crossing each other, connate, ovate, acuminate, entire, rather 

 flat, abruptly contracted at base into a sort of neck, resembling 

 a winged petiole, of variable width. In general this is narrow 

 when the plant is in flower, and wider when it is in fruit. The 

 flowers are axillary, sessile, five or six in a whorl, the upper 

 ones generally in a .-ingle pair. Each axil is furnished with 

 two or three linear bractes. The calyx consists of five seg- 

 ments which are spreading, oblong-linear, coloured, unequal, 

 persistent. Corolla tubular, curving, of a dull brownish purple 

 covered with minute hairs, its base gibbous, its border open anil 

 divided into five rounded, unequal lobes. Stamens inserted in 

 the tube of the corolla; stigma peltate. The fruit is an oval 

 berry of a deep orange yellow, hairy, somewhat three sided, 

 crowned with the calyx, containing three cells, and three hard, 

 bony, furrowed seeds, from which the name of the genus is 

 taken. Woods, Sweet Auburn, Cambridge. June. Perennial 



The root is medicinal. 

 12 



