Rayjacksonia annua

(Rydberg) R. L. Hartman & M. A. Lane

Amer. J. Bot. 83: 368. 1996

Common names: Viscid camphor-daisy
Basionyms: Sideranthus annuus Rydberg Bull. Torrey Bot. Club 31: 653. 1905
Synonyms: Haplopappus annuus (Rydberg) Cory Machaeranthera annua (Rydberg) Shinners
Treatment appears in FNA Volume 20. Treatment on page 438.

Annuals, 20–100 cm, herbaceous or suffrutescent. Leaf blades oblanceolate to oblong or oblong-lanceolate, mid-cauline (1–)4–15(–25) mm wide. Heads on short, sometimes bracteate peduncles, not surpassed by distal leaves. Involucres (4.5–)6–9 × 9–15(–20) mm. Phyllaries in 3–4 series, loose, strongly unequal, apices broadly spreading to squarrose, ca. 0.9–1 mm wide, herbaceous. Ray florets (13–)20–36; corollas 6–11(–14) mm. Disc florets: corolla tubes ± equaling limbs. 2n = 12.


Phenology: Flowering (Jul–)Aug–Oct.
Habitat: Sand or sandy loam, prairies, stream sides and bottoms, alkaline flats, salt marsh edges, roadsides
Elevation: 1000–1700 m

Distribution

V20-1003-distribution-map.gif

Colo., Kans., Nebr., N.Mex., Okla., Tex., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Rayjacksonia annua"
Guy L. Nesom +
(Rydberg) R. L. Hartman & M. A. Lane +
Sideranthus annuus +
Viscid camphor-daisy +
Colo. +, Kans. +, Nebr. +, N.Mex. +, Okla. +, Tex. +  and Wyo. +
1000–1700 m +
Sand or sandy loam, prairies, stream sides and bottoms, alkaline flats, salt marsh edges, roadsides +
Flowering (Jul–)Aug–Oct. +
Amer. J. Bot. +
Haplopappus annuus +  and Machaeranthera annua +
Rayjacksonia annua +
Rayjacksonia +
species +