Greene's Rabbitbrush Chrysothamnus greenei
Greene's Rabbitbrush is a perennial shrub native to the lower 48 states. It grows to 2.1 ft and blooms Jul – Oct. A host for pollen-specialist native bees.
More about this plant
Chrysothamnus greenei, called Greene's rabbitbrush , is a North American species of flowering plants in the tribe Astereae within the family Asteraceae. It has been found in eastern California, Nevada, Arizona, New Mexico, Utah, Colorado, and southern Wyoming. Wikipedia →
Growing & care
USDA PLANTS · TRY- Hardiness
- ≥ zone 6 derived from its U.S. range
- Height
- 2.1 ft
- Lifespan
- Perennial
- Foliage
- Broadleaf
- Flower colour
- Yellow AI AI image-analysis of community-science photos (~87% expert agreement) — not a botanical record
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts Documented caterpillar host
Recorded feeding on Chrysothamnus in North America, including:
+ 8 more species → ↑ show fewer
✦ Bees specialist-bee host · 41 bee visitors
Specialist native bees depend on it.
Some native bees are pollen specialists (oligolectic) — they raise young only on pollen from particular plant genera. Chrysothamnus is a recorded specialist-bee host, so losing it can mean losing the bee that relies on it.
41 native & managed bee species are documented visiting Greene's Rabbitbrush — the 12 most-recorded:
+ 6 more bees → ↑ show fewer
Across 245 U.S. vegetation-survey plots that recorded Greene's Rabbitbrush, these catalog species turned up most often in the same plot — a real field co-occurrence signal, not a planting prescription.
Related plants
More Chrysothamnus →
How we know this (2) Methods & honest limits
We take the plant’s U.S. county range and look up each county’s long-term climate, then summarise: native rainfall = the median annual rainfall across its counties; heat tolerance = the warm end (90th percentile) of average temperature across its range (mirroring how our cold-hardiness floor uses an extreme). Counties + medians blunt the roadside/observer bias that makes point-level climate unreliable. Needs at least five placeable counties.
Honest limits: A realized, sampling-biased niche (where it has been recorded, not its physiological optimum), and county climate is coarse — large Western counties span deserts and mountains. Derived guide, never a measured fact.
McKenzie et al. assigned each species a flower colour with a GPT-4V vision model over iNaturalist photos. We use the confident tier plus a separately-labelled lower-confidence top-up (mostly inconspicuous green/brown flowers), and render it as a small tint — never as an asserted fact, and kept out of the written synopsis.
Honest limits: AI image inference (~87% expert agreement on the confident tier); a decorative, confidence-tiered indicator, not a measured trait.
Sources for this entry (22) Open & cited
Cite this page Open data, please attribute
PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).
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