Pedicularis verticillata |
Pedicularis langsdorffii |
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whorled lousewort |
Langsdorf's lousewort, Langsdorff's lousewort |
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Habit | Plants 5–25 cm. | Plants 4–30 cm. | ||||
Leaves | basal 5–25, blade elliptic, 10–20 x 3–8 mm, 1- or 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping distally, serrate, surfaces glabrous or tomentose; cauline whorled, whorls 1 or 2, leaves per whorl 3–5, blade lanceolate, 5–30 x 3–10 mm, 1- or 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping, serrate, surfaces glabrous. |
basal 0–10, blade elliptic, 10–30 x 3–15 mm, 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping distally, serrate, surfaces glabrous; cauline 1–4, blade elliptic, 10–40 x 2–10 mm, 1- or 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping distally, serrate, sometimes crenate, surfaces glabrous, sometimes sparsely tomentose. |
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Racemes | verticillate, 1–10, exceeding basal leaves, each 10–40-flowered; bracts lanceolate to trullate, 4–20 x 2–5 mm, undivided or 1- or 2-pinnatifid, margins serrate, surfaces glabrous or sparsely tomentose. |
simple, 1–6, exceeding basal leaves, each 10–50-flowered; bracts subulate or linear, 5–25 x 1–10 mm, undivided or 1-pinnatifid, proximal margins entire, distal serrate, surfaces glabrous or sparsely tomentose to tomentose. |
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Pedicels | 0.7–2.5 mm. |
2.5–5 mm. |
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Flowers | calyx 3.5–10 mm, glabrous or pilose, lobes 5, deltate, 0.3–1 mm, apex entire, glabrous or ciliate; corolla 10–18 mm, tube light or dark pink, 5–8 mm; galea light or dark pink or purple, 5–7 mm, beakless, margins entire medially and distally, apex arching slightly over abaxial lip; abaxial lip light pink with purple veins and/or purple spots or purple with dark veins, 5–7 mm. |
calyx 6–11 mm, glabrous or +/- tomentose, lobes 5, triangular, 2–5 mm, apex entire or serrate to dentate, glabrous; corolla 17–25 mm, tube pink or lavender, 11–13 mm; galea pink or lavender, 6–12 mm, beakless, margins entire medially, 1-toothed distally, apex strongly arching over abaxial lip; abaxial lip pink or lavender, 5–8 mm. |
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2n | = 12. |
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Pedicularis verticillata |
Pedicularis langsdorffii |
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Phenology | Flowering Jun–Sep. | |||||
Habitat | Arctic meadows and thickets, muskegs, arctic and alpine tundras. | |||||
Elevation | 0–1800 m. (0–5900 ft.) | |||||
Distribution |
AK; BC; NT; YT; Europe; Asia |
AK; AB; BC; NT; NU; YT; Asia
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Discussion | In the flora area, Pedicularis verticillata and P. chamissonis are the only species of Pedicularis with whorled leaves. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). Pedicularis langsdorffii may be mistaken for P. hirsuta, P. lanata, and P. sudetica, which have similar growth forms and habitat requirements. Pedicularis langsdorffii generally has larger, pink to lavender corollas with toothed galeas that strongly arch over the abaxial lips in contrast to the smaller, toothless, pink corollas and slightly arching galeas of P. lanata. Pedicularis sudetica has up to five cauline leaves or lacks them. The straight, smaller galeas and pale pink or white corollas of P. hirsuta differentiate it from P. langsdorffii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 17, p. 534. | FNA vol. 17, p. 525. | ||||
Parent taxa | Orobanchaceae > Pedicularis | Orobanchaceae > Pedicularis | ||||
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Subordinate taxa | ||||||
Synonyms | Pediculariopsis verticillata | |||||
Name authority | Linnaeus: Sp. Pl. 2: 608. (1753) | Fischer ex Steven: Mém. Soc. Imp. Naturalistes Moscou 6: 49, plate 9, fig. 2. (1822) — (as langsdorfii) | ||||
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