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horsetail milkweed
Plants

Horsetail Milkweed

Asclepias subverticillata

Authorship: (Gray) Vail

Sources

[Lieb 1001]

Taxonomic Classification

KingdomPlantae
PhylumMAGNOLIOPHYTA (Flowering Plants)
ClassMAGNOLIOPSIDA (Dicots)
FamilyASCLEPIADACEAE (Milkweed Family)
GenusAsclepias
Speciessubverticillata

Recent Observations

Sourced from iNaturalist

horsetail milkweed (opens in new tab)
horsetail milkweed
desertyarrowOct 25, 2026Coconino National Forest, Flagstaff, AZ, US
horsetail milkweed (opens in new tab)
horsetail milkweed
dianagambaOct 25, 2026Rio Rancho, NM, US
horsetail milkweed (opens in new tab)
horsetail milkweed
lejones417Oct 23, 2026Buffalo Park, Flagstaff, AZ, US
horsetail milkweed (opens in new tab)
horsetail milkweed
kokobaj0605Aug 30, 2026Trinidad
horsetail milkweed (opens in new tab)
horsetail milkweed
thegrimraptorOct 23, 2026Main Street east of 8th Street (Ratekin Towers), Grand Junction, CO 81501, USA
horsetail milkweed (opens in new tab)
horsetail milkweed
kbicksOct 22, 2026Artesia, NM, US
Horsetail Milkweed · Algodoncillo Cola de Caballo (opens in new tab)
Horsetail Milkweed · Algodoncillo Cola de Caballo
sea-kangarooMay 20, 2026Ash Fork, Arizona, USA
horsetail milkweed (opens in new tab)
horsetail milkweed
morton_sagerOct 22, 2026Magdalena, NM, US
horsetail milkweed (opens in new tab)
horsetail milkweed
shirley23Oct 22, 2026Las Vegas, NM 87701, USA
horsetail milkweed (opens in new tab)
horsetail milkweed
kayla168Oct 20, 2026Sand Bench Trail, Springdale, UT, US

Conservation assessments from the following sources:

  • NatureServe Explorer
  • IUCN Red List
  • Texas Parks & Wildlife — Species of Greatest Conservation Need (SGCN)
Conservation status by source
IUCN Red ListNot assessed
NatureServe Global (opens in new tab)
G4Apparently Secure
NatureServe (Texas) (opens in new tab)
SNRNot Ranked
Texas SGCNNot assessed