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whorled lousewort

Habit Plants 5–25 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.

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.

Pedicels

0.7–2.5 mm.

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.

2n

= 12.

Pedicularis verticillata

Phenology Flowering Jun–Sep.
Habitat Arctic meadows and thickets, muskegs, arctic and alpine tundras.
Elevation 0–1800 m. (0–5900 ft.)
Distribution
from FNA
AK; BC; NT; YT; Europe; Asia
[BONAP county map]
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.)

Source FNA vol. 17, p. 534.
Parent taxa 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. 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
Synonyms Pediculariopsis verticillata
Name authority Linnaeus: Sp. Pl. 2: 608. (1753)
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