Difference between revisions of "Schkuhria"
Catal. Bot. 1: 116. 1797.
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--><p>According to B. G. Baldwin et al. (2002), among others, <i>Schkuhria</i> is closely related to Achyropappus Kunth and to <i>Bahia</i>.</p> | --><p>According to B. G. Baldwin et al. (2002), among others, <i>Schkuhria</i> is closely related to Achyropappus Kunth and to <i>Bahia</i>.</p> | ||
|tables= | |tables= | ||
| − | |references= | + | |references={{Treatment/Reference |
| + | |id=heiser1945a | ||
| + | |text=Heiser, C. B. 1945. A revision of the genus Schkuhria. Ann. Missouri Bot. Gard. 32: 265–278. | ||
| + | }} | ||
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|illustration copyright=Flora of North America Association | |illustration copyright=Flora of North America Association | ||
|distribution=sw United States;Mexico;Central America;South America. | |distribution=sw United States;Mexico;Central America;South America. | ||
| − | |reference= | + | |reference=heiser1945a |
|publication title=Catal. Bot. | |publication title=Catal. Bot. | ||
|publication year=1797 | |publication year=1797 | ||
|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_959.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae | ||
Latest revision as of 20:15, 5 November 2020
Annuals, 5–50+ cm. Stems erect, simple or branched (usually distally). Leaves mostly cauline; mostly opposite (distal sometimes alternate); petiolate or sessile; blades linear to filiform or 1–2-pinnately lobed (lobes 3–7+, linear to filiform), ultimate margins entire, faces sparsely hairy (hairs bulbous, conic, or fusiform, 0.1–0.3 mm), glabrescent, usually gland-dotted. Heads radiate or discoid, usually in loose, corymbiform to paniculiform arrays. Involucres obconic-obpyramidal to ± turbinate or hemispheric, 3–6 mm diam. (subtended by 0–3 bractlets). Phyllaries persistent, 4–6+ in 1–2 series (spreading or reflexed in fruit, distinct, obovate to oblanceolate, subequal, thin-herbaceous to membranous, margins membranous, often purplish or yellowish). Receptacles convex, pitted, epaleate. Ray florets 0 or 1–2, pistillate, fertile; corollas yellow or white. Disc florets 2–8(–30+), bisexual, fertile; corollas yellow to yellowish, sometimes red-tipped (± stipitate-glandular), tubes shorter than or about equaling campanulate to funnelform throats, lobes 5, deltate. Cypselae narrowly obpyramidal, 4-angled, finely nerved, ± hirsutulous to villous (at least at bases and/or on angles); pappi persistent, of 8+ spatulate to lanceolate (basally and/or medially thickened, distally and/or laterally scarious) scales (all, some, none, or the alternate ones ± aristate). x = 11.
Distribution
sw United States, Mexico, Central America, South America.
Discussion
Species 2 or perhaps more (2 in the flora).
According to B. G. Baldwin et al. (2002), among others, Schkuhria is closely related to Achyropappus Kunth and to Bahia.
Selected References
Lower Taxa
Key
| 1 | Phyllaries ± hirsutulous and gland-dotted; ray florets 0; disc florets 15–30 | Schkuhria multiflora |
| 1 | Phyllaries gland-dotted, otherwise usually glabrous; ray florets usually 1–2, sometimes 0; disc florets 2–6(–8+) | Schkuhria pinnata |