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

Botrychium ascendens W.H. Wagner
upswept moonwort (trianglelobe moonwort)
Ophioglossaceae (Adder's-tongue family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #52893)

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Distribution of Botrychium ascendens
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Species Information

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Deciduous perennial, 5-13 cm tall.
2-pinnate, 1.5-2 times the length of trophophores.
Lanceolate, short stalked, the tips toothed; blades 1-pinnate; pinnae in 3 to 5 well-separated pairs, strongly ascending with minutely toothed margins, often shallowly incised.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to moist grassy fields and meadows in the lowland and montane zones; rare in SW and SE BC; N to AK, disjunct in ON, S to CO, ID, NV and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Botrychium ascendens

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) 1195 1703 2212
Slope Gradient (%) 0 6 12
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
12 11 12
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 6 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: ESSF(1), MS(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