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Flaigg, Norman G.
Asclepias oenotheroides Cham. & Schlecht.
Zizotes milkweed, Hierba de Zizotes, Longhorn milkweed, Side-cluster milkweed, Primrose milkweed, Lindheimer's milkweed
Synonyms: Asclepias brevicornu, Asclepias lindheimeri
USDA Symbol: asoe
USDA Native Status: Native to U.S.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Green
Bloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep
CO , LA , NM , OK , TX Native Habitat:
Sandy or gravelly ground, prairies, ditches and fields. Can be poisonous to livestock. Prefers sandy, dry soil. USDA Native Status: L48(N)
Growing ConditionsLight Requirement: Sun
Conditions Comments: This member of the Milkweed family loves full sun and tolerates sandy, dry soils. Great for butterfly gardens. Purple tinge comes to upper leaves in full sun.
A well-documented larval host for Monarch butterflies. Warning:
All plants in the genus Asclepias
are probably somewhat toxic, some fatally so, to both humans and other animals. The sap
of some, including Asclepias oenotheroides
, causes skin irritation in humans. The word zizotes in this plants common name is a Spanish term meaning skin sores. Sensitivity to a toxin varies with a personís age, weight, physical condition, and individual susceptibility. Children are most vulnerable because of their curiosity and small size. Toxicity can vary in a plant according to season, the plantís different parts, and its stage of growth; and plants can absorb toxic substances, such as herbicides, pesticides, and pollutants from the water, air, and soil. Conspicuous Flowers:
Butterflies Larval Host:
Monarch butterfly Nectar Source:
Herbarium Specimen(s)NPSOT 0182
Collected Oct. 8, 1991 in Bexar County by Lottie MillsapsNPSOT 0259
Collected Aug. 16, 1992 in Comal County by Mary Beth WhiteNPSOT 0126
Collected Sept. 7, 1991 in Bexar County by Lottie Millsaps
Wildflower Center Seed BankLBJWC-500
Collected 2007-06-18 in Travis County by Lady Bird Johnson Wildflower Center
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Record Modified: 2009-05-04
Research By: NPC, RLU, GDG