Difference between revisions of "Heliopsis"
Syn. Pl. 2: 473. 1807.
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|distribution=North America;Mexico;Central America;South America (to Bolivia). | |distribution=North America;Mexico;Central America;South America (to Bolivia). | ||
|discussion=<p>Species ca. 18 (3 in the flora).</p><!-- | |discussion=<p>Species ca. 18 (3 in the flora).</p><!-- | ||
| − | --><p>Most species of Heliopsis are known only from Mexico.</p> | + | --><p>Most species of <i>Heliopsis</i> are known only from Mexico.</p> |
|tables= | |tables= | ||
|references={{Treatment/Reference | |references={{Treatment/Reference | ||
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|family=Asteraceae | |family=Asteraceae | ||
|illustrator=Marjorie C. Leggitt | |illustrator=Marjorie C. Leggitt | ||
| + | |illustration copyright=Flora of North America Association | ||
|distribution=North America;Mexico;Central America;South America (to Bolivia). | |distribution=North America;Mexico;Central America;South America (to Bolivia). | ||
|reference=fisher1957a | |reference=fisher1957a | ||
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|publication year=1807 | |publication year=1807 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_145.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ecliptinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ecliptinae | ||
Latest revision as of 20:10, 5 November 2020
Perennials [annuals], 30–150 cm. Stems erect or trailing, branched from bases or ± throughout. Leaves cauline; opposite; petiolate; blades ± 3-nerved from bases, deltate or ovate to lanceolate, bases ± cuneate to subtruncate, margins serrate or coarsely toothed, faces glabrous or hairy. Heads radiate [discoid], borne singly. Involucres turbinate to hemispheric, 8–14 mm diam. Phyllaries persistent, 12–20 in 2–3 series (ovate or oblong, ± equal, outer more foliaceous than inner). Receptacles convex to conic, paleate (paleae tardily falling, yellowish, conduplicate, becoming chartaceous). Ray florets [0] 5–20, pistillate, fertile; corollas yellow to orange (laminae persistent, sessile, becoming papery). Disc florets 30–150+, bisexual, fertile; corollas yellow or brown to purple, tubes much shorter than narrowly cylindric throats, lobes 5, deltate. Cypselae (brown to black-brown) subterete or obscurely 3(ray)- or 4(disc)-angled (not winged); pappi 0, or persistent, coroniform (each a laciniate crown plus 1–3 toothlike scales). x = 14.
Distribution
North America, Mexico, Central America, South America (to Bolivia).
Discussion
Species ca. 18 (3 in the flora).
Most species of Heliopsis are known only from Mexico.
Selected References
Key
| 1 | Aerial stems 1–2+ (from creeping rhizomes 4–10+ cm × 1–2 mm, rhizome internodes ca. 20+ mm); heads 1–3(–5); rays 6–8(–13) | Heliopsis gracilis |
| 1 | Aerial stems 1–10+ (from ± erect caudices, or from creeping rhizomes to 4 cm × 2–6 mm, rhizome internodes 2–10 mm); heads 1–15+; rays 9–18 | > 2 |
| 2 | Leaf blades (1.5–)3–6 × 0.8–3 cm, faces sparsely pubescent to glabrescent; peduncles (6–)15–30 cm; cypselae rugulose to subtuberculate | Heliopsis parvifolia |
| 2 | Leaf blades 6–12(–15) × 2.5–6(–12) cm, faces glabrous, pubescent, or scabrous; peduncles 9–25 cm; cypselae smooth | Heliopsis helianthoides |