Sulphur Hedysarum

Hedysarum sulphurescens

Pollinator plantNitrogen fixer

Growing it

When	Flowers June to July; fruits August to September
Type	wildflower
Sun	Full sun
Water	Low
Soil	pH 6–8
Hardiness	zone 2–6
Mature height	0.8 m
Mature spread	0.75 m
Spacing	0.5 m
Years to maturity	3
Bloom	Jun–Jul
Flower colour	Yellow read from a published flora
In bloom	June July
Fruit	Aug–Sep
Native to	AB

feather-compound leaves about 12 cm long

Where it has been recorded

BothSpecimensObservations

65 squares of about 28 km, each holding at least one record. A square is not a claim that the plant grows throughout it, and an unshaded square is unrecorded rather than empty. Darker squares hold more records, which follows roads and towns as much as it follows the plant. 66 herbarium specimens and 481 field observations this project may redraw. A filled dot is a pressed sheet somebody can re-examine; a hollow ring is a photograph identified by community agreement. Where the dots are dense is where people have looked, not where the plant is commonest, and empty ground is unsurveyed rather than unoccupied. How this map is made.

Which ecoregions the records fall in

Northern Continental Divide south AB: 723 records, high confidence
Eastern Continental Ranges central AB: 181 records, high confidence
Western Alberta Upland central AB: 99 records, high confidence
Fescue Grassland south AB: 9 records, medium confidence
Aspen Parkland central AB / SK: 3 records, low confidence

These are counts of records collected somewhere in the region, which is the resolution of the evidence: the map above shows where inside it. A region with 3 records is not the same claim as one with three hundred, so the count travels with the region. A region missing from this list means nobody has recorded it there, which is not the same as the plant being absent. Records within 900 m of a border count for neither side, because the border is not drawn finely enough to say which one they are on. Source: GBIF occurrence search + PRESERVED_SPECIMEN pass, retrieved 2026-08-24. Boundaries digitised from the National Ecological Framework for Canada v2.2 (Ecological Stratification Working Group 1995), simplified to about 900 m for display: an outline is accurate to roughly a kilometre, not to the metre. How these counts are made.

See every observation, live and current, on GBIF or iNaturalist.

Documented animals

25 documented relationships.

nectar for

A Flower Fly LaManna et al. 2020
Boisduval's Blue LaManna et al. 2020
Brown-tailed Bumble Bee LaManna et al. 2020
Carterocephalus skada Specimen records from iNaturalist.org
Colias christina LaManna et al. 2020
Frigid Bumble Bee Specimen records from www.bumblebeewatch.org
Hylaeus basalis LaManna et al. 2020
Lasioglossum nigroviride LaManna et al. 2020
Megachile frigida LaManna et al. 2020
Megachile gemula LaManna et al. 2020
Megachile lapponica LaManna et al. 2020
Megachile melanophaea LaManna et al. 2020
Megachile pugnata LaManna et al. 2020
Melissa Blue LaManna et al. 2020
Orange-banded Bumble Bee LaManna et al. 2020
Osmia albolateralis LaManna et al. 2020
Osmia bucephala LaManna et al. 2020
Osmia densa LaManna et al. 2020
Osmia inermis LaManna et al. 2020
Osmia nanula LaManna et al. 2020
Osmia nigriventris LaManna et al. 2020
Osmia pentstemonis LaManna et al. 2020
Red-belted Bumble Bee LaManna et al. 2020
Two-ranked Bumble Bee LaManna et al. 2020
Yellow-fronted Bumble Bee LaManna et al. 2020

Also worth knowing

Safety

Toxicity not assessed, absence of a warning is not a guarantee of safety

Edible parts

Roots

Buying it

About $8–$16 per plant (estimate), usually from a native-plant nursery. Estimate (herb default); AB retail as of 2026

Where these numbers came from

Flower detail: not verified, a genus-level estimate