Difference between revisions of "Packera paupercula"
Bot. Not. 128: 520. 1976.
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|name=Senecio pauperculus | |name=Senecio pauperculus | ||
|authority=Michaux | |authority=Michaux | ||
| + | |rank=species | ||
|publication_title=Fl. Bor.-Amer. | |publication_title=Fl. Bor.-Amer. | ||
|publication_place=2: 120. 1803 | |publication_place=2: 120. 1803 | ||
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|name=Senecio balsamitae | |name=Senecio balsamitae | ||
|authority=Muhlenberg ex Willdenow | |authority=Muhlenberg ex Willdenow | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio balsamitae var. firmifolius | |name=Senecio balsamitae var. firmifolius | ||
|authority=Greenman | |authority=Greenman | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio balsamitae var. thomsoniensis | |name=Senecio balsamitae var. thomsoniensis | ||
|authority=Greenman | |authority=Greenman | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio crawfordii | |name=Senecio crawfordii | ||
|authority=Greenman | |authority=Greenman | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio flavovirens | |name=Senecio flavovirens | ||
|authority=Greenman | |authority=Greenman | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio gaspensis | |name=Senecio gaspensis | ||
|authority=Oakes ex Rusby | |authority=Oakes ex Rusby | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio multnomensis | |name=Senecio multnomensis | ||
|authority=Rydberg | |authority=Rydberg | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio robbinsii var. subtomentosus | |name=Senecio robbinsii var. subtomentosus | ||
|authority=Peck | |authority=Peck | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Senecio tweedyi | |name=Senecio tweedyi | ||
| − | |authority= | + | |authority= |
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera paupercula | |hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera paupercula | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Packera paupercula | name=Packera paupercula | ||
| − | |||
|authority=(Michaux) Á. Löve & D. Löve | |authority=(Michaux) Á. Löve & D. Löve | ||
|rank=species | |rank=species | ||
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|publication year=1976 | |publication year=1976 | ||
|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_1332.xml |
|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Packera | |genus=Packera | ||
Revision as of 19:25, 16 December 2019
Perennials, 20–45+ cm; subrhizomatous (bases weakly branched, ascending to erect). Stems 1 or 2–4, loosely clustered, glabrous or sparsely tomentose proximally. Basal leaves petiolate; blades lanceolate to narrowly elliptic or oblanceolate, 30–60+ × 10–20+ mm, bases tapering, sometimes obtuse, margins subentire to dentate or serrate. Cauline leaves gradually reduced (proximals petiolate, sublyrate; mids sessile, not clasping, lanceolate, dissected, incised, or lacerate; distals sessile, bractlike). Heads 2–10+ in loose or compact, corymbiform arrays. Peduncles usually bracteate, sometimes ebracteate, glabrous. Calyculi inconspicuous. Phyllaries 13 or 21, green, 5–8+ mm, glabrous. Ray florets 0, 8, or 13; corolla laminae (pale yellow) 5–10+ mm. Disc florets 50–65+; corolla tubes 2–3 mm, limbs 2–3 mm. Cypselae 1–2 mm, usually glabrous, sometimes hispidulous on ribs; pappi 3.5–4.5 mm. 2n = 44, 46, 92.
Phenology: Flowering May–late Jun (south), late Jun–early Aug (north).
Habitat: Wet meadows, open woodlands, along streams, rocky outcrops
Elevation: 0–3000 m
Distribution
Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Ala., Alaska, Colo., D.C., Ga., Idaho, Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mont., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., S.Dak., Tenn., Utah, Vt., Wash., W.Va., Wis., Wyo.
Discussion
Ecologically and morphologically, Packera paupercula is the most variable species of the genus in North America. Some “phases” have been treated as separate species, subspecies, varieties, forms, and races. Variation within P. paupercula hints at some interesting evolutionary relationships; characteristics used to separate taxa overlap. Much of the morphologic variation in this species may be due to hybridization and introgression. I do not recognize any of the infraspecific taxa that have been proposed.
Selected References
None.