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Harperella

Harperella nodosa

In the Carolinas and Georgia, found in rocky or gravelly riverbeds, upland depression ponds, seepage on granite flatrocks. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you

24
Good

Native to Arkansas. How scores work Is it native here?

Profile 88%

Height
Up to about 3 feet
Light
Partial shade, Full sun
Soil moisture
Wet to standing water
Will it fit your yard?

Federally endangered. Excluded from routine garden suggestions. Consult conservation guidance before obtaining or planting this species. Plant caution source

Hidden from default planting suggestions. Wildlife value and native status remain unchanged.

At a glance

Life cycle
Annual
Bloom
June to August

Not yet recorded · Spread · Leaves

Recorded in 3 Arkansas counties.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

1 of 2

Granite and other acidic rock outcrops

Bare or thin-soil rock on granite, gneiss, sandstone, quartzite and similar acidic rock, including granite flatrocks and domes.

Seeps and springs

Places where groundwater keeps the soil or rock wet, such as seepage slopes and spring runs.

All habitats

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in Arkansas. Shared habitat, not food. 131 animals.

All wildlife of Arkansas

Ecological relationships

Who uses this plant?

What these records mean

1CaterpillarsGenus host records with ranges including AR

Genus host records with ranges including AR · Ptilimnium

  • Papilio polyxenesBlack Swallowtail, Celery Caterpillar, Fennel Worm, Desert Black Swallowtail, Parsnip Swallowtail
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
7BeesSoutheastern regional records

Southeastern regional records · Ptilimnium

Individual names are not available yet.

Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
0Specialist beesPollen specialists
—BirdsRecorded genus food-resource interactions; not a state feeding claim

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Apiaceae
Flower color
White
Growing sources and scope
Also known as

Ptilimnium fluviatile; Ptilimnium nodosum; bishopweed

Conservation status

Arkansas rankS2
Global rankG2
AR statusNot verified
Federal statusEndangered (US Fish and Wildlife Service)

Conservation source Global rank source Federal status source: US Fish and Wildlife Service

In your garden

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Sources