E-Flora BC: Electronic Atlas of the Flora of British Columbia

Pedicularis parviflora Sm. ex Rees
small-flowered lousewort (smallflower lousewort)
Orobanchaceae (Broom-rape family)
(Previously in Scrophulariaceae)

Introduction to Vascular Plants

© Aaron Baldwin  Email the photographer   (Photo ID #14251)

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Distribution of Pedicularis parviflora
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Pedicularis parviflora ssp. parviflora

Species Information

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Annual or biennial herb from a spindly taproot; stems single, ascending to erect, 10-40 cm tall, simple or more commonly branched, smooth except sometimes minutely hairy in the inflorescence.
Basal leaves small or lacking; stem leaves alternate, unstalked, lance-oblong, 1-5 cm long, pinnately cleft to lobed, the segments toothed or entire.
Inflorescences several-flowered, compact, somewhat head-like clusters at the ends of branches, often elongating and with a few lower, remote, axillary flowers, the bracts similar to the leaves but reduced upward; corollas purple or two-toned pinkish and purple, 11-17 mm long, 2-lipped, the upper lip 4-7 mm long, slightly arched, hood-like, beakless, with or more often without a pair of slender teeth near the tip, the lower lip 3-lobed, fringed with minute hairs; calyces 4-6 mm long, 2-lobed, the lobes jaggedly toothed; stamens 4, the filaments long-hairy.
Capsules, egg-shaped, abruptly pointy-tipped, smooth, 8-17 mm long, partly enveloped by dry expanded calyces; seeds several.
The relationship between this species, P. macrodonta, and the entity found on the Queen Charlotte Islands that has been named P. pennellii ssp. insularis, needs further clarification. It seems best to consider them synonymous with P. parviflora ssp. parviflora.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet meadows, fens and bogs in the montane and subalpine zones; rare in BC north of 52degreeN; circumboreal, N to AK, YT and NT; E to PQ; N Asia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Pedicularis parviflora

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 405 1164 2120
Slope Gradient (%) 0 5 60
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 349 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 5 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BAFA(1), BWBS(11), ESSF(10), ICH(1), MS(9), SBPS(1), SBS(18), SWB(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

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General References