Plant: shrubs, intricately or divaricately branched, spinescent Leaves: distant; apices not spine tipped; stipules absent or if present minute, subulate, 0.1-0.9 mm long, attached to the persistent glandular petiole base Flowers: solitary, axillary or terminal on short shoots; glandular disk lining the hypanthium; sepals (4-)5(-6), lanceolate, ovate, or circular, 4-5 mm long, persistent; petals (4-)5(-6), white, narrowly lanceolate to broadly oblanceolate, deciduous, 6-10 mm long; stamens 6-10; carpels 1(-3), sessile; stigma discoid Fruit: FRUITS striated; SEEDS 1-2 with a circular, irregular, whitish aril Misc: on limestone, canyons, hillsides, cliffs; 850-2200 m.; Apr-May REFERENCES: Mason, Charles T., Jr. Crossosomataceae. . Ariz.-Nev. Acad. Sci. 26(1):2