Flora of North America species comparison

glabrous.

decumbent.

erect, decumbent, or sprawling; unbranched.

alternate, simple or compound;

venation pinnate;

stipules absent;

petiole present;

blade margins entire or pinnately lobed, bipinnate, or ternate.

axillary, flowers solitary;

bracts absent.

present.

cup-shaped;

sepals not accrescent, lanceolate to lanceolate-ovate, 7.5–8 mm, abaxially and adaxially glabrous;

petals oblong, 7.5–8.5 mm, apex obtuse (not emarginate);

filaments 4.2–4.7 mm;

anthers ± 1 mm, usually dehiscing introrsely;

style 3–3.5 mm.

usually bisexual, usually actinomorphic, rotate;

perianth and androecium hypogynous;

sepals usually persistent, 3 or 5 (4 in Limnanthes macounii), distinct or slightly connate basally, equal or unequal;

petals same number as sepals, convolute in bud, distinct, equal;

nectary glands present;

stamens 3, 6, 8, or 10 (same or twice the number of sepals);

filaments distinct, glabrous;

anthers dehiscing by longitudinal slits, introrse or extrorse, tetrasporangiate, pollen shed in single grains, binucleate, 2–4-aperturate, colpate or colporate;

disc absent;

gynophore absent;

pistil 1;

ovary 2–5-carpellate, syncarpous basally (united by gynobasic style);

placentation basal;

ovules 1 per locule, anatropous, unitegmic;

style 1 (gynobasic);

stigmas (2 or) 3–5 (dry, papillate).

schizocarps (mericarps or nutlets), tuberculate, ridged, smooth, or rugulose.

1;

not arillate;

endosperm absent.

3–5, tubercles broad-based, platelike cones.