Shrubs, with opposite leaves, and yellow axillary and terminal cymose or solitary flowers. Calyx-tube slender, elongated, narrowed below, the limb with 5 linear persistent lobes. Corolla narrowly funnelform, the tube slightly gibbous at the base, the limb nearly regular, 5-lobed. Stamens 5, inserted on the corolla; anthers linear. Ovary 2-celled; ovules numerous in each cavity; style filiform; stigma capitate. Fruit a linear-oblong capsule, narrowed or beaked at the summit, septicidally 2-valved, many-seeded. Seed coat minutely reticulated; endosperm fleshy; embryo minute. [Named for Dr. Dierville, who brought the plant to Tournefort]

Three species, the following typical one, the others in the mountains of the Southern States. The Japanese and Chinese Weigelas, often referred to this genus, are here regarded as distinct.

1. Diervilla Diervilla (L.) Macm. Bush-Honeysuckle

Fig. 3993

Lonicera Diervilla L. Sp. Pl. 175. 1753. Diervilla Lonicera Mill. Gard. Dict. Ed. 8. 1768. Diervilla trifida Moench, Meth. 492. 1794. D. Diervilla MacM. Bull. Torr. Club 19: 15. 1892.

A shrub, 2°-4° high, glabrous or nearly so throughout, with terete branches. Leaves short-petioled, ovate or oval, acuminate at the apex, usually rounded at the base, 2's' long, irregularly crenulate and often slightly ciliate on the margins; peduncles terminal, or in the upper axils, slender, 1-5-flowered; flowers about 9" long; corolla more or less pubescent both without and within, regular or slightly irregular, 3 of its lobes somewhat united; capsule glabrous, linear-oblong, slender, beaked, crowned with the persistent calyx-lobes.

In dry or rocky woodlands, Newfoundland to Manitoba, North Carolina, Michigan and Wisconsin. Gravel-weed. Life-of-man. May-June.

1 Diervilla Diervilla L Macm Bush Honeysuckle 664