Dracocephalum parviflorum Nutt.
American dragonhead
Lamiaceae (Mint family)
Introduction to Vascular Plants
American dragonhead
Lamiaceae (Mint family)
Introduction to Vascular Plants
Map
Distribution of Dracocephalum parviflorum
Click here to view the full interactive map and legend
Species Information
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.
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.
Illustration 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)
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) |
877 | 450 | 1380 |
| Slope
Gradient (%) |
15 | 0 | 67 |
|
Aspect (degrees) |
107 | 30 | 162 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
3 | 1 | 7 |
| Modal
Nutrient Regime
Class |
C | ||
| #
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) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and 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.Status Information
Synonyms
Synonyms and Alternate Names:
Moldavica parviflora (Nutt.) Britton