Plant Index


 
 
 

Asclepias verticillata

Asclepias verticillata L.

whorled milkweed

Asclepias verticillata (Whorled Milkweed)
Image ID: 19310
Image by: Stuart, Will
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: ASVE
SCIENTIFIC NAME: Asclepias verticillata
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2017-11-20

GENUS INDEX

GENUS CODE: ASCLE
GENUS SCIENTIFIC: Asclepias
GENUS AUTHORITY: L.
GENUS COMMON: Milkweed
GENUS SUMMARY: A genus of about 100 species, herbs, temperate and tropical, of North and Central America.
GENUS IDENTIFICATION:
GENUS REFERENCES: Woodson (1954)=Z; Turner (2009b)=Y; Farmer & Bell (1985)=X.

FAMILY INDEX

FAMILY CODE: APOCYN
FAMILY SCIENTIFIC: Apocynaceae
FAMILY AUTHORITY: A.L. de Jussieu 1789
FAMILY COMMON: Dogbane Family
FAMILY SUMMARY: As here circumscribed including the Asclepiadaceae, a family of about 480 genera and about 4800 species, lianas, shrubs, herbs, and trees, widespread in tropical and temperate areas. There appears to be overwhelming evidence favoring the combination of the Asclepiadaceae into the Apocynaceae; see, for instance, Rosatti (1989), Sennblad & Bremer (1996), and many others.
FAMILY REFERENCE: Rosatti (1989); Liede (1997a).

NCBG DESCRIPTIVES

INTRO: Erect to ascending perennial found in barrens, sandhills, dry woodlands and on thin soils of rock outcrops, especially mafic rocks.
STEMS: Stem solitary, branched in upper portions, bearing vertical lines of hairs above; leaks milky sap when bruised.
LEAVES: Leaves in whorls of 3–6 (though opposite at some nodes), linear, 1-3 in. long, with margins noticeably rolled downward, sparsely hairy.
INFLORESCENCE:
FLOWERS: Flowers in small dense terminal and upper axillary umbels, white to greenish-white, about 1/3 in. long, consisting of 5 strongly reflexed green-suffused-with-purple corolla lobes and a whitish central crown--composed of 5 2-parted appendages (“hood” and “horn”)--surrounding a complex structure of fused anthers and style.
FRUITS: Fruit a narrowly spindle-shaped, erect follicle containing tufted seeds.
COMMENTS:
HEIGHT: 8-24 in.

DURATION: Perennial
HABIT: Herb

LEAF ARRANGEMENT: Whorled
LEAF COMPLEXITY: Simple
LEAF RETENTION:

FLORAL CHARACTERISTICS
SYMMETRY: Radial (Actinomorphic)
BLOOM TIME: May-Sep
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x x x x x

BLOOM COLOR: White
White Red Pink Orange Yellow Green Blue Lavender Purple Violet Brown Not Applicable
x x

FRUITING PERIOD: Sep-Oct.

DISTRIBUTION
HABITAT TYPE: Outcrops and glades, Sandhills, Woods margins
NATIVE RANGE: eastern North America

HORTICULTURAL
Plant Sale Text: Whorled milkweed is an attractive plant that is infrequently offered for sale by nurseries. Its white flowers and fine textured foliage make it a desirable garden plant and its predilection for thin soils makes it very drought tolerant. Over time, it can spread by rhizomes to form a nice clump. Milkweeds are best known as the larval host plants for Monarch caterpillars but they’re also popular with butterfly gardeners because they attract many pollinators and beneficial insects with their nectar. We’ve read that this species is more toxic than some of the other milkweeds and may be unattractive to deer.

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Dry, Average
LIGHT EXPOSURE: Sun, Part Shade
MINIMUM HARDINESS ZONE: 4
MAXIMUM HARDINESS ZONE: 8
GERMINATION CODE:
WILDLIFE VALUE: Bee Friendly, Butterfly Friendly
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
243 2011-0083 2011-04-28 246 View
281 2011-0138 2011-06-16 286 View
338 2011-0207 2011-10-14 342 View
5455 1995-0578 View
6629 1996-0267 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
246 HORT 2009-11-30 Poythress View
286 HORT 2009-01-01 NCBG staff View
342 HORT 2010-11-17 Schubert View
2073 NPMD 2020-10-19 Marzolf View
2238 NPMD 2019-09-16 Touloupas View
2282 NPMD 2019-10-14 Touloupas View
2289 NPMD 2019-10-15 Touloupas View
2378 NPMD 2019-12-03 Touloupas View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
554 243 41 NCBG staff 2011-04-21 View
555 243 41 NCBG staff 2011-05-16 View
672 281 21 NCBG staff 2011-04-08 View
814 338 41 Liloia 2011-10-04 View
815 338 16 Liloia 2015-06-01 View
7969 5455 204 NCBG staff 1993-01-01 View
9382 6629 8 NCBG staff 1996-03-05 View

USDA PLANTS DATABASE

USDA Symbol: ASVE
USDA Common Name: Whorled Milkweed
Native Status: L48 (N), CAN (N)
Distribution: USA (AL, AR, AZ, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MN, MO, MS, MT, NC, ND, NE, NJ, NM, NY, OH, OK, PA, RI, SC, SD, TN, TX, VA, VT, WI, WV, WY), CAN (MB, ON, SK)
Duration: Perennial
Growth Habit: Forb/herb

NATIONAL WETLAND INDICATOR STATUS

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FACU FACU FACU FACU FACU UPL FACU

This information is derived from the U.S. Army Corps of Engineers 2016 National Wetland Plant List, Version 3.3 (Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X). Regions: AGCP-Atlantic and Gulf Coastal Plain, AK-Alaska, AW-Arid West, CB-Caribbean, EMP-Eastern Mountains and Piedmont, GP-Great Plains, HI-Hawaii, MW-Midwest, NCNE-Northcentral and Northeast, WMCV-Western Mountains, Valleys & Coast

WEAKLEY FLORA

SCIENTIFIC NAME: Asclepias verticillata
COMMON NAME: Whorled Milkweed
SYNONYMY: [= C, F, G, Il, K, Pa, RAB, S, Va, W, WH3, Z]
PHENOLOGY: May-Sep; Sep-Oct.
HABITAT: Barrens, thin soils of rock outcrops (especially mafic rocks), thin woodlands, sandhills.
COMMENTS: E. MA west to ND and MB, south to s. FL, TX, NM, and AZ.
RANGE MAP: Asclepias verticillata.png

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Apocynaceae A.L. de Jussieu 1789 (Dogbane Family)
SUMMARY: As here circumscribed including the Asclepiadaceae, a family of about 480 genera and about 4800 species, lianas, shrubs, herbs, and trees, widespread in tropical and temperate areas. There appears to be overwhelming evidence favoring the combination of the Asclepiadaceae into the Apocynaceae; see, for instance, Rosatti (1989), Sennblad & Bremer (1996), and many others.
REFERENCE: Rosatti (1989); Liede (1997a).
ABOUT GENUS (Weakley Flora)
Asclepias L. (Milkweed)
SUMMARY: A genus of about 100 species, herbs, temperate and tropical, of North and Central America.
REFERENCE: Woodson (1954)=Z; Turner (2009b)=Y; Farmer & Bell (1985)=X.

HERBARIUM RESOURCES

SERNEC: Find Asclepias verticillata in Southeast Regional Network of Experts and Collections (if available)
UNC SERNEC: Find Asclepias verticillata in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)

WEB RESOURCES

USDA: Find Asclepias verticillata in USDA Plants
NPIN: Find Asclepias verticillata in NPIN Database
FNA: Find Asclepias verticillata in the Flora of North America (if available)
Google: Search Google for Asclepias verticillata

NCBG IMAGE RECORDS

ID IMAGE1: 19310
ID IMAGE2: 0
ID IMAGE3: 12307

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29 photo(s) available in the Image Gallery

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