Difference between revisions of "Pentachaeta exilis"
Proc. Amer. Acad. Arts 8: 633. 1873.
FNA>Volume Importer |
imported>Volume Importer |
||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 8: | Line 8: | ||
}} | }} | ||
|common_names=Meager pentachaeta | |common_names=Meager pentachaeta | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Aphantochaeta exilis | |name=Aphantochaeta exilis | ||
|authority=A. Gray | |authority=A. Gray | ||
| + | |rank=species | ||
|publication_title=in War Department [U.S.], Pacif. Railr. Rep. | |publication_title=in War Department [U.S.], Pacif. Railr. Rep. | ||
|publication_place=4(5): 100, plate 11[as 10]A. 1857 | |publication_place=4(5): 100, plate 11[as 10]A. 1857 | ||
| Line 17: | Line 22: | ||
|name=Chaetopappa exilis | |name=Chaetopappa exilis | ||
|authority=(A. Gray) D. D. Keck | |authority=(A. Gray) D. D. Keck | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Pentachaeta;Pentachaeta exilis | |hierarchy=Asteraceae;Asteraceae tribe Astereae;Pentachaeta;Pentachaeta exilis | ||
| Line 53: | Line 59: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Pentachaeta exilis | name=Pentachaeta exilis | ||
| − | |||
|authority=(A. Gray) A. Gray | |authority=(A. Gray) A. Gray | ||
|rank=species | |rank=species | ||
| Line 64: | Line 69: | ||
|publication title=Proc. Amer. Acad. Arts | |publication title=Proc. Amer. Acad. Arts | ||
|publication year=1873 | |publication year=1873 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_64.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Pentachaeta | |genus=Pentachaeta | ||
Latest revision as of 20:04, 5 November 2020
Plants 2–6 cm. Stems simple or branched, rarely with many branches from bases. Leaf blades linear to filiform, 12–32 × 0.5–1 mm. Involucres turbinate to campanulate. Phyllaries in 2(–3) series, elliptic to obovate, glabrous or sparsely and minutely glandular. Ray (or pistillate) florets 0 or 1–5; corollas white, laminae 0.8–2 mm, or 0, or apiculum 0.1–0.5(–1) mm. Disc florets 3–6(–15); corollas yellowish to reddish, club-shaped, widened through limbs, abruptly contracted at lobes, lobes 5, (lobes and sometimes distalmost portion of limbs) yellow or purplish red at maturity, style branches (0.7–)1–2 mm, stigmatic portions 0.4–0.5 mm. Pappi 0, or of (3–)5 bristles, not dilated at bases. 2n = 18.
Discussion
Subspecies 2 (2 in the flora).
Plants of Pentachaeta exilis with greatly reduced or completely absent pappi apparently are scattered over the range of the species. This feature is relatively constant within a population.
Selected References
None.
Key
| 1 | Ray (pistillate) corollas elaminate or with apiculum 0.1–0.5(–1) mm; disc florets 3–6(–15), corolla lobes red-purple, style branches (0.7–)1–2 mm, stigmatic portions 0.4–0.5 mm | Pentachaeta exilis subsp. exilis |
| 1 | Ray (pistillate) corollas laminate, laminae 0.8–2 mm; disc florets (7–)15–34, corolla lobes yellow, style branches 2–3 mm, stigmatic portions 0.6–1mm | Pentachaeta exilis subsp. aeolica |