Flora of North America species comparison

procumbent, pubescent in lines, glabrate.

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

sessile;

blade elliptic to oblong or oblanceolate, 1.2–5 × 0.5–2.2 cm, apex obtuse to acute, glabrous.

opposite, sessile or petiolate;

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

axillary, sessile;

heads white, subglobose or ovoid, 0.5–1.1 cm;

bracts keeled, ca. 1/2 as long as tepals.

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

bracts and bracteoles scarious.

tepals white, ovate to lanceolate, 2–3.5 mm, apex acuminate, hairs not barbed;

stamens 5;

anthers 3–5, globose;

pseudostaminodes subulate, margins laciniate.

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, 0.9–1.1 mm.

1, reddish brown, lenticular or ovoid-oblong.

included within tepals, sides exerted in mature fruit, greenish stramineous, obcordate, 1.3–1.7 mm, apex retuse.

compressed, ovoid or obovoid, indehiscence.