Pedicularis centranthera
Pedicularis semibarbata
dwarf lousewort, Great Basin lousewort
pine woods lousewort, pinewoods pedicularis
basal 6–8, blade elliptic or spatulate, 35–120 x 10–30 mm, undivided or 1- or 2-pinnatifid, margins of adjacent lobes nonoverlapping or extensively overlapping distally, entire or 1- or 2-serrate, surfaces glabrous or scattered abaxial glands;
cauline 0–4, blade elliptic, sometimes lanceolate, 20–110 x 5–30 mm, 1- or 2-pinnatifid, margins of adjacent lobes overlapping distally, 1- or 2-serrate, surfaces glabrous.
basal 3–5, blade lanceolate or spatulate, 20–90 x 5–30 mm, undivided or 1- or 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping distally, entire or dentate, surfaces glabrous or tomentose;
cauline 1 or 2, blade lanceolate, 25–80 x 5–10 mm, 1- or 2-pinnatifid, margins of adjacent lobes nonoverlapping or slightly overlapping distally, serrate to dentate, surfaces glabrous or tomentose.
simple, 1–4, not exceeding basal leaves, each 8–14-flowered;
bracts spatulate, 40–60 x 3–6 mm, undivided proximally, undivided or 1-pinnatifid distally, proximal margins entire, distal 1- or 2-serrate, surfaces glabrous, sometimes arachnoid along main veins.
simple, 1–5, not exceeding basal leaves, each 4–20-flowered;
bracts lanceolate to oblanceolate, 30–90 x 5–40 mm, 1- or 2-pinnatifid nearly to midrib, margins serrate to dentate, surfaces glabrous.
1–5 mm.
2–4 mm.
calyx 17–22 mm, glabrous, lobes 5, narrowly triangular, 4–7 mm, apex entire or serrate, glabrous or ciliate;
corolla 28–40 mm, tube white or pale purple, 15–30 mm;
galea white or pale purple, apically sometimes dark violet to purple, 13–15 mm, beakless, margins entire medially and distally, apex arching over abaxial lip;
abaxial lip purple, 1–4 mm.
calyx 7–9 mm, glabrous or tomentose along veins, lobes 5, narrowly triangular, 1.5–5 mm, apex entire, glabrous or ciliate;
corolla 12–25 mm, tube light green or pale yellow, sometimes cream, 7–13 mm;
galea concolored, light green or pale yellow, sometimes cream, 5–12 mm, beakless, margins entire medially and distally, apex nearly straight to arching slightly over abaxial lip;
abaxial lip yellow, sometimes cream, 4–7 mm.
= 16.
Pedicularis centranthera
Pedicularis semibarbata
Varieties 2 (2 in the flora).
The leaves of Pedicularis centranthera exceed the inflorescence, giving the impression that the cauline leaves are basal. Proximalmost basal leaves are distinct: brown, membranous, and spatulate with undivided and entire margins. Pedicularis semibarbata has similar basal leaves.
Pedicularis centranthera occurs in evergreen forests, often under pinyon pine, juniper, ponderosa pine, and yellow pine.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Subspecies 2 (2 in the flora).
The basal and cauline leaves of Pedicularis semibarbata are distinctly one- or two-pinnatifid into deep pinnae and narrow subpinnae with serrate margins. The leaves and bracts far exceed the length of the inflorescence, often concealing it. Obvious spatulate, tan-colored, undivided, and membranous leaves are proximal to the divided basal leaves, but they are not as conspicuous as those of P. centranthera, a species with a similar growth form. Proximal floral bracts of P. semibarbata are similar to basal and cauline leaves, whereas in some specimens the distal bracts are spatulate and either once-divided or merely serrate at the apex. Surfaces of the corolla tube and sometimes the galea as well are hispid.
Pedicularis semibarbata grows under ponderosa pine, incense cedar, sugar pine, and white fir, primarily in the southern Cascade Range and Sierra Nevada, in the San Bernardino and San Gabriel mountains of California, and the Mount Charleston region of Nevada.
The flowers of Pedicularis semibarbata in Yosemite National Park were pollinated only by Osmia tristella (L. W. Macior 1977).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Bracts arachnoid and/or margins ciliate. | var. centranthera |
1. Bracts glabrous. | var. exulans |
1. Corollas 12–20(–22) mm; leaf lobes 6–20 x 3–14 mm; outside of Mount Charleston region, Nevada. | subsp. semibarbata |
1. Corollas 20–25 mm; leaf lobes 3–12 x 1–8 mm; within Mount Charleston region, Nevada. | subsp. charlestonensis |
CA
OR
Flora NW
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
