Difference between revisions of "Rayjacksonia annua"
Amer. J. Bot. 83: 368. 1996.
Common names: Viscid camphor-daisy
Basionym: 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.
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Rayjacksonia | |genus=Rayjacksonia | ||
Revision as of 20:22, 16 December 2019
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
Colo., Kans., Nebr., N.Mex., Okla., Tex., Wyo.
Discussion
Selected References
None.
Lower Taxa
None.