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

Pterospora andromedea Nutt.
pinedrops (woodland pinedrops)
Ericaceae (Crowberry family)
(Previously in Monotropaceae)

Introduction to Vascular Plants

© Allan Carson  Email the photographer   (Photo ID #47132)

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Distribution of Pterospora andromedea
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Species Information

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Perennial herb from a thick, ball-like, mass of roots; parasites on mycorrhizal fungi associated with trees; "stems" simple, erect, glandular-hairy and very sticky, 30-100 cm tall, reddish-brown; persistent after seed dispersal; lacking chlorophyll.
Scale-like, lanceolate to linear-lanceolate, thick, crowded and usually overlapping like shingles at the base of the stem.
Inflorescence a many-flowered terminal raceme, usually equal in length to the rest of the stem; flower stalks bent downward, 5-15 mm long, glandular-hairy; corollas urn-shaped, 5-8 mm long, glabrous, pale yellow, the lobes 5, short, curved back; calyces glandular-hairy, about half length of corolla, of 5 free sepals; stamens 10, the anthers awned.
Capsules, nearly globe-shaped, 8-12 mm broad.
Stem and leaves can be considered part of the inflorescence.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to mesic forests in the lowland and montane zones; infrequent in extreme S BC, infrequent northward along the coast and in C BC; N to AK, E to PQ and PE and S to CA, MX, MI, NY, and VT.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Pterospora andromedea

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) 200 850 1824
Slope Gradient (%) 0 25 90
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 194 354
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 6
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: CWH(13), ESSF(3), ICH(8), IDF(20), MS(13), PP(1), SBPS(1), SBS(10)


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