Flora of North America species comparison

erect, decumbent, or sprawling; unbranched.

petiole 0.5–4 cm;

rachis 2.5–5 mm;

leaflets 3–7, 7–12 × 1–3.5 mm, apex obtuse or acute.

alternate, simple or compound;

venation pinnate;

stipules absent;

petiole present;

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

axillary, flowers solitary;

bracts absent.

0.5–2 cm (± equal to subtending petiole at anthesis, elongating 1.5 times by fruit maturity).

present.

sepals green, 5-nerved, 2–6 mm;

petals white, greenish white, or pale pink, oblanceolate to narrowly elliptic, 1.4–2 mm;

filaments filiform, 1–1.5 mm;

anthers yellowish, broadly ellipsoid, 0.2–0.3 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.

green to brown, somewhat fleshy, 2–3.5 × 2–3 mm (often only 1 seed maturing per flower).

= 10.