Asclepias verticillata L.
WHORLED MILKWEED
Life   Plantae   Dicotyledoneae   Asclepiadaceae   Asclepias

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Asclepias verticillata
© Copyright Bobby Hattaway 2011 · 5
Asclepias verticillata

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Asclepias verticillata
© Copyright Bobby Hattaway 2011 · 5
Asclepias verticillata
Asclepias verticillata
© Copyright Bobby Hattaway 2011 · 5
Asclepias verticillata

Asclepias verticillata
© Copyright Bobby Hattaway 2011 · 5
Asclepias verticillata
Asclepias verticillata
© Copyright Bobby Hattaway 2011 · 5
Asclepias verticillata

Asclepias verticillata
© Copyright Bobby Hattaway 2011 · 5
Asclepias verticillata
Asclepias verticillata
© Copyright Bobby Hattaway 2011 · 5
Asclepias verticillata

Asclepias verticillata, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Asclepias verticillata, whole plant - in flower - general view
Asclepias verticillata, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Asclepias verticillata, inflorescence - whole - unspecified

Asclepias verticillata, inflorescence - lateral view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Asclepias verticillata, inflorescence - lateral view of flower
Asclepias verticillata, leaf - on upper stem
© Copyright Steve Baskauf, 2002-2011 · 4
Asclepias verticillata, leaf - on upper stem

Asclepias verticillata, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Asclepias verticillata, stem - showing leaf bases
Asclepias verticillata, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Asclepias verticillata, stem - showing leaf bases

Asclepias verticillata, fruit - lateral or general close-up
© Copyright Steve Baskauf, 2002-2011 · 4
Asclepias verticillata, fruit - lateral or general close-up
Asclepias verticillata
© Copyright Jennifer Larson 2012 · 2
Asclepias verticillata

Associates · map
FamilyScientific name @ source (records)
Aphididae  Aphis ( @ CSUC_TCN (3)
Colletidae  Hylaeus affinis @ AMNH_BEE (1)

Hylaeus leptocephalus @ AMNH_BEE (1)
Diaporthaceae  Phomopsis missouriensis @ BPI (1)
Mycosphaerellaceae  Cercospora incarnata @ BPI (1)

Rhabdospora demetrioniana @ BPI (1)
Pucciniaceae  Puccinia bartholomaei @ BPI (4)

Puccinia chloridis @ BPI (3)
Uropyxidaceae  Aecidium howei @ BPI (1)

Aecidium @ BPI (1)
_  Leptothyrium pazschkeanum @ BPI (1)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Asclepias verticillata L. Whorled Milkweed
Apocynaceae — Dogbane family
Historical native
Asclepias verticillata Asclepias verticillata
Nottingham County Park (PA)
September 2006 Asclepias verticillata
Unionville Barrens (PA)
September 2013

Search Google Delaware USDA

Photos copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
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Asclepias verticillata  L.

Whorled Milkweed

Asclepias verticillata plant2

Family - Asclepiadaceae

Habit - Perennial forb from a fibrous rootstock and rhizomes.

Stems - Ascending to erect, to 60 cm, occasionally few-branched toward the tip and with axillary branchlets with pairs or clusters of leaves absent, short-hairy in longitudinal lines, with white sap, with numerous nodes and short internodes.

Asclepias verticillata stem2 Stem and leaves.

Leaves - Mostly in whorls of 3-6, sessile or short petiolate. Leaf blades 2-8 cm long, 0.5-2.5 mm wide, linear, the base narrowed or tapered, the tip sharp pointed, the margins revolute, glabrous or sparsely and minutely hairy, with single prominent midrib.

Asclepias verticillata leaves Leaves.

Inflorescence - Axillary pedunculate umbels, 2-10 per stem. Peduncles to 3 cm long, pubescent. Flowers typically 6-20 per umbel. Pedicels purplish at base, 8-9 mm long, pubescent. Bracts usually present at the base of the umbels, these linear and short.

Asclepias verticillata inflorescence2 Buds and inflorescences.

Asclepias verticillata inflorescence Inflorescences.

Flowers - Calyx lobes 5, reflexed, glabrous or sparsely short-hairy, 1.5-2.5 mm long, narrowly lanceolate to ovate. Corolla lobes 5, reflexed, glabrous, white to pale green (usually with age), often pale purplish at apex, 3.5-5.0 mm long, elliptic. Gynostegium appearing stalked (the column visible below the bases of the hoods), pale green to white, the corona slightly shorter than to about as long as the tip of the anther/stigma head. Corona hoods white, 1.5-2.0 mm long, erect, attached toward their bases, broadly oblong in outline, the tips broadly rounded, the margins not toothed, the bases not pouched. Horns white, attached near the hood bases, extended conspicuously beyond the tips of the hoods and incurved over the anther/stigma head, linear, not flattened, tapered to a sharp point at the tip. Anther column greenish, white at apex, 2 mm long. Pollinia 1.2 mm long, translator deep purplish-brown. Pistils 2, glabrous, greenish, 2 mm long.

Asclepias verticillata flowers3 Flowers.

Asclepias verticillata flowers2

Fruits - Follicles 7-10 cm long, erect or ascending from erect to deflexed stalks, narrowly elliptic-lanceolate in outline, the surface smooth, glabrous or minutely hairy. Seeds with the body 5-6 mm long, the margins narrowly to somewhat more broadly winged, the terminal tuft of hairs white.

Flowering - May - September.

Habitat - Prairies, glades, bluffs, pastures, open woods, roadsides, railroads.

Origin - Native to U.S.

Other info. - This attractive little species can be found throughout most of Missouri, and throughout most of the continental U.S. except for a few far western states. It is often seen, sometimes in large populations, in freeway medians. Like most of the species in this family the plant has a white sap which is irritating and toxic. This is an easily recognized members of the genus due to its very narrrow, whorled leaves. At a glance it could be mistaken for the much less common A. stenophylla , but that species has far fewer leaf nodes, which are not whorled and are usually alternate. Because it handles dry conditions very well, A. verticillata would make a fine garden specimen. Many flying insects are attracted to its flowers.

Photographs taken at the "Narrows", Oregon County, MO., 6-28-03 (DETenaglia); also at Holly Ridge Conservation Area, Stoddard County, MO, 5-20-2014, and Onondaga Cave State Park, Crawford County, MO, 6-18-2014 and 6-24-2014 (SRTurner).


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https://plants.usda.gov/java/profile?symbol=ASVE ---> http://plants.usda.gov/core/profile?symbol=ASVE
http://plants.usda.gov/core/profile?symbol=ASVE ---> https://plants.usda.gov/core/profile?symbol=ASVE
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You are here: Home / Plant Profile

Asclepias verticillata L.
whorled milkweed

Image of Asclepias verticillata

General Information
Symbol: ASVE
Group: Dicot
Family: Asclepiadaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   N
L48   N
Data Source and Documentation
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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 Asclepias thumbnails at the Plants Gallery

©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, MD, Great Falls. Usage Requirements .

©Elaine Haug. Provided by Smithsonian Institution, Department of Botany . United States, VA. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 32. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . 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 Asteridae
Order Gentianales
Family Asclepiadaceae – Milkweed family
Genus Asclepias L. – milkweed
Species Asclepias verticillata L. – whorled milkweed

Subordinate Taxa

This plant has no children

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.
Massachusetts linear-leaved milkweed Threatened
Rhode Island whorled milkweed Special Concern
U.S. Weed Information
Asclepias verticillata eastern whorled milkweed whorled milkweed This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
NE&GP Stubbendieck, J., G.Y. Friisoe,and M.R. Bolick. 1994. Weeds of Nebraska and the Great Plains . Nebraska Department of Agriculture, Bureau of Plant Industry. Lincoln, Nebraska.
SWSS Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM . Southern Weed Science Society. Champaign, Illinois.

Wetland Status

Interpreting Wetland Status

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

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (ASVE)
CalPhotos (ASVE)
Integrated Taxonomic Information System (ASVE)
Lady Bird Johnson Wildflower Center Native Plant Information Network (ASVE)
Native American Ethnobotany (University of Michigan - Dearborn) (ASVE)
USF Atlas of Florida Vascular Plants (ASVE)
University of Tennessee Herbarium (Distribution) (ASVE)
University of Wisconsin - Stevens Point Freckmann Herbarium (ASVE)

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

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Number of matches : 22
Query: SELECT * FROM img WHERE ready=1 and taxon like "Asclepias verticillata%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Asclepias verticillata
Asclepias verticillata
Whorled Milkweed
ID: 0000 0000 0203 0624 [detail]
© 2003 Jeff Abbas

Asclepias verticillata
Asclepias verticillata
Whorled Milkweed
ID: 0000 0000 0203 0626 [detail]
© 2003 Jeff Abbas

Asclepias verticillata
Asclepias verticillata
Whorled Milkweed
ID: 0000 0000 0203 0625 [detail]
© 2003 Jeff Abbas

Asclepias verticillata
Asclepias verticillata
Whorled Milkweed
(shown with Pompilid wasp )
ID: 0000 0000 0805 1295 [detail]
© 2005 Robert Sivinski

Asclepias verticillata
Asclepias verticillata
ID: 0000 0000 0408 1217 [detail]
© 2008 Louis-M. Landry

Asclepias verticillata
Asclepias verticillata
ID: 0000 0000 0408 1216 [detail]
© 2008 Louis-M. Landry

Asclepias verticillata
Asclepias verticillata
Whorled Milkweed
ID: 0000 0000 0710 2092 [detail]
© 2010 Jeff Abbas

Asclepias verticillata
Asclepias verticillata
Whorled Milkweed
ID: 0000 0000 0710 2093 [detail]
© 2010 Jeff Abbas

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0412 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0413 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0414 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0415 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0416 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0417 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0418 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0419 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0420 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0421 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0422 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0423 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0424 [detail]
© 2016 Keir Morse

Asclepias verticillata
Asclepias verticillata
Eastern Whorled Milkweed
ID: 0000 1111 1234 0425 [detail]
© 2016 Keir Morse

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