It. peregrina: stems straggling, dwarf, or trailing over bushes to the length of several feet, clinging by means of short recurved prickles; leaves 4-6, in a whorl, ovate-oblong or lanceolate, nearly sessile; flowers small, greenish, in loose axillary or terminal panicles, rather longer than the leaves; fruit a small black two-lobed berry. - Dry woods and stony places. Fl. June to August.