Green Antelopehorn (Viridis)

The Green Antelopehorn (Viridis) is generally described as a perennial forb/herb. This is native to the U.S. (United States) .

Uses of : Landscaping, Medicinal, Culinary, etc.

Caution: Poisonous plant. Like many milkweeds, plant parts are thought to be poisonous to cattle, but are rarely consumed. Smith et al. (2000) documents sheep loss to this species. Monarch butterfly eggs are laid on plants in the Asclepias genus. The larvae consume the leaves and the toxins found in Asclepias are also in the larvae and mature butterflies. This provides protection from bird predators. The long silky hairs on the seed were once used in making candlewicks. Other than Monarch butterflies, the plant provides no known wildlife value.

General Characteristics

General: Milkweed Family (Asclepiadaceae). Green antelopehorn is a native, perennial forb or herb. Globally, there are 2,000 – 3,000 species in the milkweed (Asclepiadaceae) family. In Texas, there are five different genera in this family, with 35 species in the Asclepias genus. Asclepias viridis is the most common milkweed in Texas ranging from deep east Texas to the Edwards Plateau and typically has wider leaves than Asclepias asperula. They have alternate, entire leaves. The leaf margins are often wavy. Flowers are white and in an umbel, mostly one per plant. Upon close inspection, some rose or purple color is evident in the center of each individual flower (gynostegium). The milky substance that is exuded when a plant part is broken is very sticky, much resembling “Elmer’s glue.” These milkweeds bloom from late spring to middle summer.

Other milkweeds in Texas, such as Asclepias oenotheroides, Asclepias incarnata, Asclepias viridiflora have similar growth habits and flowers, but do not have alternate leaves.

Required Growing Conditions

Known from Nebraska to Ohio and Texas to Florida. For current distribution, please consult the Plant Profile page for this species on the PLANTS Web site.

General Upkeep and Control

ATAC"Once established, armed saltbush requires very little management. Weed control is the only management we do at the Plant Material Center, and even that is optional. Female plants produce abundant seed and tend to drop their leaves in the fall once seed has mostly matured. Male plants will drop their flowers, but retain most of their leaves. "

Plant Basics
General Type Forb/herb
Growth Duration Perennial
Plant Nativity Native to U.S.

Source: USDA, NRCS, PLANTS Database,
National Plant Data Center, Baton Rouge, LA 70874-4490 USA