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

Microsteris gracilis var. humilior (Hook.) Greene (Hook.) Cronquist
pink twink
Polemoniaceae (Phlox family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #1985)

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Distribution of Microsteris gracilis var. humilior
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Species Information

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General:
Annual herb from a taproot; stems erect, sometimes decumbent, simple or branched, minutely hairy or glandular-hairy at least above, 5-30 cm tall.
Leaves:
Upper leaves alternate, entire, linear to lance-elliptic; lower leaves opposite, more egg-shaped; 1-5 cm long, unstalked, at least the upper leaves hairy to glandular.
Flowers:
Inflorescence of pairs of flowers (one stalked the other not) at the ends of the stem and branches, or single in the axils of leaf-like bracts; corollas pinkish-white, 5-15 mm long, the tube white or yellowish, spreading to five pink to pale purple, squared-off or notched, 1-2 mm long lobes; calyces 5-10 mm long, glandular-hairy, with 5 green ribs separated by membranous tissue that is ruptured by the ripening capsule, the slender teeth about as long as the tube.
Fruits:
Capsules, spheric to egg-shaped, 3-chambered; seeds 1 per chamber.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to dry grasslands, meadows, rocky slopes, floodplain terraces, streamsides, gravelly roadsides and forest openings in the lowland, steppe and lower montane zones; common in S BC, infrequent northward; ssp. gracilis - mostly west of the Coast-Cascade Mountains, N to Vancouver Island, introduced in SE AK, S to CA, OR and MT; ssp. humilis - mostly east of Coast-Cascade Mountains, N to S YT (where probably introduced), S to MT, NM, CA and MX, S America.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Microsteris gracilis var. humilior

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

Minimum

Average

Maximum

Elevation (metres) 1371 1371 1371
Slope Gradient (%) 30 30 30
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
130 130 130
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 2
Modal Nutrient Regime
Class
B
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
MS
All BEC Zones (# of stations/zone) species was recorded in: MS(1)

Climate

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.

Synonyms and Alternate Names

Gilia gracilis var. humilior (Hook.) H. St. John
Microsteris gracilis subsp. humilis (Greene) Brand
Microsteris humilis Greene
Microsteris micrantha (Kellogg) Greene
Phlox gracilis subsp. humilis (Greene) H. Mason
Phlox gracilis var. humilior (Hook.) B. Boivin

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References