Annual or perennial herbs, hairy or glabrous; stems prostrate to erect, 4-angled. Leaves opposite or falsely whorled, sessile or shortly petiolate; stipules united to form a short sheath, with 1-many, +/- filiform fimbriae. Flowers axillary, in dense, sessile, globose masses. Calyx 4-lobed, usually persistent; lobes triangular, oblong or lanceolate; tube obovoid, turbinate or obconic. Corolla 4-lobed, white; lobes spreading, acute or obtuse, hairy or glabrous; tube slender, funnel-shaped. Stamens 4; filaments arising in tube or at throat; anthers linear to oblong, included or exserted. Ovary 2-locular; ovule 1 per locule, attached to middle of septum; style filiform, exserted, with bilobed stigma. Fruit usually a 2-valved capsule dehiscing from apex downwards with septum disappearing. x = 7 (polyploidy).
Species 100, warm regions of America; 5 in sthn Afr., not recorded in Free State, Lesotho and Western Cape.

Add new comment

To prevent automated spam submissions leave this field empty.
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Enter the characters shown in the image.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith