OregonFlora species comparison

10–25 cm tall.

basal, 1, clasping base of stem, obovate to oblanceolate, 5–8 × 1.5–3 cm, green through anthesis.

simple;

basal, or cauline, alternate; opposite, or whorled, plicate; convolute, conduplicate, cylindric, or flattened;

margins entire, petioled or not;

stipules 0.

loosely 10–15-flowered.

racemes; panicles; spikes, or rarely cymose;

flowers 1 to many; terminal or lateral, generally with bracts.

more or less spreading, green to greenish white;

dorsal sepal broadly ovate with blunt apex, 2–5 × 2–4 mm;

lateral sepals lanceolate and oblique, 3–5 × 1.5–2 mm, strongly reflexed;

petals lanceolate, oblique, tapering abruptly at middle, 2–4 × 1–2 mm;

lip narrowly lanceolate, 3–6 × 1–2 mm, descending and reflexed;

spur cylindrical and tapering; as long or longer than lip; to 10 mm.

bisexual, usually strongly bilaterally symmetric;

sepals 3, often petaloid;

petals 3, highly modified; central petal modified into lip;

stamens 1 or 2 (rarely 3); opposite lip, fused to style to form column;

pollen generally aggregated into 2–8 pollinia;

ovary inferior, 3-carpellate with 1 or 3 locules;

style fused to anther filaments;

stigma 3-lobed with middle stigma lobe modified into a small beak (rostellum).

capsules.

numerous; minute and dust-like, lacking endosperm.