Difference between revisions of "Packera macounii"

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== '''''Packera macounii''''' ==
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* Latin Name''':''' ''Packera macounii''
 
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* Family: Asteraceae
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* Common name''':''' Puget butterweed, long rayed groundsel, Macoun's groundsel, Siskiyou Mountain ragwort
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* Synonyms/Misapplications: ''Senecio'' ''macounii, Senecio ligulifolius''
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* Codon''':''' PACMAC
 
[[category:user pages]]
 
[[category:user pages]]
 
 
"''Packera macounii'' is a species of flowering plant in the aster family known by the common name Siskiyou Mountains ragwort. It is native to the west coast of North America from British Columbia to far northern California, where it grows in chaparral and mountain forests, often on serpentine soils.
 
It is a perennial herb producing a single erect stem up to 40 or 50 centimeters in maximum height from a taproot and branching caudex unit. It is slightly hairy to quite woolly in texture. The leaves have lance-shaped blades several centimeters long which are borne on long petioles. The inflorescence holds several flower heads containing many disc florets and usually either 8 or 13 yellow ray florets each about a centimeter long." <ref name="Wikipedia">Wikipedia Foundation</ref>
 
  
 
== Taxonomy ==
 
== Taxonomy ==
  
Packera macounii (Greene) W.A. Weber & Á. Löve
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{{Taxobox
 
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| image =PACMAC1.jpg
Synonyms:
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| image_caption =Photo by Rod Gilbert, 2008, also featured on Main Page
        SELI8 Senecio ligulifolius Greene
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| name = '''''Packera macounii'''''
SEMA Senecio macounii Greene
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| regnum = [[Plant]]ae
 
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| subregnum = Tracheobionta
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| phylum = Spermatophyta
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| subphylum= Magnoliophyta
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| classis = Magnoliopsida
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| subclassis = Asteranae
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| ordo = Asterales
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| familia = Asteraceae
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| genus = '''''Packera''''' Á. Löve & D. Löve
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| species = '''''Packera macounii''''' (Greene) W.A. Weber & Á. Löve
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}}
 
== Description ==
 
== Description ==
----
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Perennial herb, rising from fibrous roots or horizontal rhizomes, variable hairiness from nearly glabrous to wooly-hairy.
=== General ===
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=== Leaves ===
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Basal leaves thick, lanceolate stalked, 4-27 cm long including the stalk, sparcely
=== Flowers & Bloom Period===
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white-woolly when young becoming hairless by flowering time, variable margins- from entire to coarsely toothed. Cauline leaves similar, from lanceolate to linear, reduced upwards, becoming sessile up the stalk. Tomentum more dense on lower leaf surfaces.
  
[[File:PAMA.jpg|thumb|100px|left|Herbarium specimen of Siskiyou mountain ragweed from Jepson Herbarium]]
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Capitate inflorescences in flat-topped arrays. Involucral bracts lanceolate, with translucent margins, hairy at the tips. Ray and disk flowers yellow.  
  
=== Fruit ===
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Fruit is an achene. <ref name=":0">Klinkenberg, Brian. (Editor) 2020. ''E-Flora BC: Electronic Atlas of the Plants of British Columbia'' [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2020-06-03 10:54:09 AM]</ref><ref name=":1">Hitchcock, C. L., Cronquist, A., Giblin, D., & Legler,
=== Seed ===
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B. et al. (2018). ''Flora of the Pacific Northwest: an illustrated manual''.
 +
Seattle: University of Washington Press.</ref>
 
----
 
----
 +
== Distribution ==
 +
West Cascades, Victoria Island through Puget Trough and Willamette Valley to Southern Oregon.<ref name=":1" />
  
[[Image:Packera macounii.jpg|thumb|right|150px|Seeds of Siskiyou Mountain ragweed]]
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This plant is listed with the State of Washington as critically imperiled due to the reduction in native prairie acreage. Though it was once found in a wider range, the only known remaining population in south Puget lowland prairies is on Joint Base Lewis-McChord.<ref name=":2">Elliott, C. (2014, March 3). Retrieved from <nowiki>http://sustainabilityinprisons.org/blog/2014/03/03/the-great-unknowns/</nowiki></ref>
Photo by Lisa Hintz
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== Distribution ==
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----
 
----
  
* United States:
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== Habitat ==
* Elsewhere:
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Dry open forests, disturbed areas and rock outcrops or limestone quarries in the lowland zone<ref name=":0" />
  
== Habitat ==
 
 
----
 
----
  
 
== Uses ==
 
== Uses ==
 +
Provides nectar for pollinators.
 +
 
----
 
----
  
 
== Propagation ==
 
== Propagation ==
 +
"Packera macounii grows in a manner common to many perennials from the aster plant family on the West Coast of the United States. Many bloom in late spring to early summer and ripen seed in the hottest, driest part of the year. Summer rain is uncommon in most lowland areas of western North America, and plants must develop adaptations to set seed under dry conditions. The leaves can persist and provide nutrients to the developing seed by being small, linear and covered with grey hairs: this reduces water loss and overheating during the summer. Often the seed is quite small and ripens quickly after pollination further reducing the plant’s need for moisture.
 +
Packera grows in sites where there is little competition from other vegetation. The seed is adapted to germinate in open conditions, requiring a broad spectrum of light to germinate. In the nursery, the seed is sown on the surface of the soil. Fresh seed needs no stratification."- From the draft protocol for ''P. macounii'', Sustainability in Prisons.<ref name=":2" />
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 +
== Seeds ==
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Measurement Range: L: 4-6 mm W: 0.5-1 mm D: 0.5-0.7 mm.
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Surface: elongate with longitudinal grooves, colored black and tan, short pappus hairs.<ref name=":2" />
 
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==Photo Gallery==
 
==Photo Gallery==
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<gallery>
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File:PACMAC2.jpg|Photo by Rod Gilbert, 2005
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File:Packera macounii.jpg| P. macounii seeds, photos by Lisa Hintz
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</gallery>
 
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<References/>
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<references />
 
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{{reflist|2}}
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== External Links ==
 
== External Links ==

Latest revision as of 16:00, 4 June 2020

  • Latin Name: Packera macounii
  • Family: Asteraceae
  • Common name: Puget butterweed, long rayed groundsel, Macoun's groundsel, Siskiyou Mountain ragwort
  • Synonyms/Misapplications: Senecio macounii, Senecio ligulifolius
  • Codon: PACMAC

Taxonomy

Packera macounii
Photo by Rod Gilbert, 2008, also featured on Main Page
Scientific classification
Kingdom: Plantae
Subkingdom: Tracheobionta
Phylum: Spermatophyta
Subphylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteranae
Order: Asterales
Family: Asteraceae
Genus: Packera Á. Löve & D. Löve
Species: Packera macounii (Greene) W.A. Weber & Á. Löve

Description

Perennial herb, rising from fibrous roots or horizontal rhizomes, variable hairiness from nearly glabrous to wooly-hairy.

Basal leaves thick, lanceolate stalked, 4-27 cm long including the stalk, sparcely white-woolly when young becoming hairless by flowering time, variable margins- from entire to coarsely toothed. Cauline leaves similar, from lanceolate to linear, reduced upwards, becoming sessile up the stalk. Tomentum more dense on lower leaf surfaces.

Capitate inflorescences in flat-topped arrays. Involucral bracts lanceolate, with translucent margins, hairy at the tips. Ray and disk flowers yellow.

Fruit is an achene. [1][2]


Distribution

West Cascades, Victoria Island through Puget Trough and Willamette Valley to Southern Oregon.[2]

This plant is listed with the State of Washington as critically imperiled due to the reduction in native prairie acreage. Though it was once found in a wider range, the only known remaining population in south Puget lowland prairies is on Joint Base Lewis-McChord.[3]


Habitat

Dry open forests, disturbed areas and rock outcrops or limestone quarries in the lowland zone[1]


Uses

Provides nectar for pollinators.


Propagation

"Packera macounii grows in a manner common to many perennials from the aster plant family on the West Coast of the United States. Many bloom in late spring to early summer and ripen seed in the hottest, driest part of the year. Summer rain is uncommon in most lowland areas of western North America, and plants must develop adaptations to set seed under dry conditions. The leaves can persist and provide nutrients to the developing seed by being small, linear and covered with grey hairs: this reduces water loss and overheating during the summer. Often the seed is quite small and ripens quickly after pollination further reducing the plant’s need for moisture. Packera grows in sites where there is little competition from other vegetation. The seed is adapted to germinate in open conditions, requiring a broad spectrum of light to germinate. In the nursery, the seed is sown on the surface of the soil. Fresh seed needs no stratification."- From the draft protocol for P. macounii, Sustainability in Prisons.[3]

Seeds

Measurement Range: L: 4-6 mm W: 0.5-1 mm D: 0.5-0.7 mm. Surface: elongate with longitudinal grooves, colored black and tan, short pappus hairs.[3]


Photo Gallery


References


  1. 1.0 1.1 Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2020-06-03 10:54:09 AM]
  2. 2.0 2.1 Hitchcock, C. L., Cronquist, A., Giblin, D., & Legler, B. et al. (2018). Flora of the Pacific Northwest: an illustrated manual. Seattle: University of Washington Press.
  3. 3.0 3.1 3.2 Elliott, C. (2014, March 3). Retrieved from http://sustainabilityinprisons.org/blog/2014/03/03/the-great-unknowns/

External Links


Siskiyou Mountain ragwort USDA Plants Database page

Integrated Taxonomic Information System

Jepson Manual Treatment