Pedicularis oederi

Vahl ex Hornemann

Fors. Oecon. Plantel. ed. 2, 580. 1806.

Common names: Oeder’s lousewort
Synonyms: Pedicularis oederi var. albertae (Hultén) B. Boivin
Treatment appears in FNA Volume 17. Treatment on page 526. Mentioned on page 513, 518, 522.

Plants 2–15 cm. Leaves: 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-serrate or 2-serrate, surfaces glabrous or slightly tomentose. Racemes 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. Pedicels 2–5 mm. Flowers: 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. 2n = 16 (Asia).


Phenology: Flowering Jun–Aug.
Habitat: Arctic and alpine tundras.
Elevation: 500–3700 m.

Distribution

Alta., B.C., N.W.T., Yukon, Alaska, Mont., Wyo., Eurasia

Discussion

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.

Selected References

None.

Lower Taxa

None.

... more about "Pedicularis oederi"
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
beakless +  and beaked +
serrate +  and entire +
Bruce W. Robart +
Vahl ex Hornemann +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1-pinnatifid;lanceolate;1-pinnatifid;lanceolate +
not leathery +  and not fleshy +
3mm;20mm +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1-pinnatifid +, undivided +, linear +  and lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
tubular +, campanulate +  and symmetric +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
fleshy +  and woody +
whorled +  and alternate +
Oeder’s lousewort +
white +, yellow +, red +, purple +  and pink +
1.5 cm15 mm <br />0.015 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Mont. +, Wyo. +  and Eurasia +
500–3700 m. +
hairy +  and glabrous +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
red +, brown +, , +, yellow +  and bicolored +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Arctic and alpine tundras. +
axillary +  and terminal +
spiral +, whorled +, alternate +  and opposite +
deciduous +
basal +  and cauline +
triangular +
entire +, 2-serrate +  and 1-serrate +
overlapping +  and nonoverlapping +
crenate +  and serrate +
tenuinucellate +  and unitegmic +
campylotropous-like +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Jun–Aug. +
Fors. Oecon. Plantel. ed. +
10-50-flowered;simple +
5 +  and 100 +
5 +  and 2 +
subequal +
aerial +  and subterranean +
Woolly (?) +, Villous (?) +, Hispid (?) +  and Glabrous (?) +
tomentose;glabrous;tomentose;glabrous;tomentose;glabrous +
Pedicularis oederi var. albertae +
Pedicularis oederi +
Pedicularis +
species +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +