Laënnecia coulteri

coulteri (A. Gray) G. L. Nesom

Phytologia 68: 217. 1990. 1990

Basionyms: Conyza coulteri A. Gray Proc. Amer. Acad. Arts 7: 355. 1868
Treatment appears in FNA Volume 20. Treatment on page 38. Mentioned on page 37.

Annuals, 10–150 cm. Leaf blades: bases ± clasping, faces usually both hirtellous to villous and ± glandular-viscid; proximal broadly spatulate to oblong, 20–50 × 10–20 mm, obscurely lobed or coarsely toothed; distal oblong to elliptic, 10–20 × 3–10 mm, coarsely toothed from near bases or entire. Heads in racemiform-paniculiform arrays. Involucres 2.5–3+ mm. Receptacles 2–3 mm diam. Pistillate florets 60–100+; corollas: lengths ± 1/2 styles, laminae 0. Disc florets 5–20. Cypselae pale tan, 0.5–1 mm, glabrous or sparsely strigillose (hairs 0.05–0.1 mm), sometimes stipitate- or sessile-glandular; pappi fragile or readily falling, of 10–30 whitish bristles in 1 series, (2.5–)3.5–4 mm. 2n = 18.


Phenology: Flowering year round, mostly fall.
Habitat: Stream banks, roadsides, other disturbed sites, clays or sands, often alkaline soils
Elevation: -60–1800 m

Distribution

V20-42-distribution-map.gif

Ariz., Calif., Colo., Nev., N.Mex., Tex., Utah, Mexico.

Discussion

J. M. Kingsbury (1964) reported Laënnecia coulteri (as Conyza coulteri) to be toxic to livestock.

Selected References

None.

Lower Taxa

None.

... more about "Laënnecia coulteri"
John L. Strother +
coulteri (A. Gray) G. L. Nesom +
Conyza coulteri +
Ariz. +, Calif. +, Colo. +, Nev. +, N.Mex. +, Tex. +, Utah +  and Mexico. +
-60–1800 m +
Stream banks, roadsides, other disturbed sites, clays or sands, often alkaline soils +
Flowering year round, mostly fall. +
Compositae +
Laënnecia coulteri +
Laënnecia +
species +