[Sidenote: =Elæagnus argentea= Pursh. _Silver-Berry._] A stoloniferous much branched shrub sometimes 12 feet high, the young twigs covered with brown scurf, becoming silvery. Leaves oblong-ovate or ovate-lanceolate, densely silvery-scurfy on both sides, acute or obtuse short petioled, 1—4 inches long. Flowers usually numerous in the axils of the leaves, fragrant, silvery, ½ an inch or more long; perianth silvery without, yellowish within, the lobes ovate and short. On the eastern slope of the Rockies, on the banks of the rivers and streams, very abundant at Banff on the Bow and Spray rivers; flowering in June. [Sidenote: =Lepargyræa canadensis= (L.) Greene. _Canadian Buffalo-Berry._] A shrub 4—8 feet high, with brown-scurfy young shoots. Leaves with short petioles, ovate or oval, obtuse at the apex, rounded or some of them narrowed at the base, 1—1½ inches long, green and sparingly scurfy, stellate above, densely silvery, stellate, scurfy beneath, some of the scurf usually brown. Flowers small, yellowish, in short spikes at the nodes of the twigs, expanding with or before the leaves; fruit showy ¼ of an inch in diameter, translucent, varying in colour on different plants from orange to brilliant crimson. Thickets and wooded banks throughout the Rockies; flowering in May or early June. ONAGRACEÆ _Evening Primrose Family_ Herbs, with alternate or opposite leaves and perfect flowers; calyx tube adnate to the ovary, 2—6 lobed; petals white, yellow, pink, or purple, folded on each other in the bud; stamens usually as many or twice as many as the petals. Parts of the flower in 4’s; seeds with tufts of hair on the ends. Calyx tube not prolonged beyond the ovary; flowers large. =Chamænerion.= Calyx tube prolonged beyond the ovary; flowers usually small. =Epilobium.= Parts of the flowers in 2’s; fruit with hooked hairs. =Circæa.= [Sidenote: =Chamænerion angustifolium= (L.) Scop. _Great Willow-herb, Fire-weed._] Erect, stout, simple or branched, usually smooth, 2—8 feet high. Leaves numerous, alternate, very short petioled, lanceolate, entire or denticulate, 2—6 inches long, ¼—1 inch wide, pale beneath, thin, acute at the apex, the lateral veins confluent in marginal loops. Flowers ¾—1½ inches broad, reddish-purple, in elongated terminal spike-like racemes, 1—2 feet or more long. An abundant plant throughout the entire region on open mountain sides and banks, especially where visited by fire, flowering throughout the summer, the air being filled with the white cottony seeds a few weeks after flowering commences. [Sidenote: =Chamænerion latifolium= (L.) _Sweet Broad-leaved Willow-herb._]