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Langsdorf's lousewort, Langsdorff's lousewort

Mogollon Mountain lousewort

Habit Plants 4–30 cm. Plants 35–55 cm.
Leaves

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.

basal 0;

cauline 10–20, blade linear to narrowly lanceolate, 15–70 x 1–6 mm, undivided, margins serrate, surfaces glabrous.

Racemes

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.

paniculate or simple or buds present in cauline leaf axils, 3–15, each 2–12-flowered;

bracts linear to narrowly lanceolate, 2–70 x 1–6 mm, undivided, proximal margins entire, distal serrate, surfaces glabrous.

Pedicels

2.5–5 mm.

1.5–4.5 mm.

Flowers

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.

calyx 5.5–8.5 mm, glabrous, lobes 2, triangular, 0.5–1 mm, apex entire, glabrous;

corolla 12–20 mm, tube yellow, 4–10 mm;

galea yellow, 8–11 mm, beakless, margins entire medially, 1-toothed distally, apex arching over abaxial lip;

abaxial lip yellow, 6–8 mm.

Pedicularis langsdorffii

Pedicularis angustifolia

Phenology Flowering Jul–Aug.
Habitat Moist forested ridges and slopes.
Elevation 2000–3000 m. (6600–9800 ft.)
Distribution
from FNA
AK; AB; BC; NT; NU; YT; Asia
[WildflowerSearch map]
[BONAP county map]
from FNA
NM; Mexico (Chihuahua, Durango, Michoacán)
[BONAP county map]
Discussion

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.)

Plants of Pedicularis angustifolia have two-lobed calyces, undivided linear leaves, and branched or unbranched inflorescences. The beakless galea has a single tooth on each abaxial margin at the distal tip of the galea apex.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Bracts and calyces glabrous.
subsp. langsdorffii
1. Bracts and calyces +/- tomentose.
subsp. arctica
Source FNA vol. 17, p. 525. FNA vol. 17, p. 513.
Parent taxa Orobanchaceae > Pedicularis Orobanchaceae > Pedicularis
Sibling taxa
P. angustifolia, P. attollens, P. aurantiaca, P. bracteosa, P. canadensis, P. capitata, P. centranthera, P. chamissonis, P. contorta, P. crenulata, P. cystopteridifolia, P. densiflora, P. dudleyi, P. flammea, P. furbishiae, P. groenlandica, P. hirsuta, P. howellii, P. labradorica, P. lanata, P. lanceolata, P. lapponica, P. oederi, P. ornithorhyncha, P. ornithorhynchos, P. palustris, P. parryi, P. parviflora, P. pennellii, P. procera, P. pulchella, P. racemosa, P. rainierensis, P. semibarbata, P. sudetica, P. sylvatica, P. verticillata
P. attollens, P. aurantiaca, P. bracteosa, P. canadensis, P. capitata, P. centranthera, P. chamissonis, P. contorta, P. crenulata, P. cystopteridifolia, P. densiflora, P. dudleyi, P. flammea, P. furbishiae, P. groenlandica, P. hirsuta, P. howellii, P. labradorica, P. lanata, P. lanceolata, P. langsdorffii, P. lapponica, P. oederi, P. ornithorhyncha, P. ornithorhynchos, P. palustris, P. parryi, P. parviflora, P. pennellii, P. procera, P. pulchella, P. racemosa, P. rainierensis, P. semibarbata, P. sudetica, P. sylvatica, P. verticillata
Subordinate taxa
P. langsdorffii subsp. arctica, P. langsdorffii subsp. langsdorffii
Synonyms P. angustissima
Name authority Fischer ex Steven: Mém. Soc. Imp. Naturalistes Moscou 6: 49, plate 9, fig. 2. (1822) — (as langsdorfii) Bentham: Pl. Hartw., 22. (1839)
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