Pedicularis rainierensis
Pedicularis oederi
Mt. Rainier lousewort
Oeder's lousewort
basal 2–5, blade lanceolate, 40–80 x 3–20 mm, 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping distally, serrate to 2-serrate, surfaces glabrous;
cauline 2–6, blade lanceolate, 15–70 x 5–20 mm, 1- or 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping distally, serrate, surfaces glabrous.
basal 2–10, blade lanceolate, 10–70 x 3–15 mm, 1-pinnatifid, margins of adjacent lobes nonoverlapping or extensively overlapping distally, 2-serrate, surfaces glabrous or slightly tomentose;
cauline 1–5, blade lanceolate, 15–50 x 3–20 mm, 1-pinnatifid, margins of adjacent lobes nonoverlapping or extensively overlapping distally, 1- or 2-serrate, surfaces glabrous or slightly tomentose.
simple, 1–4, exceeding basal leaves, each 10–50-flowered;
bracts lanceolate or subulate to trullate, 10–15 x 1–2 mm, undivided or pinnatifid, proximal margins entire, distal serrate, surfaces glabrous or tomentose.
simple, 1 or 2, exceeding basal leaves, each 10–50-flowered;
bracts linear to lanceolate, 5–20 x 1–2 mm, undivided or 1-pinnatifid, proximal margins entire, distal serrate, surfaces glabrous or tomentose.
1–3.5 mm.
2–5 mm.
calyx 7.5–11 mm, hispid to tomentose, lobes 5, linear to narrowly triangular, 4–5 mm, apex entire, glabrous or ciliate;
corolla 16–19 mm, tube light or dark yellow, 8–10 mm;
galea light or dark yellow, 8–9 mm, beakless, margins entire medially and distally, apex arching beyond abaxial lip;
abaxial lip light or dark yellow, 4–5 mm.
calyx 8–11 mm, tomentose, lobes 5, triangular, 1–3 mm, apex entire or serrate, glabrous, sometimes ciliate;
corolla 15–24 mm, tube yellow, 9–15 mm;
galea bicolored, yellow proximally, brown or red distally, 6–9 mm, beakless, margins entire medially and distally, apex arching slightly over abaxial lip;
abaxial lip yellow, 4–5 mm.
= 16 (Asia).
Pedicularis rainierensis
Pedicularis oederi
Pedicularis rainierensis is known from Mt. Rainier and the Crystal Mountain area. The species is easily confused with P. bracteosa var. latifolia, which often occurs in the same meadows. While the sizes and shapes of their flowers are nearly indistinguishable, P. rainierensis is a much smaller plant with leaves only about three fourths the size, proximal leaf lobes less than one fifth the size, inflorescences about one half the length, and the number of flowers greatly reduced in comparison to those of P. bracteosa var. latifolia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Pedicularis oederi is known from the mountains of Europe, Asia, and western North America.
Two arctic species can be easily confused with Pedicularis oederi. Pedicularis flammea also has bicolored flowers that are yellow with galeas that are red- or purple-tipped, but the flowers of P. oederi are twice the size of those of P. flammea. The flowers of P. capitata are sometimes also yellow but may or may not be bicolored. If bicolored, the color is more diffuse and lighter than that of either P. flammea or P. oederi. The flowers of P. capitata are also larger than those of P. oederi. In addition, the inflorescences of P. capitata usually have no more than five flowers clustered at the tips, while those of P. oederi have at least 10 to 50 flowers along at least one third their lengths. H. J. Scoggan (1978–1979) listed P. oederi var. albertae based upon its densely woolly inflorescence.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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Flora NW
PNW Herbaria
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USDA Plants Database
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