Difference between revisions of "Sclerocarpus"
Icon. Pl. Rar. 1: 17, plate 176. 1781.
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|discussion=<p>Species ca. 12 (1 in the flora).</p> | |discussion=<p>Species ca. 12 (1 in the flora).</p> | ||
|tables= | |tables= | ||
| − | |references= | + | |references={{Treatment/Reference |
| + | |id=feddema1966a | ||
| + | |text=Feddema, C. 1966. Systematic Studies in the Genus Sclerocarpus and the Genus Aldama (Compositae). Ph.D. dissertation. University of Michigan. | ||
| + | }} | ||
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|illustration copyright=Flora of North America Association | |illustration copyright=Flora of North America Association | ||
|distribution=s United States;Mexico;Central America;one species in Old World tropics. | |distribution=s United States;Mexico;Central America;one species in Old World tropics. | ||
| − | |reference= | + | |reference=feddema1966a |
|publication title=Icon. Pl. Rar. | |publication title=Icon. Pl. Rar. | ||
|publication year=1781 | |publication year=1781 | ||
|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_333.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | ||
Latest revision as of 20:11, 5 November 2020
Annuals [perennials or subshrubs], 60–200 cm. Stems sprawling to erect, branched from bases or ± throughout. Leaves mostly cauline; opposite (proximal) or alternate; petiolate [sessile]; blades 3-nerved, ovate to rhombic or lanceolate, bases cuneate to rounded, margins coarsely toothed, faces glabrous or ± scabrous. Heads radiate, borne singly. Involucres rotate to hemispheric, 12–20 mm diam. Phyllaries persistent, 5–8[–21] in 1(–2) series (green, oblong to linear). Receptacles low-conic, paleate (paleae each closely investing subtended floret, each forming a hard perigynium around a fruit and shed with it). Ray florets 5–8, neuter; corollas (readily falling) yellow to orange. Disc florets 10–50, bisexual, fertile; corollas usually yellow to orange, sometimes with purple, tubes much shorter than cylindric throats, lobes 5, lance-linear. Cypselae (within perigynia) weakly compressed, obliquely obovoid or arcuate (glabrous); pappi 0, or coroniform (of distinct or connate scales or bristles). x = 12.
Distribution
s United States, Mexico, Central America, one species in Old World tropics.
Discussion
Species ca. 12 (1 in the flora).