Erect or diffuse slender herbs, with opposite leaves, and small axillary or terminal solitary or clustered, white or pink flowers. Calyx-tube obovoid or subglobose, the limb 4-toothed. Corolla rotate or salverform, 4-lobed. Stamens 4, inserted on the throat of the corolla; anthers oblong. Ovary 2-celled; ovules numerous in each cavity; style slender, 2-lobed. Capsule small, ovoid, top-shaped, or hemispheric, wholly adnate to the calyx-tube, loculicidally dehiscent at the summit, several or many-seeded. Seeds angular, not peltate; endosperm fleshy; embryo club-shaped. [Named for H. B. Oldenland, a Danish botanist.]

About 175 species, mostly of tropical distribution, most abundant in Asia. Besides the following, 2 others occur in the Southern States and 1 in New Mexico. Type species: Oldenlandia corvmbosa L.

2 Oldenlandia Plumier L Sp Pl 119 1753 593

1. Oldenlandia Uniflora L. Clustered Bluets

Fig. 3922

Oldenlandia uniflora L. Sp. Pl. 119. 1753.

Oldenlandia glomerata Michx. Fl. Bor. Am. 1: 83. 1803.

Annual, weak, usually tufted, more or less hirsute-pubescent, diffuse or ascending; stems 1'-15' long. Leaves short-petioled or sessile, mostly thin, entire, 3-5-nerved, ovate, oblong, or oval, acute at the apex, narrowed at the base, 1/2'-1' long; flowers sessile or nearly so, white, about 1" broad, terminal and axillary, clustered or solitary; calyx hirsute, hemispheric in fruit, the ovate or oval lobes erect and nearly equalling the tube.

In low grounds, southern New York to Florida and Texas, north to Arkansas and reported from Missouri. Also in Cuba and Jamaica. June-Sept.