Difference between revisions of "Laënnecia coulteri"
Phytologia 68: 217. 1990.
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|name=Conyza coulteri | |name=Conyza coulteri | ||
|authority=A. Gray | |authority=A. Gray | ||
| + | |rank=species | ||
|publication_title=Proc. Amer. Acad. Arts | |publication_title=Proc. Amer. Acad. Arts | ||
|publication_place=7: 355. 1868 | |publication_place=7: 355. 1868 | ||
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name=Laënnecia coulteri | name=Laënnecia coulteri | ||
| − | |||
|authority=coulteri (A. Gray) G. L. Nesom | |authority=coulteri (A. Gray) G. L. Nesom | ||
|rank=species | |rank=species | ||
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|publication year=1990 | |publication year=1990 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V20_42.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Laënnecia | |genus=Laënnecia | ||
Revision as of 19:28, 16 December 2019
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
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.