OregonFlora species comparison

widely branched, 50 cm × 0.1–0.7 mm long; terete; lower stems rhizomatous; upper stems erect and leafy.

widely branched, 50 cm × 0.1–0.7 mm long; terete; lower stems rhizomatous; upper stems erect and leafy.

submersed, 3–10.5 cm × 1 mm;

apex more or less obtuse;

stipules adnate to the petiole, 5–15 mm long; the free ends 1–5 mm long.

submersed, 3–10.5 cm × 1 mm;

apex more or less obtuse;

stipules adnate to the petiole, 5–15 mm long; the free ends 1–5 mm long.

terminal; head-like spikes;

flowers less than 20;

peduncles with 0–4 coils, 0.5–16.5 × 0.5 mm at flowering time, elongating and 5–30 mm long in fruit, becoming stalk-like after flowering and lifting the flowers to the surface; later often becoming coiled and submerging;

bract 1.

terminal; head-like spikes;

flowers less than 20;

peduncles with 0–4 coils, 0.5–16.5 × 0.5 mm at flowering time, elongating and 5–30 mm long in fruit, becoming stalk-like after flowering and lifting the flowers to the surface; later often becoming coiled and submerging;

bract 1.

perianth 0;

stamens 2;

anthers more or less sessile;

pistils 2–8; simple;

stigmas sessile.

perianth 0;

stamens 2;

anthers more or less sessile;

pistils 2–8; simple;

stigmas sessile.

inconspicuously to short-beaked, slightly recurved; turgid, obliquely ovoid to oblong, 1.8–3 × 0.7–1.5 mm; stalk-like at base.

inconspicuously to short-beaked, slightly recurved; turgid, obliquely ovoid to oblong, 1.8–3 × 0.7–1.5 mm; stalk-like at base.

=20.

=20.