Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Opuntia humifusa (Raf.) Raf. var. humifusa image
Photographer: William Tans           

Botanical Illustration

Kenneth J. Sytsma

Merel R. Black

Merel R. Black
Family Cactaceae
Opuntia humifusa (Raf.) Raf. var. humifusa
[Excluded] eastern prickly-pear cactus
Opuntia: Greek name used by Pliny for a different plant which grew around the town of Opus in Greece
humifusa: spreading, prostrate
Status: Excluded
Plant: prostrate/spreading/erect, perennial, 2"-8" tall, spiny shrub forming large mats; stems branched, the joints flattened; pads elliptical; roots usually fibrous
Flower: yellow, sometimes with a red center, 7 or more-parted, up to 3" wide; blooms June-July
Fruit:red-purple, fleshy, wingless, edible; seeds disc-like with hard, regular edges seed drawing
Leaf:spines usually single or sometimes paired
Habitat: dry; prairies, rocks, inland sands; in rocky, sandy soil

More Information Natural Communities Herbarium Specimens
All Opuntia list Google- Images or Text

Flora of North America (off site)
Opuntia austrina Small
Opuntia calcicola Wherry
Opuntia compressa auct. non J.F.Macbr.
Opuntia compressa J.F.Macbr. var. allairei (Griffiths) Weniger
Opuntia compressa J.F.Macbr. var. austrina (Small) L.D.Benson
Opuntia compressa J.F.Macbr. var. compressa
Opuntia compressa J.F.Macbr. var. fuscoatra (Engelm.) Weniger
Opuntia compressa J.F.Macbr. var. microsperma (Engelm. & Bigelow) L.D.Benson
Opuntia humifusa (Raf.) Raf. var. ammophila (Small) L.D.Benson
Opuntia humifusa (Raf.) Raf. var. austrina (Small) Dress
Opuntia impedata Small ex Britton & Rose
Opuntia opuntia (L.) H.Karst.
Opuntia rafinesquei Engelm.

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