Oönopsis foliosa var. monocephala
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.
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Colo. +
Sparsely vegetated clay flats, gullies, an … 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 flatseninnikovia, sometimes in Sarcobatus flats +
Phytologia +
1991 +
Oönopsis foliosa var. monocephala +
Oönopsis foliosa +
variety +