Fruit a berry or drupe. Calyx becoming large and fleshy. =Gaultheria.= Calyx small. Leaves thick and leathery; drupe reddish-brown. =Arctostaphylos.= Leaves membranous, veiny; drupe scarlet. =Mairania.= Fruit a dry capsule. Anther cells each with a recurved tip. =Cassiope.= Anther cells not appendaged. Corolla with united petals. Bracts firm, persistent; no scaly leaf-buds. Leaves heath-like; corolla without pouches. =Phyllodoce.= Leaves lanceolate; corolla with pouches. =Kalmia.= Bracts thin, deciduous; leaf-buds scaly. Corolla funnel-form, 5-lobed. =Azaleastrum.= Corolla globose, 4-toothed. =Menziesia.= Corolla with distinct petals. Flowers white, umbelled; leaves evergreen. =Ledum.= [Illustration: _a_ Oxycoccus oxycoccus (L.) MacM. Small Cranberry. _b_ Gaultheria ovatifolia A. Gray. Ovate-Leaved Wintergreen. _c_ Vitis-idæa vitis-idæa (L.) Britton. Mountain Cranberry. (¾ Nat.)] [Sidenote: =Gaultheria ovatifolia= A. Gray. _Ovate-leaved Wintergreen._] Depressed, trailing, with ascending branches with rusty hairs. Leaves broadly ovate, ½—1 inch long, serrulate, dark green and shining above, lighter beneath. Flowers pink or nearly white, campanulate, less than ¼ of an inch long, on short solitary pedicels in the axils of the leaves; fruit bright scarlet, ⅓ of an inch in diameter. A rather rare plant in the region but abundant in places on the slopes of Avalanche Mountain at Glacier. [Sidenote: =Gaultheria humifusa= (Graham) Rydb. _Low Wintergreen._] Tufted, creeping or depressed, smooth, the flowering branches 1—5 inches long. Leaves oval or rounded, mostly only ½ an inch long; pedicels solitary in the axils, very short, 3—5 bracteolate. Flowers depressed-campanulate, white or pinkish, little surpassing the calyx; fruit scarlet, ⅓ of an inch in diameter. Common in alpine meadows throughout the Rockies and Selkirks; flowering in July. [Sidenote: =Arctostaphylos Uva-Ursi= (L.) _Spreng. Bear-berry._] Trailing or spreading on the ground; branches 6—24 inches long, the twigs soft-hairy. Leaves leathery, evergreen, spatulate, obtuse, entire, smooth or minutely hairy toward the base, ½—1 inch long, ⅓ as wide, short-petioled. Flowers ¼ of an inch or less long, ovoid, constricted at the throat, rosy pink or white, few, in short racemes at the ends of the branches. In dry sandy or stony soil throughout the Rockies at the lower elevations; flowering in early June. [Sidenote: =Mairania alpina= (L.) Desv. _Alpine Bear-berry._]