General: Annual herb from a slender taproot; stems very leafy, 5-20 cm tall, simple or branched below, usually glabrous, sometimes greyish-hairy.
Leaves: Linear to linear-spoon-shaped, 0.5-3 cm long, 1-2 mm wide, entire, not significantly reduced above.
Flowers: Inflorescence a crowded spike, the bracts leaf-like and hiding flowers and fruits, the flowers opening at dawn; hypanthium about 0.2 mm long; petals 0.8-1.5 mm long, white to pinkish; sepals about 1 mm long; largest stamens about 0.7 mm long; ovaries glabrous or glandular fine-hairy.
Fruits: Capsules, 7-15 mm long, linear to somewhat club-shaped, smooth or very slightly constricted between seeds, the lateral 2 valves staying attached; unstalked or nearly so; seeds 24-50, nearly opposite when compared between chambers, ascending at an oblique angle, 0.5-0.75 mm long, glabrous to fine-hairy.
If more than one illustration is
available for a species (e.g., separate illustrations were provided for two
subspecies) then links to the separate images will be provided below.
Note that individual subspecies or varietal illustrations are not always available.