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(Hymenoxys cooperi)
Cooper’s Rubberweed (Hymenoxys cooperi)
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Andrey Zharkikh
CC BY 2.0
Image By:
Andrey Zharkikh
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Copyright:
CC BY 2.0
Copyright Notice:
Photo by: Andrey Zharkikh | License Type: CC BY 2.0 | License URL: https://creativecommons.org/licenses/by-sa/2.0/ | Uploader: AndreyZharkikh | Publisher: Flickr |
Estimated Native Range
Summary
Hymenoxys cooperi, commonly known as Cooper’s Rubberweed, is a perennial herb native to arid and semi-arid regions, including grasslands, open scrub, and rocky slopes in the Western United States. It typically grows erect to heights between 15 and 90 centimeters (6-36 inches or 0.5-3.0 feet). Cooper’s Rubberweed is characterized by its daisy-like flower heads, which consist of a cup of fused phyllaries with 30–150 tiny yellow-orange disc florets surrounded by 9–14 bright yellow ray florets. These flowers bloom from late spring to early fall and are quite showy, attracting pollinators such as bees and butterflies.
Cooper’s Rubberweed is valued for its drought tolerance and vibrant flowers, making it suitable for xeriscaping and naturalistic plantings in dry climates. It is often used in wildflower mixes and as a border plant in gardens that aim to conserve water. This plant thrives in full sun and requires minimal water once established, preferring well-drained soils. It is not commonly affected by diseases or pests, but overwatering can lead to root rot. Cooper’s Rubberweed is not known for aggressive roots or invasiveness, making it a low-maintenance choice for gardeners.CC BY-SA 4.0
Cooper’s Rubberweed is valued for its drought tolerance and vibrant flowers, making it suitable for xeriscaping and naturalistic plantings in dry climates. It is often used in wildflower mixes and as a border plant in gardens that aim to conserve water. This plant thrives in full sun and requires minimal water once established, preferring well-drained soils. It is not commonly affected by diseases or pests, but overwatering can lead to root rot. Cooper’s Rubberweed is not known for aggressive roots or invasiveness, making it a low-maintenance choice for gardeners.CC BY-SA 4.0
Plant Description
- Plant Type: Herb
- Height: 1-2 feet
- Width: 1-2 feet
- Growth Rate: Moderate
- Flower Color: Yellow
- Flowering Season: Summer
- Leaf Retention: Deciduous
Growth Requirements
- Sun: Full Sun
- Water: Low
- Drainage: Fast
Common Uses
Bee Garden, Butterfly Garden, Drought Tolerant, Low Maintenance, Showy Flowers
Natural Habitat
Native to arid and semi-arid regions, including grasslands, open scrub, and rocky slopes in the Western United States
Other Names
Common Names: Bitterweed, Cooper’s Hymenoxys
Scientific Names: , Hymenoxys cooperi, Hymenoxys cooperi var. canescens, Hymenoxys cooperi var. cooperi, Picradenia cooperi, Actinea cooperi, Actinella richardsonii var. canescens, Hymenoxys cooperi subsp. grayi, Actinella cooperi, Hymenoxys canescens
GBIF Accepted Name: Hymenoxys cooperi (A.Gray) Cockerell