Packera millelobata
(Uinta Ragwort, Uintah Groundsel)Taxonomy
- Kingdom: Plantae
- Plants
- Phylum: Tracheophyta
- Vascular Plants
- Class: Magnoliopsida
- Dicotyledons
- Order: Asterales
- Family: Noctuoidea
- Genus: Packera
(PAK-er-uh)
Á. Löve & D. Löve, Bot. Not. 128: 520. 1976. - Ragwort [For John G. Packer, b. 1929, Canadian botanist]
- Specific epithet: millelobata (Rydb.) W.A. Weber & A. Löve
- Botanical name: Packera millelobata (Rydb.) W.A. Weber & A. Löve
- Specific epithet: millelobata (Rydb.) W.A. Weber & A. Löve
- Genus: Packera
(PAK-er-uh)
Á. Löve & D. Löve, Bot. Not. 128: 520. 1976. - Ragwort [For John G. Packer, b. 1929, Canadian botanist]
- Family: Noctuoidea
- Order: Asterales
- Class: Magnoliopsida
- Dicotyledons
- Phylum: Tracheophyta
- Vascular Plants
Unambiguous Synonyms:
- Senecio memmingeri Britt.
- Senecio millefolium Torr. & Gray
Notes:
Name Status: Accepted Name. Latest taxonomic scrutiny: 15-Mar-2000
Physical Description
Genus Packera:
Annuals, biennials, or perennials, 3-100+ cm (rhizomatous or taprooted, often with relatively thin, branched fibrous roots). Stems single or clustered. Leaves basal and cauline (gradually or abruptly reduced distally) ; alternate; petiolate (mostly basal) or sessile; blades pinnately nerved, elliptic, lanceolate, linear, lyrate, orbiculate, ovate, reniform, or spatulate (and most intermediate shapes, blades often pinnately lobed to pinnatifid or pinnatisect), ultimate margins entire or crenate, dentate, or serrate to denticulate (callous denticles relatively few or 0). Heads radiate or discoid, borne singly or in compact or congested to open, corymbiform, cymiform, or subumbelliform arrays. Calyculi 0 or 1-5+ bractlets. Involucres campanulate to cylindric, 5-12 mm diam. Phyllaries persistent, usually 8, 13, or 21(-30+) in 1-2 series, erect (reflexed in fruit), distinct, (light to dark green, yellowish, reddish, or cyanic) linear to ensiform, equal to subequal (glabrous or hairy), margins usually ± scarious. Receptacles flat, foveolate, epaleate. Ray florets 0 or (1-) 5-13, pistillate, fertile; corollas pale yellow to orange-red (tubes 1-4 mm, laminae 4-16 mm). Disc florets 20-80+, bisexual, fertile; corollas pale yellow to deep orange-red, tubes shorter than to equaling campanulate throats, lobes 5, erect to recurved, usually ± deltate; style branches stigmatic in 2 lines, apices usually truncate-penicillate. Cypselae cylindric, usually 5-10-ribbed (ribs usually prominent), glabrous or hirtellous; pappi readily falling, of ± 60+, white, barbellulate bristles. x = 20, 22, 23.
Species 64: subtropical, temperate, and arctic regions of North America; 1(-2) species reported from Siberia.
Packera is a segregate of Senecio. It contains species that have traditionally been referred to as the "aureoid senecios," an informal group first recognized by Asa Gray. Base chromosome numbers of x = 22 or 23 and a suite of morphologic characters have been used in circumscription of Packera. Studies involving molecular data and palynological analysis lend additional support for recognition of the genus.Some species of Packera are abundant and widely distributed, thriving in disturbed habitats. Others are narrow endemics, restricted to specialized habitats, or isolated on mountain peaks. Some species from the latter group are listed as threatened or endangered; others are in need of further study to determine their conservation status.Species boundaries in Packera are imprecise. Some species hybridize to some extent with others whenever they come into contact; other species or species groups provide taxonomic problems that have yet to be resolved. Authors of relatively recent studies of the widespread P. streptanthifolia and P. paupercula propose dividing the species into varieties based on subtle differences in vegetative morphology and population-level differences in chromosome numbers. In this treatment, while recognizing the value of such work in elucidating evolutionary relationships, I do not discuss most of those proposed varieties. Some of the characteristics used to separate the varieties are overlapping or not readily discernible.Identification of a given specimen may be reached at multiple points within the key.[1]
Habit: Forb/herb
Distribution
Range and Population
North America
Reproduction
Duration: Perennial
Similar Species
Members of the genus Packera:
There are approximately 111 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them: P. Á.Löve · P. anonyma (Small's Ragwort) · P. antennariifolia (Cat's-Paw Ragwort) · P. aurea (Cankerwort) · P. bellidifolia · P. bernardina (San Bernardino Butterweed) · P. bolanderi (Bolander Ragwort) · P. bolanderi (Gray) W.A.Weber and A.Löve var. bolanderi (Gray) W.A.Weber (Bolander's Ragwort) · P. bolanderi (Gray) W.A.Weber & A.Löve var. harfordii (Greenm.) T.M.Barkl., co (Harford's Ragwort) · P. bolanderi var. bolanderi · P. bolanderi var. harfordii · P. breweri (Brewer Ragwort) · P. buekii · P. cana (Gray Ragwort) · P. candidissima · P. cardamine (Bitter-Cress Groundsel) · P. castoreus (Beaver Mountain Ragwort) · P. clevelandii (Cleveland Ragwort) · P. coahuilensis · P. contermina (Northwestern Groundsel) · P. crocata (Saffron Groundsel) · P. cymbalaria (Dwarf Arctic Groundsel) · P. cymbalarioides (Cleftleaf Groundsel) · P. cynthioides (White Mountain Groundsel) · P. debilis (Rocky Mountain Ragwort) · P. dimorphophylla (Greene) W.A.Weber & A.Löve var. intermedia (T.M.Barkl.) T.M.Ba (Splitleaf Groundsel) · P. dimorphophylla (Greene) W.A.Weber & A.Löve var. paysonii (T.M.Barkl.) T.M.Bark (Payson's Groundsel) · P. dimorphophylla dimorphophylla (Splitleaf Groundsel) · P. dimorphophylla var. intermedia · P. dimorphophylla var. paysonii · P. eurycephala (Siskiyou Groundsel) · P. eurycephala var. eurycephala · P. eurycephala var. lewisrosei · P. eurycephala var. lewisrosei comb. nov. ined (Lewis' Groundsel) · P. fendleri (Fendler Ragwort) · P. flettii (Flett Ragwort) · P. franciscana (San Francisco Peaks Groundsel) · P. ganderi (Gander Butterweed) · P. glabella (Butterweed) · P. greenei (Flame Butterweed) · P. hartiana (Hart Groundsel) · P. hesperia (Western Ragwort) · P. heterophylla · P. hintoniorum · P. hyperborealis (Boreal Groundsel) · P. indecora (Elegant Groundsel) · P. ionophylla (Tehachapi Ragwort) · P. layneae (Layne's Butterweed) · P. loratifolia · P. lyallii · P. macounii (Siskiyou Mountain Ragwort) · P. malmstenii (Podunk Ragwort) · P. millefolia (Blue Ridge Ragwort) · P. millelobata (Uinta Ragwort) · P. millelobatus · P. montereyana · P. moranii · P. moresbiensis · P. multilobata (Basin Butterweed) · P. musiniensis · P. neomexicana (New Mexico Groundsel) · P. neomexicana (Gray) W.A.Weber & A.Löve var. metcalfei (Greene) T.M.Barkl., c (Metcalf's Groundsel) · P. neomexicana (Gray) W.A.Weber and A.Löve var. mutabilis (Greene) W.A.Web (New Mexico Groundsel) · P. neomexicana (Gray) W.A.Weber and A.Löve var. neomexicana (Gray) W.A.Web (New Mexico Groundsel) · P. neomexicana (Gray) W.A.Weber & A.Löve var. toumeyi (Greene) T.M.Barkl., com (Toumey's Groundsel) · P. neomexicana var. metcalfei · P. neomexicana var. metcalfei comb. nov. ined. (Metcalf's Groundsel) · P. neomexicana var. mutabilis · P. neomexicana var. neomexicana · P. neomexicana var. toumeyi · P. neomexicana var. toumeyi comb. nov. ined. (Toumey's Groundsel) · P. newcombei · P. obovata (Golden Groundsel) · P. ogotorukensis (Ogotoruk Creek Groundsel) · P. ovina · P. pauciflora (Alpine Groundsel) · P. pauciflorus · P. paupercula (Balsam Groundsel) · P. plattensis (Prairie Groundsel) · P. porteri (Porter's Groundsel) · P. pseudaurea (Falsegold Groundsel) · P. pseudaurea (Rydb.) W.A.Weber and A.Löve var. flavula (Greene) W.A.Weber (Falsegold Groundsel) · P. pseudaurea (Rydb.) W.A.Weber & A.Löve var. semicordata (Mack. & Bush) T.M.Bark (Falsegold Groundsel) · P. pseudaurea var. flavula · P. pseudaurea var. pseudaurea (Falsegold Groundsel) · P. pseudaurea var. semicordata · P. pseudaurea var. semicordata comb. nov. ined. (Falsegold Groundsel) · P. pseudaureus · P. quaerens (Mogollon Mountain Ragwort) · P. quebradensis · P. quercetorum (Arizona Groundsel) · P. rosei · P. sanguisorbae · P. sanguisorboides (Burnet Groundsel) · P. scalaris · P. scalaris var. carmenensis · P. scalaris var. parrasiana · P. schweinitziana (New England Groundsel) · P. schweintiziana · P. spellenbergii (Carrizo Creek Ragwort)
Bibliography
- Bain, J. F. and J. Whitton. 1994. Taxonomic analysis of Senecio pauciflorus and S. indecorus (Asteraceae). Nordic J. Bot. 14: 193-199.
- Bain, J. F. and R. K. Jansen. 1995. A phylogenetic analysis of the aureoid Senecio (Asteraceae) complex based on ITS sequence data. Pl. Syst. Evol. 195: 209-219.
- Bain, J. F. and R. K. Jansen. 1996. Numerous chloroplast DNA polymorphisms are shared among different populations and species in the aureoid Senecio (Packera) complex. Canad. J. Bot. 74: 1719-1728.
- Bain, J. F., B. S. Tyson, and D. F. Bray. 1997. Variation in pollen wall ultrastructure in New World Senecioneae (Asteraceae), with special reference to Packera. Canad. J. Bot. 75: 730-735.
- Barkley, T. M. 1962. A revision of Senecio aureus L. and allied species. Trans. Kansas Acad. Sci. 65: 318-408.
- Barkley, T. M. 1968. Taxonomy of Senecio multilobatus and its allies. Brittonia 20: 267-284.
- Barkley, T. M. 1980. Taxonomic notes on Senecio tomentosus and its allies (Asteraceae). Brittonia 32: 291-308.
- Barkley, T. M. 1988. Variation among the aureoid senecios of North America: A geohistorical interpretation. Bot. Rev. (Lancaster) 54: 82-106.
- Kowal, R. R. 1975. Systematics of Senecio aureus and allied species on the Gaspé Peninsula, Quebec. Mem. Torrey Bot. Club 23: 1-113.
- Packer, J. G. 1972. A taxonomic and phytogeographical review of some arctic and alpine Senecio species. Canad. J. Bot. 50: 507-518.
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Notes
Contributors:
- Bisby FA, Roskov YR, Orrell TM, Nicolson D, Paglinawan LE, Bailly N, Kirk PM, Bourgoin T, van Hertum J, eds (2008). Species 2000 & ITIS Catalogue of Life: 2008 Annual Checklist Taxonomic Classification. CD-ROM; Species 2000: Reading, U.K.
- Global Biodiversity Information Facility. Accessed February 02, 2008. http://www.gbif.org Mediated distribution data from 5 providers.
Data Sources:
Accessed through GBIF Data Portal February 02, 2008:
- Missouri Botanical Garden, Missouri Botanical Garden
- UNIBIO, IBUNAM, Asteraceae
- USDA PLANTS, USDA PLANTS Database
Identifiers:
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 565367
- Global Biodiversity Information Facility Taxonkey: 13735805
- Globally Unique Identifier: urn:lsid:ipni.org:names:909330-1
- Natural Heritage Network Species Identifier: PDAST8H230
- U.S.D.A. Plant Symbol: PAMI26
- Zipcode Zoo Species Identifier: 53016
Footnotes:
- Debra K. Trock "Packera". in Flora of North America Vol. 20 Page 541,542, 543, 545, 548, 570, 580, 582, 584,. Oxford University Press. Online at EFloras.org.
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