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Tetraneuris acaulis var. acaulis (Pursh) Greene  
Family: Asteraceae
stemless four-nerve daisy
[Actinea acaulis Kuntze, moreActinea acaulis var. simplex (A. Nelson) J.F. Macbr., Actinella acaulis Nutt., Hymenoxys acaulis var. acaulis (Pursh) K.F. Parker, Tetraneuris eradiata , Tetraneuris incana , Tetraneuris septentrionalis , Tetraneuris simplex A.Nelson]
Tetraneuris acaulis var. acaulis image
Patrick Alexander
  • FNA
  • Resources
Mark W. Bierner, Billie L. Turner in Flora of North America (vol. 21)
Plants (3-)10-20(-30+) cm. Leaves: blades spatulate or oblanceolate to linear-oblanceolate, usually densely, sometimes sparsely, strigoso-canescent, sparsely to moderately or densely gland-dotted. Heads 1-10(-15) per plant. Peduncles (2-)8-20(-30) cm. Outer phyllaries 6-10, 4-7 mm, margins 0-0.2(-0.4) mm wide, sometimes slightly scarious, abaxial faces usually densely hairy. Ray florets 8-14; corollas 9-15 mm. Cypselae 2.5-3 mm; pappi 2.2-2.9 mm. 2n = 28, 30, 56, 60. Flowering (Apr-)May-Jul(-Oct). Roadsides, hillsides, grasslands, edges of woods; 700-2000(-3500) m; Alta., Sask.; Colo., Idaho, Kans., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Wyo. Some plants of var. acaulis from Colorado and southeastern Wyoming have considerably less hairy and/or more densely gland-dotted leaves, making them easy to confuse with var. arizonica. As to distribution, label on a collection at LL reads, 'From W. A. Curtis, Lewistown [Idaho], without definite locality but probably collected in that vicinity.' Also, the holotype and isotype of Tetraneuris septentrionalis were collected in 'Palouse County, Idaho.' These are the only collections we have seen that place var. acaulis west of the continental divide.

Tetraneuris acaulis var. acaulis
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Tetraneuris acaulis var. acaulis image
Patrick Alexander
Tetraneuris acaulis var. acaulis image
Patrick Alexander
Tetraneuris acaulis var. acaulis image
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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