Flora of North America species comparison

shallowly 4-lined at first, then terete.

internodes with 2 or 4 raised lines at first, then terete (not lined).

sessile, sometimes amplexicaul;

blade broadly ovate or triangular-ovate to oblong, 15–50(–70) × 10–40(–50) mm, base usually ± shallowly cordate, rarely truncate, apex rounded to retuse, gland dots laminar (relatively dense) and intramarginal.

sessile, subsessile, or petiolate;

blade relatively broad, venation pinnate, tertiary veins densely reticulate, glands punctiform, pale (records of black gland dots are probably all due to fungal attack), intramarginal and laminar.

terminal, sometimes also axillary, cymose, 2–15-flowered, or solitary flower, branching dichasial;

bracts and bracteoles relatively small.

tubular or campanulate at first, expanding to stellate for short time each day;

sepals persistent, 5, distinct or almost so, margins not glandular-ciliate;

petals deciduous, 5, partly imbricate or contorted, pink or flesh-colored, sometimes green-tinged;

stamens persistent, 9, in 3 fascicles, each with 3 stamens;

filaments of each fascicle 1/5–1/2+ connate;

anthers yellow, isodiametric to oblate or shortly oblong, with amber gland on connective;

staminode fascicles 3, alternating with stamen fascicles;

ovary 3-merous;

placentation axile;

ovules relatively numerous on each placenta;

styles distinct, spreading.

3-valved, with glandular vittae.

narrowly cylindric, carinate;

testa reticulate-foveolate.

= 19.