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

Dracocephalum parviflorum Nutt.
American dragonhead
Lamiaceae (Mint family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #29620)

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Distribution of Dracocephalum parviflorum
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Species Information

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General:
Annual or biennial herb from a taproot; stems erect, solitary or branched from base, 15-80 cm tall, minutely hairy with stiff hairs, 4-angled.
Leaves:
Opposite, lanceolate to narrowly egg-shaped, 2.5-8 cm long, 1-2.5 cm wide, coarsely toothed with the teeth often spine-tipped, minutely short-hairy beneath, stalked; lower leaves smaller, broader, and soon deciduous.
Flowers:
Inflorescence of crowded, dense spikes, 1.5-3.5 cm broad, often interrupted below, the terminal segment 2-10 cm long; bracts leaf-like, mostly 1-3 cm long, unstalked or nearly so, toothed, the teeth with spines; flowers short-stalked, numerous at each whorl; corollas tubular, blue or purplish to pinkish, slightly exceeding the calyces, with 2 short lips, the lower lip 3-lobed; calyces 8-14 mm long, long soft-hairy, the tube about equaling the 5 spine-tipped teeth, the upper tooth egg-shaped and longer than others.
Fruits:
Nutlets, 4 clustered together, egg-shaped, smooth.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic waste places, roadsides, rocky slopes, cutbanks and streambanks in the lowland and montane zones; infrequent throughout BC; N to AK, YT and NT, E to PQ and S to NY, MO, NE, NM, AZ and OR.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Dracocephalum parviflorum

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) 450 877 1380
Slope Gradient (%) 0 15 67
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
30 107 162
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 7
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
12
Modal BEC Zone Class
ICH
All BEC Zones (# of stations/zone) species was recorded in: BWBS(2), ICH(4), IDF(3), SBS(2)

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

Moldavica parviflora (Nutt.) Britton

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References