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Green antelopehorn
Asclepias viridis
Apocynaceae
 

Copyright by: Roger L. Hammer

General Landscape Uses: Primarily recommended for natural landscapes and habitat restorations. Also butterfly gardens.

Ecological Restoration Notes: A somewhat rare understory herb in pine rocklands.

Availability: Rarely grown by native plant nurseries.

Description: Small to medium herb with erect or sprawling stems and oblong leaves.

Dimensions: About 6-24 inches in height. Taller than broad, but then falling over and spreading.

Growth Rate: Moderate.

Range: Eastern and central United States west to Texas and south to central Florida; disjunct in Miami-Dade County and the Monroe County Keys. In the Monroe County Keys, disjunct from Miami-Dade County to the pine rocklands of Big Pine Key, where very rare.

Plant Map Map of select IRC data from peninsular Florida.

 Map of Postal Code Areas of IRC data from peninsular Florida.

Habitats: Pine rocklands.

Soils: Moist, well-drained limestone soils, without humus.

Nutritional Requirements: Low; it grows in nutrient poor soils.

Salt Water Tolerance: Low; does not tolerate flooding by salt or brackish water.

Salt Wind Tolerance: Moderate; grows near salt water, but is protected from direct salt spray by other vegetation.

Drought Tolerance: High; does not require any supplemental water once established.

Light Requirements: Full sun.

Flower Color: Green with purple hoods.

Flower Characteristics: Showy, about 1/2" wide.

Flowering Season: Winter-summer; peak spring.

Fruit: Pod (follicle) with wind dispersed seeds, wide at the base and tapering toward the tip.

Wildlife and Ecology: Larval host plant for monarch (Danaus plexippus) and queen (Danaus gilippus) butterflies; possible larval host for soldier (Danaus eresimus) butterflies. Nectar plant for monarch butterflies. Attracts native bees and other beneficial insects.

Horticultural Notes: Can be grown from seed.

Comments: The plant is poisonous to livestock. See also the Florida Wildflower Foundation's Flower Friday page and Monarchs & Milkweed flyer.


Copyright by: Roger L. Hammer

Copyright by: Lilly Anderson-Messec via her Instagram account @lilliumbyrd.

Copyright by: Lilly Anderson-Messec via her Instagram account @lilliumbyrd.


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