Flora of North America species comparison

prostrate, villous.

prostrate, decumbent, ascending, erect, or floating, indumentum of simple trichomes.

sessile;

blade oval to obovate, usually as broad as long, 1.3–3 × 1.1–1.7 cm, apex rounded, pilose, glabrate.

opposite, sessile or petiolate;

blade lanceolate to ovate, ovate-rhombic, or obovate-rhombic, margins entire.

axillary, sessile;

heads stramineous, globose to ovoid, 0.6–1 × 0.6–0.7 cm;

bracts equaling tepals, apex attenuate.

axillary or terminal, sessile or pedunculate, several-flowered cylindric spikes or globose heads, without immediately subtending leaves;

bracts and bracteoles scarious.

tepals dimorphic, stramineous, lanceolate, 5–7 mm, apex acuminate, spinose tipped, sparsely villous, hairs barbed;

stamens 5;

anthers 3–5, globose;

pseudostaminodes triangular, shorter than filaments, margins dentate.

bisexual;

tepals 5, distinct;

stamens 3–5;

filaments connate basally into tube or short cup;

pseudostaminodes 5, alternating with stamens;

ovule 1;

style 1, ca. 0.2 mm;

stigma capitate or rarely 2-lobed.

lenticular, 1.3–1.5 mm.

1, reddish brown, lenticular or ovoid-oblong.

included within tepals, brown, compressed, 1.8 mm, apex truncate.

compressed, ovoid or obovoid, indehiscence.