| Yellow joyweed
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| Alternanthera flavescens
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| Amaranthaceae
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Landscape Uses:
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Primarily recommended for natural landscapes and habitat restorations. Also butterfly gardens along the coast. |
Ecological Restoration Notes: |
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A common element of beach dunes and coastal strand nearly throughout coastal South Florida. |
| Availability: |
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Grown by enthusiasts. |
| Description: |
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Small scrambling herb. |
| Height: |
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Typically 3-12 inches in height or higher, climbing over the ground or other vegetation and forming large patches. |
| Growth Rate: |
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Moderate. |
| Range: |
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Monroe County Keys north along the coasts to Brevard (southern Merritt Island) and Manatee counties; West Indies (where possibly introduced in part), southern Mexico, Central America and South America. |
| Habitats: |
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Coastal beaches, thickets, and hammock edges. |
| Soils: |
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Moist, well-drained sandy soils, with or without humusy top layer. |
| Nutritional Requirements: |
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Low; it grows in nutrient poor soils. |
| Salt Water Tolerance: |
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Low; does not tolerate long-term flooding by salt or brackish water. |
| Salt Wind Tolerance: |
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Frontline; grows in direct salt wind but away from constant salt spray. |
| Drought Tolerance: |
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High; does not require any supplemental water once established. |
| Light Requirements: |
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Full sun to light shade. |
| Flower Color: |
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White. |
| Flower Characteristics: |
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Inconspicuous. |
| Flowering Season: |
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All year; peak spring-summer. |
| Fruit: |
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Inconspicuous utricle. All year. |
| Wildlife and Ecology: |
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Nectar plant for cassius blue (Leptotes cassius), great southern white (Ascia monuste), long-tailed skipper (Urbanus proteus), Miami blue (Cyclargus thomasi bethunebakeri), Schaus’ swallowtail (Papilio aristodemus ponceanus) and other butterflies. |
| Horticultural Notes: |
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Can be grown from cuttings. |
| Comments: |
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This is much more common in South Florida than seaside joyweed (A. maritima), which does not have stalked flowering clusters. |
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James Johnson, 2014 In habitat, Blazingstar Preserve, Palm Beach County, Florida
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James Johnson, 2014 In habitat, John Pennekamp Coral Reef State Park, Monroe County, Florida
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