milkweeds

(Asclepias spp.)

Overview

Asclepias is a genus of perennial flowering plants. There are more than 200 species worldwide, at least 76 species in North America north of Mexico, and 14 species in Minnesota. The common name “milkweed” refers to the white milky sap. The sap contains cardiac glycosides, and most species are poisonous. Milkweeds are the hosts for monarch butterfly larva. The genus is named after the Greek god of healing, Asclepius.

 
milkweed (Asclepias sp.)
Photo by Alfredo Colon
 
Description

Milkweeds have opposite or whorled leaves on short leaf stalks; milky latex; inflorescences of umbel-like, many-flowered cymes; and a complex flower structure consisting on an erect cup surrounding, in most species, a prolonged horn.

Distribution

Distribution Map

 

Sources

2, 3, 4, 5, 7, 24, 28, 29, 30.

6/25/2024    
Taxonomy

Kingdom

Plantae (green algae and land plants)

Subkingdom

Viridiplantae (green plants)

Infrakingdom

Streptophyta (land plants and green algae)

Superdivision

Embryophyta (land plants)

Division

Tracheophyta (vascular plants)

Subdivision

Spermatophytina (seed plants)

Class

Magnoliopsida (flowering plants)

Superorder

Asteranae

Order

Gentianales (gentians, dogbanes, madders, and allies)

Family

Apocynaceae (dogbane)

Subfamily

Asclepiadoideae (milkweeds)

Tribe

Asclepiadeae

Subtribe

Asclepiadinae

   

Subordinate Taxa

butterfly weed (Asclepias tuberosa ssp. interior)

clasping milkweed (Asclepias amplexicaulis)

common milkweed (Asclepias syriaca)

four-leaved milkweed (Asclepias quadrifolia) ?

green milkweed (Asclepias viridiflora)

narrow-leaved milkweed (Asclepias stenophylla)

oval-leaf milkweed (Asclepias ovalifolia)

poke milkweed (Asclepias exaltata)

prairie milkweed (Asclepias hirtella)

purple milkweed (Asclepias purpurascens)

showy milkweed (Asclepias speciosa)

Sullivant’s milkweed (Asclepias sullivantii)

swamp milkweed (Asclepias incarnata ssp. incarnata)

whorled milkweed (Asclepias verticillata)

woolly milkweed (Asclepias lanuginosa)

   

Synonyms

 

   

Common Names

milkweeds

 

 

 

 

 

 

 

Visitor Photos
 

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Luciearl

monarch    

Monarch caterpillar on milkweed.

   
     
monarch   monarch

Alfredo Colon

milkweed (Asclepias sp.)   milkweed (Asclepias sp.)

Robert Briggs

milkweed (Asclepias sp.)    
MinnesotaSeasons.com Photos
   

 

   

 

 

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Visitor Sightings
 

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Luciearl
6/24/2024

Location: Fairview Twp

monarch
Luciearl
7/6/2020

Location: Lake Shore, MN

Monarch caterpillar on milkweed.

monarch

Alfredo Colon
8/8/2019

Location: Woodbury, Minnesota

milkweed (Asclepias sp.)
Robert Briggs
10/19/2016

Location: Southern River Trail, Afton State Park.

milkweed (Asclepias sp.)
MinnesotaSeasons.com Sightings

 

 

 

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Created: 11/6/2019

Last Updated:

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