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

Delphinium glaucum S. Watson
tall larkspur (Sierra larkspur)
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants

© Adolf Ceska  Email the photographer   (Photo ID #11612)

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Distribution of Delphinium glaucum
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Species Information

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General:
Perennial herb from a thick, tough rootstock; stems 1 or more, hollow, erect, (60) 100-200 cm tall, mostly smooth, with a bloom, bases green.
Leaves:
All stem leaves, alternate, 15 to 20 at time of flowering, stalks 1-14 cm long, blades round to 5-sided, 2-11 cm long, 3-18 cm wide, palmately divided into 5 (7) main broadly wedge-shaped segments, the segments shallowly 2- to 3-times lobed or toothed, the ultimate segments 5 to 9 (15) and 5-24 (35) mm wide, smooth.
Flowers:
Inflorescence a 10- to 90-flowered, narrow, terminal raceme, sometimes branched, the flowers bilaterally symmetric; bracts linear, green to bluish, 2-7 mm long, smooth or minutely-hairy; flower stalks ascending, 1-3 cm long, smooth to minutely-hairy; petals 4, the upper 2 united, pale within, blue-streaked outside, spurred, enclosed in upper sepal, nectary inside spur, the lower petals 2, pale to dark blue, mostly covering stamens, clawed, 4-6 mm long, 2-lobed, cleft 1-3 mm, the hairs white, centred near base of cleft; sepals 5, usually bluish purple to lavender, minutely-hairy, the lateral two pointing forward to spreading, 8-14 mm long, 3-6 mm wide, the lower two similar to lateral, the upper one spurred, the spur straight, 10-15 mm long; stamens 20 to many; pistils 3.
Fruits:
Follicles, 9-20 mm long, 3.5- to 4.5-times longer than wide, smooth to minutely-hairy; beaks straight, about 3 mm long; seeds pale to dark brown, winged, shining.
Notes:
Toxic; known to cause livestock poisoning.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Purple
Blooming Period:
Early Spring
Fruit/Seed characteristics:
Colour: Black
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Moist to mesic open forests, thickets, meadows and tundra from the montane to alpine zones; common throughout BC east of the Coast-Cascade Mountains, except southernmost BC; N to AK, YT and NT, E to MB and S to UT, CO, NV and CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Delphinium glaucum

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) 6 1124 2240
Slope Gradient (%) 0 16 262
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 174 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 4 8
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
824
Modal BEC Zone Class
BWBS
All BEC Zones (# of stations/zone) species was recorded in: AT(12), BAFA(20), BWBS(293), CWH(1), ESSF(139), ICH(5), IDF(8), MS(7), SBPS(1), SBS(113), SWB(143)

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 montane boreal & cool temperate.

Synonyms and Alternate Names

Delphinium brownii Rydb.
Delphinium scopulorum A. Gray
Delphinium scopulorum var. glaucum (S. Watson) A. Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References