Difference between revisions of "Thymophylla pentachaeta"
Fl. S.E. U.S., 1295, 1341. 1903.
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|name=Hymenatherum pentachaetum | |name=Hymenatherum pentachaetum | ||
|authority=de Candolle | |authority=de Candolle | ||
| + | |rank=species | ||
|publication_title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. | |publication_title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. | ||
|publication_place=5: 642. 1836 | |publication_place=5: 642. 1836 | ||
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|name=Dyssodia pentachaeta | |name=Dyssodia pentachaeta | ||
|authority=(de Candolle) B. L. Robinson | |authority=(de Candolle) B. L. Robinson | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Pectidinae;Thymophylla;Thymophylla pentachaeta | |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Pectidinae;Thymophylla;Thymophylla pentachaeta | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Thymophylla pentachaeta | name=Thymophylla pentachaeta | ||
| − | |||
|authority=(de Candolle) Small | |authority=(de Candolle) Small | ||
|rank=species | |rank=species | ||
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|family=Asteraceae | |family=Asteraceae | ||
|illustrator=Barbara Alongi | |illustrator=Barbara Alongi | ||
| + | |illustration copyright=Flora of North America Association | ||
|distribution=sw United States;Mexico;introduced(?) in South America (Argentina). | |distribution=sw United States;Mexico;introduced(?) in South America (Argentina). | ||
|reference=None | |reference=None | ||
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|publication year=1903 | |publication year=1903 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V21_592.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae | ||
Revision as of 19:37, 16 December 2019
Perennials or subshrubs, ± grayish to green, to 15(–25) cm, usually puberulent to canescent, sometimes glabrescent or glabrous. Stems erect or spreading. Leaves mostly opposite; blades mostly pinnately lobed, 6–28+ mm overall, lobes 3–11 linear to filiform (usually stiff, setiform). Peduncles 20–100 mm, puberulent or glabrous. Calyculi 0, or of 1–5 deltate bractlets, lengths less than 1/2 phyllaries. Involucres obconic to campanulate or hemispheric, 4–6 mm. Phyllaries 12–21, margins of outer distinct 1/5 to nearly all their lengths, abaxial faces puberulent or glabrous. Ray florets (8–)12–21; corollas yellow to orange-yellow, laminae 2–6(–8) × 1–3 mm. Disc florets 16–40 or 50–80; corollas yellow, 2–4 mm (tending to zygomorphy in peripheral florets in some plants). Cypselae 2–3 mm; pappi of 10 erose and/or aristate scales mostly 1–3 mm.
Distribution
sw United States, Mexico, introduced(?) in South America (Argentina).
Discussion
Varieties 4 (4 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Involucres cylindric, 2–3.5 mm diam.; disc florets 16–40 | Thymophylla pentachaeta var. hartwegii |
| 1 | Involucres obconic, campanulate, or hemispheric, mostly 4–5 mm diam.; disc florets 50–80 | > 2 |
| 2 | Peduncles 20–50 mm; margins of outer phyllaries distinct almost to bases | Thymophylla pentachaeta var. belenidium |
| 2 | Peduncles (40–)50–100 mm; margins of outer phyllaries distinct less ca. 1/2 or ca. 1/3 their lengths | > 3 |
| 3 | Leaf lobes mostly 9–11; phyllaries usually glabrous or glabrescent, rarely hairy | Thymophylla pentachaeta var. pentachaeta |
| 3 | Leaf lobes mostly 5–7(–10); phyllaries densely puberulent | Thymophylla pentachaeta var. puberula |