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Helianthella uniflora (Nutt. ) Torr. & A. Gray
ONEFLOWER HELIANTHELLA
Life   Plantae   Dicotyledoneae   Asteraceae   Helianthella


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Following modified from Flora of North America
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FNA | Family List | FNA Vol. 21 | Asteraceae | Helianthella

4. Helianthella uniflora (Nuttall) Torrey & A. Gray, Fl. N. Amer. 2: 334. 1842.

Helianthus uniflorus Nuttall, J. Acad. Nat. Sci. Philadelphia 7: 37. 1834; Helianthella uniflora var. douglasii (Torrey & A. Gray) W. A. Weber

Plants 40—120 cm. Cauline leaves: largest at mid stems; blades usually 3-nerved, usually lanceolate to elliptic, rarely ovate, 12—25 cm, faces puberulent, hirsute, or scabrous. Heads usually borne singly, sometimes 2—3+, erect. Involucres turbinate to hemispheric or broader, 15—30 mm diam. Phyllaries lanceolate to lance-linear (subequal or outer larger, margins sometimes ciliate, faces ± cinereous-pubescent to sparsely puberulent). Paleae chartaceous, relatively firm. Ray florets 11—13(—21); laminae 15—30(—45) mm. Disc corollas yellow. Cypselae strongly compressed, narrowly obovate (margins ciliate, faces strigose); pappi of 2 ± subulate scales plus 2—4 shorter scales. 2n = 30.

Flowering May—Jul(—Aug). Grasslands, meadows, sagebrush scrublands, swales, aspen forests, rocky slopes, and spruce-fir forests; 300—3400 m; B.C.; Ariz., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Two infraspecific taxa within Helianthella uniflora may be distinguished; they have been named at varietal rank.

Variety douglasii has stems hirsute; involucres (15—)20—25(—30) mm diam.; outer phyllaries rarely elongated, margins ciliate, abaxial faces sparsely puberulent; ray laminae 30—40 mm; and 2 n = 30. It grows in grasslands in the northern Rocky Mountains and on the east side of the Cascade Range (B.C.; Idaho, Oreg., Wash.) at 300—2500 m where it flowers May—Jul.

Variety uniflora has stems sparingly puberulent to scabrous; involucres 15—20(—25) mm diam.; outer phyllaries frequently elongated, margins not ciliate, abaxial faces uniformly cinereous-pubescent; ray laminae 20—30 mm; and 2 n = 30. It grows in meadows, sagebrush scrublands, swales, aspen forests, rocky slopes, and spruce-fir forests of the Rocky Mountains, intermountain plateaus, and Great Basin ranges (Ariz., Colo., Idaho, Mont., Nev., Oreg., Utah, Wyo.) at 1500—3400 m, where it flowers (May—)Jun—Jul(—Aug).

Following modified from CalPhotos
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CalPhotos     Photo Database

 

Number of matches : 11
Query: SELECT * FROM img WHERE ready=1 and taxon like "Helianthella uniflora%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Helianthella uniflora
Helianthella uniflora
Oneflower Helianthella
ID: 0000 0000 0512 1103 [detail]
© 2012 Gary A. Monroe

Helianthella uniflora
Helianthella uniflora
Oneflower Helianthella
ID: 0000 0000 0512 1104 [detail]
© 2012 Gary A. Monroe

Helianthella uniflora
Helianthella uniflora
Oneflower Helianthella
ID: 0000 0000 0512 1105 [detail]
© 2012 Gary A. Monroe

Helianthella uniflora
Helianthella uniflora
ID: 0000 0000 1012 0686 [detail]
© 2012 Jean Pawek

Helianthella uniflora
Helianthella uniflora
ID: 0000 0000 1012 0962 [detail]
© 2012 Jean Pawek

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
ID: 0000 0000 1008 1921 [detail]
© 2008 Trent M. Draper

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
ID: 0000 0000 1008 1922 [detail]
© 2008 Trent M. Draper

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
ID: 0000 0000 1008 1923 [detail]
© 2008 Trent M. Draper

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
Oneflower Helianthella
ID: 0000 0000 1215 1019 [detail]
© 2015 Richard Spellenberg

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
Oneflower Helianthella
ID: 0000 0000 1215 1020 [detail]
© 2015 Richard Spellenberg

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
Oneflower Helianthella
ID: 0000 0000 1215 1021 [detail]
© 2015 Richard Spellenberg

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


Copyright © 1995-2016 UC Regents. All rights reserved.

CalPhotos is a project of BSCIT      University of California, Berkeley

Following modified from CalPhotos
   Top | See original


CalPhotos     Photo Database

 

Number of matches : 6
Query: SELECT * FROM img WHERE ready=1 and taxon like "Helianthella uniflora var. uniflora%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
ID: 0000 0000 1008 1921 [detail]
© 2008 Trent M. Draper

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
ID: 0000 0000 1008 1922 [detail]
© 2008 Trent M. Draper

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
ID: 0000 0000 1008 1923 [detail]
© 2008 Trent M. Draper

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
Oneflower Helianthella
ID: 0000 0000 1215 1019 [detail]
© 2015 Richard Spellenberg

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
Oneflower Helianthella
ID: 0000 0000 1215 1020 [detail]
© 2015 Richard Spellenberg

Helianthella uniflora var. uniflora
Helianthella uniflora var. uniflora
Oneflower Helianthella
ID: 0000 0000 1215 1021 [detail]
© 2015 Richard Spellenberg

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


Copyright © 1995-2016 UC Regents. All rights reserved.

CalPhotos is a project of BSCIT      University of California, Berkeley

Updated: 2017-06-24 02:21:24 gmt
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