Difference between revisions of "Psathyrotopsis"
in N. L. Britton et al., N. Amer. Fl. 34: 360. 1927.
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|accepted_name=Psathyrotopsis | |accepted_name=Psathyrotopsis | ||
| − | |accepted_authority=Rydberg | + | |accepted_authority=Rydberg |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in N. L. Britton et al., N. Amer. Fl. | |title=in N. L. Britton et al., N. Amer. Fl. | ||
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name=Psathyrotopsis | name=Psathyrotopsis | ||
|author=John L. Strother | |author=John L. Strother | ||
| − | |authority=Rydberg | + | |authority=Rydberg |
|rank=genus | |rank=genus | ||
|parent rank=subtribe | |parent rank=subtribe | ||
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|publication year=1927 | |publication year=1927 | ||
|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_957.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 21:15, 5 November 2020
Perennials, 8–40 cm (sometimes functionally annual; caudices often ± woody). Stems 1–3+ (scapiform), erect, branched from bases or throughout. Leaves mostly basal; alternate; petiolate; blades rounded-deltate, lanceolate, or rhombic, margins crenate, serrate, or subentire, faces ± tomentose and stipitate-glandular. Heads discoid, borne singly or in corymbiform arrays. Involucres campanulate to hemispheric, 4–6(–10) mm diam. Phyllaries persistent, 8–21 in 2–3 series (lanceolate to linear, subequal, sparsely tomentulose and stipitate-glandular). Receptacles flat, obscurely pitted or knobby, epaleate. Ray florets 0. Disc florets 16–50, bisexual, fertile; corollas ochroleucous to bright yellow, (cylindro-funnelform) tubes much shorter than throats, lobes 5, (erect or spreading) deltate (style-branch appendages subulate to conic, shaggy-papillate). Cypselae narrowly obconic; pappi persistent, of 70–90 unequal bristles in 2–3 series. x = 19.
Distribution
sw United States, Mexico.
Discussion
Species 3 (1 in the flora).