Calyx 4-lobed, persistent. Corolla short, in our species wheel-shaped; the limb 4-parted, valvate in the bud. Stamens 4; anthers short. Style 1 or none; stigmas 2. Pod thin, 2-celled, many-seeded, opening loculicidally across the summit. Seeds very numerous, minute and angular.--Low herbs, with small stipules united to the petioles. (Dedicated to the memory of _Oldenland_, a German physician and botanist, who died early at the Cape of Good Hope.) 1. O. glomeràta, Michx. An inconspicuous, pubescent or smoothish, branched and spreading annual (2--12´ high); leaves ovate to oblong; flowers in sessile axillary clusters; corolla nearly wheel-shaped (white), much shorter than the calyx.--Wet places, near the coast, N. Y. to Fla. and Tex. 3. CEPHALÁNTHUS, L. BUTTON-BUSH. Calyx-tube inversely pyramidal, the limb 4-toothed. Corolla tubular, 4-toothed; the teeth imbricated in the bud. Style thread-form, much protruded. Stigma capitate. Fruit dry and hard, small, inversely pyramidal, 2--4-celled, at length splitting from the base upward into 2--4 closed 1-seeded portions.--Shrubs, with the white flowers densely aggregated in spherical peduncled heads. (Name composed of κεφαλή, _a head_, and ἄνθος, _a flower_.) 1. C. occidentàlis, L. Smooth or pubescent; leaves petioled, ovate or lanceolate-oblong, pointed, opposite or whorled in threes, with short intervening stipules.--Swamps and along streams, throughout the continent. July, Aug. 4. MITCHÉLLA, L. PARTRIDGE-BERRY. Flowers in pairs, with their ovaries united. Calyx 4-toothed. Corolla funnel-form, 4-lobed; the lobes spreading, densely bearded inside, valvate in the bud. Stamens 4. Style 1; stigmas 4, linear. Fruit a berry-like double drupe, crowned with the calyx-teeth of the two flowers, with 4 small seed-like bony nutlets to each flower.--A smooth and trailing small evergreen herb, with round-ovate and shining petioled leaves, minute stipules, white fragrant flowers often tinged with purple, and scarlet edible (but nearly tasteless) berries, which remain over winter. Flowers occasionally 3--6-merous, always dimorphous; all those of some individuals having exserted stamens and included stigmas; of others, included stamens and exserted style. (This very pretty plant commemorates _Dr. John Mitchell_, an early correspondent of Linnæus, and an excellent botanist, who resided in Virginia.) 1. M. rèpens, L.--Dry woods, creeping about the foot of trees, especially Coniferæ, throughout our range and southward. June, July.--Leaves often variegated with whitish lines. Rarely the two flowers are completely confluent into one, with a 10-lobed corolla. 5. SPERMACÒCE, Dill. BUTTON-WEED.