Laënnecia schiedeana

schiedeana (Lessing) G. L. Nesom

Phytologia 68: 224. 1990.

Basionym: Erigeron schiedeanus Lessing Linnaea 5: 145. 1830 (as schiedanum)
Synonyms: Conyza schiedeana (Lessing) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 38. Mentioned on page 36, 37.

Annuals, 10–50 (–100) cm. Leaf-blades: bases ± clasping, faces usually sparsely and finely tomentose (hairs coarse, erect, multicellular) and stipitate or sessile-glandular; proximal spatulate to oblong, 20–50+ × 5–15 mm, usually entire, sometimes 2–6-lobed or toothed distally; distal narrowly oblong to linear, 10–20 × 1–5 mm, mostly entire. Heads borne in (narrowly cylindric) racemiform-paniculiform arrays (proximal in axils of distal leaves). Involucres 4–6 mm. Receptacles 3–4 mm diam. Pistillate florets 60–100+; corollas: ± equaling or surpassing styles, laminae 0.5–1+ mm. Disc-florets 5–8+. Cypselae reddish-brown, 1–1.5 mm, glabrous or sparsely strigillose (hairs 0.05–0.1 mm), sometimes glandular near apices; pappi ± persistent, of 12–20 white to tawny bristles in 1 series, 3.5–4 mm. 2n = 18.


Phenology: Flowering late summer–early fall.
Habitat: Sandy roadsides, stream banks, openings in pine forests
Elevation: 2000–2900 m

Distribution

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Ariz., Colo., N.Mex., Mexico

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Laënnecia schiedeana"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
racemiform-paniculiform +
indeterminate +  and determinate +
John L. Strother +
schiedeana - Lessing G. L. Nesom +
decurrent +
Erigeron schiedeanus +
compound +  and simple +
lobed;spatulate;ovate;obovate;oblong;oblanceolate +
rugulose +  and muricate +
white +  and tawny +
not 2-lipped +  and actinomorphic +
surpassing styles +  and equaling +
beaked +, 2-ribbed +  and 5-ribbed +
reddish-brown +
strigillose +  and glabrous +
compressed +, oblong +  and elliptic or obovate +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Colo. +, N.Mex. +  and Mexico +
2000–2900 m +
sessile-glandular +  and stipitate +
winged +  and beaked +
dispersed +
Sandy roadsides, stream banks, openings in pine forests +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> - 0.7 cm7 mm <br />0.007 m <br /> +
0.4 cm4 mm <br />0.004 m <br /> - 0.6 cm6 mm <br />0.006 m <br /> +
0.05 cm0.5 mm <br />5.0e-4 m <br /> - 0.1 cm1 mm <br />0.001 m <br /> +
1 cm10 mm <br />0.01 m <br /> - 2 cm20 mm <br />0.02 m <br /> +
narrowly oblong;linear +
petiolate +  and sessile +
cauline +  and basal +
spreading;erect +
deltate +
sessile-glandular +  and stipitate +
villous +, tomentose +, hirtellous +  and glabrate +
membranous +
2-carpellate +
persistent +
0.35 cm3.5 mm <br />0.0035 m <br /> - 0.4 cm4 mm <br />0.004 m <br /> +
Flowering late summer–early fall. +
lanceolate +  and linear +
less unequal +  and subequal +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
exalbuminous +
branched +  and simple +
appendaged +  and truncate +
papillate +  and smooth +
Conyza schiedeana +
Laënnecia schiedeana +
Laënnecia +
species +
entire +  and toothed +
50 cm500 mm <br />0.5 m <br /> - 100 cm1,000 mm <br />1 m <br /> +
10 cm100 mm <br />0.1 m <br /> - 50 cm500 mm <br />0.5 m <br /> +
tree +, shrub +  and subshrub +