Clasping Coneflower
Rudbeckia amplexicaulis
- Native to:
- United States
Michael Gras, M.Ed. (www.flickr.com)
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Rudbeckia
- Species:
- Rudbeckia amplexicaulis
- USDA Symbol:
- DRAM
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 91 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may,jun,jul,aug,sep
- Bloom Colors:
- yellow, dark brown
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★☆☆☆ Butterfly & moth species supported by this genus (NWF)
- Pollen Specialist Bee Keystone:
- ★★★★☆ Native pollen specialist bee species supported by this genus (NWF)
Reported Fauna Sightings
Bees: Epimelissodes obliqua Butterflies:Pearl Crescent (Phyciodes tharos)
Garden & Ecology Notes
- Wildlife Value:
- birds, butterflies
Soil Requirements
- Soil Type:
- well-drained, sandy or loamy soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- prefers open, sunny areas
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 7–21 days
- Notes:
- Seeds germinate readily after cold stratification; sow in fall or stratify for 30-60 days.
Pre-treatment: None required
Establishment: This species is an annual that establishes readily. It occurs from Missouri and Kansas to Mississippi and Texas. Blackeyed susan is much more common in Mississippi than this species.
Source: npn.rngr.net
ORGHPS Germination Guide: Sow @ 20C. Germinates within 3 months.
Where to Buy
Nationwide Seller
- Native Seed Group (seeds)
- Ernst Seeds (seeds)
- Native American Seed (nursery and seeds)
- Sheffield's Seed (seeds)