Difference between revisions of "Helianthus laevigatus"
Fl. N. Amer. 2: 330. 1842.
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|common_names=Smooth sunflower | |common_names=Smooth sunflower | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
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|basionyms= | |basionyms= | ||
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|publication title=Fl. N. Amer. | |publication title=Fl. N. Amer. | ||
|publication year=1842 | |publication year=1842 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_378.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | ||
Revision as of 20:59, 27 May 2020
Perennials, 100–220 cm (rhizomatous). Stems erect, usually glabrous, sometimes proximally hirsute (glaucous). Leaves cauline; opposite (proximal) or alternate; sessile or subsessile; blades (grayish green or bluish green) lanceolate, 8–15 × 1.5–3.5 cm, bases ± cuneate, margins serrate to subentire, abaxial faces glabrous or glabrate (smooth or slightly rough to touch, glaucous). Heads 1–6. Peduncles 2–8 cm. cm. Involucres cylindric, 10–15 mm diam. Phyllaries 23–28, lanceolate, 6–13 × 2–3 mm, (margins sometimes ciliate) apices acuminate, abaxial faces glabrous, not gland-dotted. Paleae 8.5–10 mm, 3-toothed to subentire. Ray florets 5–10; laminae 15–20 mm. Disc florets 35+; corollas 5.5–6.5 mm, lobes yellow; anthers dark, appendages dark. Cypselae 4–5.5 mm, glabrous; pappi of 2 aristate scales 3.2–4.1 mm plus 0–1 deltate scales 0.5–1.1 mm. 2n = 68.
Phenology: Flowering late summer–fall.
Habitat: Shale barrens
Elevation: 300–900+ m
Distribution
N.C., S.C., Va., W.Va.
Discussion
Selected References
None.