158 CLASS VIII. ORDER I. 



American, is now naturalized, and very common throughout 



Europe. — Biennial. 



OENOTHERA PUMiLA. L. Dwarf Tree Primrose. 



Leaves lanceolate, very entire, obtuse ; capsules 

 sliglitly pedicelled. elliptic-obovate, angular. W'dld. 



Stem oblique at base, ascending, round, slender, about a foot 

 high. Leaves sessile, blunt. Flowers yellow, small, nearly ses- 

 sile, in a leafy spike. Petals inversely heart-shaped. Stamens 

 shorter than the corolla. Capsules inversely ovate, with eight 

 angles. — Pastures. — Perennial. 



This plant is exactly the OE. pumila of Custis' magazine, 

 t. 355. 



174. RHEXIA. 

 Rhexia ViRGiNicA. L. Virginian Rhexia. 



Stem with four winged angles ; leaves sessile, 

 oval-lanceolate, serrate-ciliate, calyx with glandular 

 hairs. 



Stem square with membranous angles. Leaves opposite, oval, 

 three nerved, with scattered hairs on both sides and on the mar- 

 gin. Peduncles axillary and terminal. Calyx urn-shaped, hairy, 

 with four acute segments; petals purple and finely contrasted 

 with the long, crooked, yellow anthers. Style declining. — Low 

 grounds. — July, August. — Perennial. 



175. MENZIESIA. 

 Menziesia ccerulea. Swz. Purple Menziesia. 



Leaves scattered, crowded, linear, obtuse, cartila- 

 ginously denticulate ; peduncles terminal, aggregate, 

 one-flowered; flowers campanulate, decandrous ; ca- 

 lyx acute. 

 Syn. Ekica ccerulea. Willd. 



A beautiful alpine shrub, resembling a heath in its foliage and 

 flowers. The leaves are not unlike those of the fir tribe. Pe- 

 duncles and calyx pubescent. Calyx in five segments, purplish, 

 oblong-linear, obtuse. Corolla purple, cylindric-ovate, divided 



