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Astragalus canadensis L.
CANADIAN MILKVETCH
Life   Plantae   Dicotyledoneae   Fabaceae   Astragalus

Astragalus canadensis, leaf and flower
© Kay Yatskievych, 2003 · 1
Astragalus canadensis, leaf and flower

Click on map for details about points.

Links

Associates · map
FamilyScientific name @ source (records)
Apidae  Eucera frater @ BBSL (3)
Erysiphaceae  Erysiphe communis @ BPI (8)

Erysiphe polygoni @ BPI (18)
Megachilidae  Hoplitis hypocrita @ BBSL (5)

Osmia atrocyanea @ BBSL (1)
Mycosphaerellaceae  Didymaria astragali @ BPI (2)

Mycosphaerella pachyasca @ BPI (1)

Mycosphaerella tassiana @ 609764B (1); 609764A (1)

Ramularia astragali @ BPI (5)

Septoria wisconsina @ BPI (1)
Peronosporaceae  Peronospora trifoliorum @ BPI (6)

Peronospora viciae @ BPI (1)
Pucciniaceae  Uromyces punctatus @ BPI (3)

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Following modified from MissouriPlants.com
   Top | See original


Astragalus canadensis L.

Rattleweed, Canadian Milkvetch

Astragalus canadensis plant

Family - Fabaceae

Habit - Perennial forb with woody rhizomes, often colonial.

Stems - Multiple from base, loosely ascending to erect, often branched, reddish in strong sun, fistulose, pubescent with appressed, oppositely branched hairs, these centrally attached with branches running parallel to stem.

Astragalus canadensis stem

Leaves - Alternate, odd pinnate, with 15-31 leaflets, the petiole 10-30 mm long, the rachis 14-24 cm long. Stipules 4-18 mm long, pubescent, fused to the petiole toward the base and sheathing the stem, lanceolate, sharply pointed, membranous when young, papery at maturity. Leaflets opposite, 10-50 mm long, 5-15 mm wide, reduced in size toward tip of leaf, lanceolate to oblong, elliptic, or ovate, rounded or bluntly pointed at the tip, mucronate, the upper surface glabrous to sparsely hairy, the undersurface sparsely to densely branched-hairy. Petiolules to 1.5 mm.

Astragalus canadensis leaf1 Leaf adaxial.

Astragalus canadensis leaflets Leaflets.

Inflorescence - Axillary, elongate, spikelike racemes, 12-30 cm long, the stalk 4-14 cm long, with 30-70 flowers, the bracts 3-5 mm long, hairy. Inflorescence rachis ridged, pubescent. Pedicels 1.1 mm long, hairy, each subtended by a linear-attenuate bract to 6 mm long.

Astragalus canadensis inflorescence2 Inflorescences.

Flowers - Slightly drooping. Cleistogamous flowers absent. Calyces with the tube 4-7 mm long, less than half the length of the corollas, broadly cylindric, somewhat pouched, sparsely hairy, whitish-green, 5-lobed, the lobes 1-4 mm long, linear. Corollas papilionaceous, to 2 cm, greenish yellow to cream-colored or white, sometimes tinged with purple or spotted with red, the banner 11-16 mm long, 5-6 mm wide, usually bent or curved upward, the wings 10-14 mm long, the keel 9-13 mm long. Stamens diadelphous, the fused portion 7-8 mm long, the free portion 2-4 mm long. Anthers yellow. Styles 7-8 mm long, white, glabrous, upcurved.

Astragalus canadensis flowers Flowers.

Astragalus canadensis calyx Calyx.

Fruits - Inflated legumes, 12-18 mm long, 5-7 mm wide, ovoid to oblong-ovoid, not curved, beaked with persistent style, ascending to spreading, 2-locular, usually glabrous, yellowish brown, tardily dehiscent by 2 apical valves. Seeds 1.5-2.0 mm long, the surface olive or reddish brown, smooth or nearly so. Seeds about 10.

Astragalus canadensis fruits Fruits.

Astragalus canadensis fruits2 Mature fruits.

Flowering - May - August.

Habitat - Thickets, wet lowlands, pastures, prairies, upland woods, waste ground.

Origin - Native to U.S.

Other info. - This species can be found in scattered locations throughout most of Missouri, and across all but the far western states of the continental U.S. The plant is easy to identify while in flower but vegetatively it can be mistaken for many other plants. It is Missouri's most common member of the Astragalus genus, a genus which is one of the largest in the plant kingdom. In western regions of the U.S., the number of Astragalus species becomes much larger, and there they can be difficult to tell apart. The species has been subdivided into numerous infraspecific taxa. Missouri plants are assignable to var. canadensis .

This species grows about as wide as tall and would make an excellent specimen garden plant. The common name "rattlebox" derives from the sound of seeds rattling around loosely within the pods at maturity. A. canadensis is palatable to livestock and deer but may cause locoism. This syndrome, brought about by consumption of large amounts of certain plants within the genus, is associated with bizarre behavioral changes. Affected animals appear dazed, uncoordinated, frantic, or violent, and are referred to as loco. The condition is irreversible, incurable, and may be fatal. The toxicity is caused by alkaloids of the indolizidine class, such as swainsonine. Other toxins sometimes present in Astragalus include selenium, which is accumulated from the soil, and 3-nitropropionic acid.

Photographs taken at the Kansas City Zoo, 7-10-00, and in the Ozark Scenic Riverways, Shannon County, MO., 7-6-03 (DETenaglia); also at Shaw Nature Reserve, Franklin County, MO, 7-11-2011, and Marais Temps Clair Conservation Area, St. Charles County, MO, 7-19-2010 and 7-22-2013 (SRTurner).


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You are here: Home / Plant Profile

Astragalus canadensis L.
Canadian milkvetch

Image of Astragalus canadensis

General Information
Symbol: ASCA11
Group: Dicot
Family: Fabaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   N
L48   N
Characteristics
Fact Sheet (pdf) (doc) Plant Guide (pdf) (doc)
Data Source and Documentation
About our new maps
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Astragalus thumbnails at the Plants Gallery

Joe F. Duft. USDA NRCS. 1992. Western wetland flora: Field office guide to plant species . West Region, Sacramento. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

©Thomas G. Barnes. Barnes, T.G., and S.W. Francis. 2004. Wildflowers and ferns of Kentucky . University Press of Kentucky. Usage Requirements .

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory . United States, CO. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team . Usage Requirements .

slideshow

Synonyms

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Rosidae
Order Fabales
Family Fabaceae ⁄ Leguminosae – Pea family
Genus Astragalus L. – milkvetch
Species Astragalus canadensis L. – Canadian milkvetch

Subordinate Taxa

The Plants Database includes the following 3 subspecies of Astragalus canadensis . Click below on a thumbnail map or name for subspecies profiles. Plant is native (blue) Native Plant is introduced Introduced Plant is introduced Native and Introduced Related taxa legend Distribution of <i>
Astragalus canadensis</i>
L. var. <i>
brevidens</i>
(Gandog.) Barneby
Astragalus canadensis var. brevidens
shorttooth Canadian milkvetch Distribution of <i>
Astragalus canadensis</i>
L. var. <i>
canadensis </i>
Astragalus canadensis var. canadensis
Canadian milkvetch Distribution of <i>
Astragalus canadensis</i>
L. var. <i>
mortonii</i>
(Nutt.) S. Watson
Astragalus canadensis var. mortonii
Morton's Canadian milkvetch

Legal Status

Threatened and Endangered Information:
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
Maryland Canada milkvetch Endangered
Michigan Canadian milk-vetch Threatened
Vermont Canadian milk-vetch Threatened

Wetland Status

Interpreting Wetland Status

North America
Arid West FAC
Atlantic and Gulf Coastal Plain FAC
Eastern Mountains and Piedmont FAC
Great Plains FAC
Midwest FAC
Northcentral & Northeast FAC
Western Mountains, Valleys, and Coast FACW

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (ASCA11)
CalPhotos (ASCA11)
Integrated Taxonomic Information System (ASCA11)
Jepson Interchange (University of California - Berkeley) (ASCA11)
Lady Bird Johnson Wildflower Center Native Plant Information Network (ASCA11)
Native American Ethnobotany (University of Michigan - Dearborn) (ASCA11)
Native Plants Network (ASCA11)
University of Tennessee Herbarium (Distribution) (ASCA11)
Related Websites
Canada-Canadian Biodiversity Information Facility (ASCA11)
Eastern Wildflowers (ASCA11)
IL-Illinois State Museum (ASCA11)
IL-Prairie Restoration (Eastern Illinois University) (ASCA11)
IL-Prairie Wildflowers of Illinois (ASCA11)
ILDIS-Species Abstract (ASCA11)
MN-University of Minnesota Herbarium Image (ASCA11)
MO-Missouri Plants (ASCA11)
NC-Plant Fact Sheets (NCSU) (ASCA11)
UK-Plants For A Future (ASCA11)
USDA NRCS Plant Materials (ASCA11)
USDI GS-Wildflowers of North Dakota Grasslands (ASCA11)
WA-Marion Ownbey Hebarium Image (WSU) (ASCA11)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Astragalus+canadensis+var.+brevidens&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Astragalus+canadensis+var.+brevidens&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

CalPhotos    
Contributors       Log In  
 

Number of matches : 27
Query: SELECT * FROM img WHERE ready=1 and taxon like "Astragalus canadensis var. brevidens%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1964 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1965 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1967 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1971 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1972 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1973 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1974 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1975 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0867 [detail]
© 2012 Gary A. Monroe

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0868 [detail]
© 2012 Gary A. Monroe

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0869 [detail]
© 2012 Gary A. Monroe

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0870 [detail]
© 2012 Gary A. Monroe

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
(shown with Populus balsamifera )
ID: 0000 0000 1212 2017 [detail]
© 2012 Jean Pawek

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
(shown with Populus balsamifera )
ID: 0000 0000 1212 2018 [detail]
© 2012 Jean Pawek

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1212 2019 [detail]
© 2012 Jean Pawek

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1016 0766 [detail]
© 2016 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1016 0767 [detail]
© 2016 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1016 0768 [detail]
© 2016 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1018 0179 [detail]
© 2018 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1018 0181 [detail]
© 2018 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1018 0184 [detail]
© 2018 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1018 0185 [detail]
© 2018 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1018 0186 [detail]
© 2018 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 1018 0187 [detail]
© 2018 John Doyen

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


Copyright © 1995-2019 UC Regents. All rights reserved.

CalPhotos is a project of BNHM      University of California, Berkeley

Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Astragalus+canadensis&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Astragalus+canadensis&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

CalPhotos    
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Number of matches : 39
Query: SELECT * FROM img WHERE ready=1 and taxon like "Astragalus canadensis%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0604 0503 [detail]
© 2004 Jeff Abbas

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0604 0504 [detail]
© 2004 Jeff Abbas

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0604 0505 [detail]
© 2004 Jeff Abbas

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0805 0226 [detail]
© 2005 Steve Matson

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0805 0227 [detail]
© 2005 Steve Matson

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0805 0228 [detail]
© 2005 Steve Matson

Astragalus canadensis
Astragalus canadensis
ID: 0000 0000 0808 1798 [detail]
© 2008 Steve Matson

Astragalus canadensis
Astragalus canadensis
ID: 0000 0000 0808 1799 [detail]
© 2008 Steve Matson

Astragalus canadensis
Astragalus canadensis
ID: 0000 0000 0410 1470 [detail]
© 2010 Louis-M. Landry

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0114 2316 [detail]
© 2014 John Doyen

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0114 2317 [detail]
© 2014 John Doyen

Astragalus canadensis
Astragalus canadensis
Canada Milkvetch
ID: 0000 0000 0114 2318 [detail]
© 2014 John Doyen

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1964 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1965 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1967 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1971 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1972 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1973 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1974 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
ID: 0000 0000 0112 1975 [detail]
© 2012 Steve Matson

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0867 [detail]
© 2012 Gary A. Monroe

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0868 [detail]
© 2012 Gary A. Monroe

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0869 [detail]
© 2012 Gary A. Monroe

Astragalus canadensis var. brevidens
Astragalus canadensis var. brevidens
Shorttooth Canadian Milkvetch
ID: 0000 0000 0412 0870 [detail]
© 2012 Gary A. Monroe

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


Copyright © 1995-2019 UC Regents. All rights reserved.

CalPhotos is a project of BNHM      University of California, Berkeley

Updated: 2019-10-17 10:11:51 gmt
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