OregonFlora species comparison

stout and thickened, elongate taproots or stout and irregularly thickened taproots.

elongate and slender taproots or globose or irregularly thickened tubers with an elongate upper section < 2 cm, tapered abruptly at base into an elongate and slender taproot.

2–3-branched or multicipital;

basal leaf sheaths from previous years weathering into a fibrous thatch at or below ground level;

peduncles persistent in thatch as gray stalks.

simple;

basal leaf sheaths from previous years absent or weathering into a few fibers or a sparsely chartaceous thatch at base of stem.

9–20 dm; stout but not inflated; pseudoscapes absent.

10–30 cm; pseudoscapes absent.

glabrous;

primary leaflets pinnate, 3–7 secondary leaflet pairs along each rachis (mature basal leaves may have more pairs; but these are not usually collected for specimens);

laterals less than half of central primary in length;

secondaries pinnate or pinnatifid;

tertiaries entire or pinnatifid (2–4-lobed), ultimate apical lobes linear, narrowly oblong, narrowly elliptic, 10–30 × 1–3 mm;

tips acute, acuminate, or subacute, mucronulate or not.

glabrous, glabrate or sparsely puberulent or pubescent;

primary leaflets pinnate, 2–6 secondary leaflet pairs along each rachis;

laterals less than half central primary in length;

secondaries entire, pinnate, or pinnatifid (3–5-lobed);

tertiaries absent or entire, ultimate apical lobes linear, narrowly elliptic, or narrowly oblong, 5–15 × 0.5–2 mm;

tips acute, subacute, or rounded.

1–3, similar to basal.

1–3, similar to basal.

peduncles 1–4 (more in robust plants), ascending or erect; stout but not inflated, 30–80+ cm;

involucral bracts 0;

rays 8–20, 3–11 cm, glabrous;

involucel bractlets 4–6, linear or lanceolate, 5–10 × 0.3–1 mm, unlobed or 2-lobed;

margins narrowly scarious or not;

umbellets 10–40-flowered;

pedicels 6–17 mm.

peduncles 1–4, ascending or erect, 8–20 cm, glabrate below or sparsely to moderately pubescent or puberulent above;

involucral bracts 0;

rays 1–6, 1–5 cm, glabrate or sparsely puberulent;

involucel bractlets 0–6, linear, 2–4 × 0.2–0.5 mm;

margins scarious;

umbellets 7–15-flowered;

pedicels 5–15 mm.

petals yellow;

anthers ochroleucous or yellow.

petals ochroleucous or yellow;

anthers ochroleucous or yellow.

oblong, 15–25 mm, glabrous;

body 4–6 mm wide;

wings 1–3 mm; thin;

vittae 1–4 in intervals, 2 on commissure.

elliptic, oblong, 6–8 mm, glabrous;

body 2–3 mm wide;

wings 0.5–1 mm; thin;

vittae 1–2 in intervals, 4 on commissure.

=22.