Triodanis perfoliata (L.) Nieuwl.
Venus' Looking-glass (clasping Venus' looking-glass; Dwarf Trillium)
Campanulaceae (Bellflower family)

Introduction to Vascular Plants

Photograph

© Liz Watkinson     (Photo ID #21447)


Map

E-Flora BC Static Map

Distribution of Triodanis perfoliata
Click here to view the full interactive map and legend

SUBTAXA PRESENT IN BC

Triodanis perfoliata ssp. perfoliata

Species Information

General:
Annual herb from a taproot; stems simple or occaásionally few-branched, erect, 10-60 cm tall, spreading short-hairy to bristly-hairy.
Leaves:
Basal leaves lacking; stem leaves alternate, stalkless, heart-shaped or rounded, 0.5-3 cm long, clasping, palmately nerved, lowermost narrower with short stalks.
Flowers:
Inflorescence of false spikes borne in the axils of the middle and upper leaves; corollas deep purple to pale lavender, 8-13 mm long, 5-lobed, lobes longer than the tube.
Fruits:
Capsules, oblong or narrowly egg-shaped, opening above the middle.

SourceThe Illustrated Flora of British Columbia

Ecology

Ecological Framework for Triodanis perfoliata

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

Avg

Min

Max

Elevation (metres)
880 770 955
Slope Gradient (%)
53 50 58

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

185 160 212
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 3
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
4
Modal BEC Zone Class
ICH

All BEC Zones (# of stations/zone) species was recorded in

ICH(4)

Habitat and Range

Dry grasslands, rocky slopes, open forests and disturbed areas in the lowland and lower montane zones; infrequent in S BC; E to PQ and S to FL, TX, NM and CA.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Legousia perfoliata (L.) Britton
Specularia perfoliata (L.) A. DC.
Triodanis perfoliata var. perfoliata (L.) Nieuwl. [superfluous autonym]