Coastal Plain Honeycombhead Balduina angustifolia
Coastal Plain Honeycombhead is an annual wildflower native to the lower 48 states. It blooms Aug – Dec. A host for pollen-specialist native bees.
More about this plant
Balduina angustifolia, the coastal plain honeycombhead, is a species of plants in the sunflower family that grows in North America. It is native to the southeastern United States. An herb with branching stems. Each plant has 20 or more flower heads, each with yellow ray florets and yellow disc florets. The species grows in sandy soil, often in pinelands. According to the Florida Wildflower foundation it is an annual or biennial. Wikipedia →
Growing & care
USDA PLANTS · TRY- Hardiness
- ≥ zone 9 derived from its U.S. range
- Lifespan
- Annual
- 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 Balduina in North America, including:
✦ Bees specialist-bee host · 49 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. Balduina is a recorded specialist-bee host, so losing it can mean losing the bee that relies on it.
49 native & managed bee species are documented visiting Coastal Plain Honeycombhead — the 12 most-recorded:
Wildlife & visitors 18 nectaring
Open records of who else uses Coastal Plain Honeycombhead — a generalist food-web signal, kept separate from the keystone Ecological Value.
18 adult butterfly & moth species are recorded nectaring at its flowers — the most-recorded:
Across 40 U.S. vegetation-survey plots that recorded Coastal Plain Honeycombhead, these catalog species turned up most often in the same plot — a real field co-occurrence signal, not a planting prescription.
Related plants
More Balduina →
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).
Loading…
BibTeX
Loading…