Oönopsis foliosa var. monocephala

(A. Nelson) Kartesz & Gandhi

Phytologia 71: 60. 1991.

Basionym: Oönopsis monocephala A. Nelson Bot. Gaz. 31: 399. 1901
Synonyms: Haplopappus fremontii subsp. monocephalus (A. Nelson) H. M. Hall
Treatment appears in FNA Volume 20. Treatment on page 412.

Heads 1–5(–6). Ray florets 0. Disc florets 66–150. 2n = 20.


Phenology: Flowering Jun–Aug.
Habitat: Sparsely vegetated clay flats, gullies, and eroding toeslopes of limestone hills, alkaline, clayey, and calcareous soils with moderate to high erosion potential, usually in shortgrass prairies, also with Artemisia, Yucca glauca, Krascheninnikovia, sometimes in Sarcobatus flats
Elevation: 1200–1800 m

Discussion

Of conservation concern.

Variety monocephala is known only from Las Animas County. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.
Gregory K. Brown +  and Guy L. Nesom +
(A. Nelson) Kartesz & Gandhi +
Oönopsis monocephala +
1200–1800 m +
Sparsely vegetated clay flats, gullies, anSparsely vegetated clay flats, gullies, and eroding toeslopes of limestone hills, alkaline, clayey, and calcareous soils with moderate to high erosion potential, usually in shortgrass prairies, also with Artemisia, Yucca glauca, Krascheninnikovia, sometimes in Sarcobatus flatseninnikovia, sometimes in Sarcobatus flats +
Flowering Jun–Aug. +
Haplopappus fremontii subsp. monocephalus +
Oönopsis foliosa var. monocephala +
Oönopsis foliosa +
variety +