Rayjacksonia annua

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

Amer. J. Bot. 83: 368. 1996

Common names: Viscid camphor-daisy
Synonyms: Haplopappus annuus (Rydberg) CoryMachaeranthera annua (Rydberg) Shinners
Basionyms: Sideranthus annuus Rydberg
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



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




Lower Taxa

No lower taxa listed.