OregonFlora species comparison

oblanceolate to elliptic or ovate, 3–10 mm, occasionally with central red spot;

margins entire to shallowly toothed;

tips rounded;

surfaces glabrous;

petioles 0.3–1 mm;

stipules linear, often dissected, 1–1.5 mm.

cauline, alternate (upper leaves sometimes whorled) or occasionally opposite, 1–15 cm;

surfaces usually glabrous, petiolate or sessile;

stipules 0 or greatly reduced.

involucres 0.5–1 mm, glabrous;

glands elliptic;

gland appendages white.

multiple individual flowers grouped into a cyathium of 5 groups of 5–many staminate flowers around a pistillate flower;

involucres usually with 4–5 prominent glands;

glands often with horn-like projections.

sepals 0;

petals 0.

;

stamens 1.

1; central;

styles fused at base.

ovoid, 1.5–2 mm, glabrous.

ovoid, 1–1.5 mm; cross-ridged.