Botrychium pinnatum H. St. John
northwestern moonwort (northern moonwort)
Ophioglossaceae (Adder's-tongue family)

Introduction to Vascular Plants

Photograph

© Ryan Batten     (Photo ID #23782)


Map

E-Flora BC Static Map

Distribution of Botrychium pinnatum
Click here to view the full interactive map and legend

Species Information

General:
Deciduous perennial, 3-15 cm tall.
Notes:
The only North American collections of Botrychium boreale Milde have been recently collected in Kootenay National Park, SE BC (W.H. Wagner, pers. comm.). It is difficult to separate from B. pinnatum, but the lowermost pinnae have shallow, narrow sinuses (they are wide and deep in B. pinnatum).

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Ecology

Ecological Framework for Botrychium pinnatum

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)
702 15 2075
Slope Gradient (%)
37 0 90

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

80 50 359
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 0 7
Modal Nutrient Regime
Class
A
# of field plots
 species was recorded in:
27
Modal BEC Zone Class
CWH

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

AT(2), BAFA(1), BWBS(1), CMA(1), CWH(12), ESSF(4), ICH(2), MH(3)

Habitat and Range

Mesic to moist stream banks, meadows and heath in the montane and subalpine zones; infrequent throughout BC; N to AK, YT and NT and S to CO, AZ and CA.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Botrychium boreale subsp. obtusilobum (Rupr.) R.T. Clausen
Botrychium boreale var. obtusilobum (Rupr.) Broun