Difference between revisions of "Senecio flaccidus"
Linnaea 5: 161. 1830.
FNA>Volume Importer |
FNA>Volume Importer |
||
| Line 52: | Line 52: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Senecio flaccidus | name=Senecio flaccidus | ||
| − | |||
|authority=Lessing | |authority=Lessing | ||
|rank=species | |rank=species | ||
| Line 64: | Line 63: | ||
|publication year=1830 | |publication year=1830 | ||
|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/V20_1238.xml |
|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Senecio | |genus=Senecio | ||
Revision as of 19:25, 16 December 2019
Subshrubs or shrubs, (30–)40–120+ cm (taproots forming woody crowns). Herbage glabrous or ± lanate-tomentose. Stems usually multiple (little branched, arching-erect). Leaves ± evenly distributed; sessile or obscurely petiolate; blades narrowly linear to filiform (or pinnatifid, the segments linear to filiform), 3–10(–12) cm, bases ± linear, ultimate margins entire or remotely toothed (fascicles of smaller leaves sometimes borne in axils of larger leaves). Heads (1–)3–10(–20+) in corymbiform or subcorymbiform clusters, often gathered in larger, showy arrays (involucres campanulate or cylindric). Calyculi usually of 3–5+ bractlets (lengths often to 1/2+ phyllaries), sometimes 0. Phyllaries ± 13 or ± 21+, 5–10(–12) mm, tips green or minutely black. Ray florets usually ± 8 or ± 13, sometimes ± 21; corolla laminae 10–15(–20) mm (mostly yellow, sometimes ochroleucous). Cypselae hairy. 2n = 40.
Distribution
w United States, Mexico.
Discussion
Varieties 3 (3 in the flora).
The varieties of Senecio flaccidus are distinguished by morphologic tendencies and geography. The species occurs southward to central Mexico; a sound understanding of the infraspecific taxonomy must await revisionary studies that include the Mexican plants.
Selected References
None.
Lower Taxa
Key
| 1 | Herbage usually tomentose (hairs whitish), sometimes unevenly glabrescent; bractlets of calyculi minute or 0; involucres cylindric or ± campanulate; phyllaries ± 13 or ± 21, 5–8+ mm | Senecio flaccidus var. flaccidus |
| 1 | Herbage ± tomentose, glabrate, or glabrous; bractlets of calyculi well developed (lengths mostly 1/3 – 1/2 phyllaries); involucres ± campanulate; phyllaries ± 21, 7–12 mm | > 2 |
| 2 | Plants usually ± tomentose (usually with persistent, uneven grayish tomentum), sometimes unevenly glabrescent; California w of crests of Sierra Nevada and related ranges | Senecio flaccidus var. douglasii |
| 2 | Plants glabrate or glabrous; California deserts e of crest of Sierra Nevada and eastward | Senecio flaccidus var. monoensis |