Flora of North America species comparison

absent;

roots fibrous or a slender taproot.

ascending, simple.

in single or multiple basal rosettes, simple;

petiole absent or obscure, slightly winged;

blade lanceolate to spatulate or cuneate, base attenuate, cuneate, or truncate, margins entire or moderately dentate, apex acute to obtuse (often dentate), surfaces usually hairy, hairs grayish white, simple or forked.

1–25.

umbels, 2–20-flowered, involucrate;

bracts 1–10.

absent or erect to arcuate, elongating with age.

homostylous;

sepals 5, green, calyx broadly campanulate to subglobose or hemispheric, ± 5-angled, not keeled, glabrous, pilose, or puberulent, lobes shorter than tube;

petals 5, white, sometimes fading to pink in age [pink to shades of red], corolla campanulate to salverform, tube yellow, ± inflated, lobes shorter than tube, apex emarginate to entire;

stamens included;

filaments indistinct, very short;

anthers not connivent.

globose to subglobose, valvate, dehiscent nearly to base.

usually 3–4 in perennial species, 20–50+ in annual species, brown, 4-angled to somewhat trigonous, reticulate to almost smooth.

America

= 10.