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

Stachys arvensis (L.) L.
field hedge-nettle (staggerweed)
Lamiaceae (Mint family)

Introduction to Vascular Plants

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Distribution of Stachys arvensis
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Species Information

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Illustration Source: The Illustrated Flora of British Columbia

General:
Annual herb from a taproot; stems ascending to erect, 10-30 cm tall, branched, stiff-hairy, 4-angled.

Leaves:
Opposite, egg-shaped, 1.5-2.5 cm long, tips blunt, bases rounded to slightly notched, margins toothed; stalks 1-2.5 cm long.

Flowers:
Inflorescence of 2- to 6-flowered clusters in the axils of leaf-like bracts (becoming smaller and unstalked above) forming a lax, interrupted, terminal spike; corollas pale purple, 6-7 mm long, tube 3-6 mm long, with a ring of hairs within; calyces tubular-bell-shaped, hairy, tube 2.5-4 mm long, upper part purple, teeth triangular egg-shaped to lanceolate.

Fruits:
Nutlets, 4 clustered together, egg-shaped, rounded at tip.

Source: The Illustrated Flora of British Columbia

Key to the Species and Taxonomic Notes

KEY TO STACHYS

1. Plants annuals......................................................................S. arvensis

1. Plants perennials.

2. Plants densely covered with soft, white hairs...........................S. byzantina

2. Plants not white-hairy.

3. Leaves unstalked, at least those of upper half of stem.............. S. palustris

3. Leaves all stalked.

4. Plants 70-150 cm tall; corollas deep red-purple; tubes 15-23 mm long.......................S. chamissonis

4. Plants 30-80 cm tall; corollas pale pink to pink-purple, tubes 8-13 mm long....................S. mexicana

Source: Illustrated Flora of British Columbia

Habitat / Range

Waste places and cultivated areas in the lowland zone; rare in SW BC, known only from Vancouver and Victoria; introduced from Europe.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Stachys arvensis

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
Site Information	Minimum	Average	Maximum
Elevation (metres)	956	1125	1295
Slope Gradient (%)	0	11	23
Aspect (degrees) [0 - N; 90 - E; 180 - S; 270 - W]	50	49	50
Soil Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric]	3	4	5
Modal Nutrient Regime Class	C
Number of field plots species was recorded in:	2
Modal BEC Zone Class	IDF
All BEC Zones (# of stations/zone) species was recorded in:	ICH(1), IDF(1)
Source: Klinkenberg 2020

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.

Status Information

Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Exotic	SNA	Exotic	Not Listed

BC Ministry of Environment: BC Species and Ecosystems Explorer, the authoritative source for conservation information in British Columbia.

Taxonomic and Nomenclatural Links

Genetic information (NCBI Taxonomy Database)
International Plant Names Index
Taxonomic Information from the World Flora Online
Integrated Taxonomic Information System

Additional Range and Status Information Links

Burke Museum of Natural History (Washington State records)
CalFlora
Consortium of Pacific Northwest Herbaria records
Jepson Interchange
NatureServe Explorer
USDA

Additional Photo Sources

Images From CalPhoto
UT Austin's Native Plant Database
Google Image Search
Flickr Image Search

General References

Google Scholar Search
Family References
General Botanical References for BC

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2024-07-27 4:58:57 AM ]

Disclaimer: The information contained in the E-Flora atlas pages is derived from expert sources as cited in each section. This information is scientifically based. E-Flora also acts as a portal to other sites via deep links. As always, users should refer to the original sources for complete information. E-Flora BC is not responsible for the accuracy or completeness of the original information.