Buttonweed

Diodia teres

Family: Rubiaceae

Plant Description: Annual with spreading or prostrate stems to 1 m long. Leaves roughish, 2-7 cm long, elliptical or lanceolate, stipular hairs present, opposite. Flowers axillary, the corolla 4-6 mm wide, white or pinkish-lavender, petals highly pubescent.

Plant Trivia:

Field Identification:

Occurrence: Frequent on deeper sands in prairies, openings, and waste places.

Bloom Period:

Plant Use:

Key to species of Diodia:

  1. Calyx teeth 4……………………………………………………………………………………..D. teres

Calyx teeth 2…………………………………………………………………………...D. virginiana