Clammy Locust
Robinia viscosa
- Native to:
- United States
Redouté, Pierre Joseph, 1759-1840 (Artist) / Duhamel du Monceau, M., 1700-1782 (Author) / cropped and adjusted by the uploader






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Fabaceae
- Genus:
- Robinia
- Species:
- Robinia viscosa
- USDA Symbol:
- ROVI
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Shrub , Tree
- Height:
- 1200 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may,jun
- Bloom Colors:
- pink, rose
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★☆ Butterfly & moth species supported by this genus (NWF)
Host Plant for Caterpillars
Banded Tussock Moth (Halysidota tessellaris), Io moth (Automeris io), locust leafminer (Phyllonorycter robiniella), Nephopterix subcaesiella, Silver-spotted Skipper (Epargyreus clarus)
Garden & Ecology Notes
- Wildlife Value:
- bees, butterflies, birds
- Deer Resistant:
- Yes
- Fragrant:
- Yes
- Fall Color:
- yellow
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts vigorously from root crown and root suckers following fire or cutting. Often increases in abundance after disturbance.
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:
- native to southeastern United States; prefers open woods and rocky slopes
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–90 days
- Scarification:
- Seed coat scarification required before sowing
- Germination Time:
- 14–42 days
- Notes:
- Scarification by mechanical abrasion or hot water treatment improves germination. Seeds have hard seed coats requiring pre-treatment.
The above propagation data sourced from Claude AI
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Source: Claude AI