Difference between revisions of "Packera macounii"

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'''Common name:''' Siskiyou Mountains ragwort.
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* Scientific Name''':''' ''Packera macounii''
 
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* Family: Asteraceae
'''Abbreviation Code (Codon):''' PAMA
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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
 
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----
 
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[[File:PACMAC1.jpg  |thumb|Photo by Rod Gilbert, 2008, also featured on Main Page]]
== '''''Packera macounii''''' ==
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[[category:user pages]]
 
[[category:user pages]]
  
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=== Taxonomy ===
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{{Taxobox
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| image =
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| image_caption =Photo by Rod Gilbert, 2008, also featured on Main Page
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| name =
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| regnum = [[Plant]]ae
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| subregnum = Viridiplantae
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| phylum = Tracheophyta
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| subphylum= Spermatophytina
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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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| synonyms = *''Senecio macounii'' Greene
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*''Senecio ligulifolius'' Greene
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}}
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<ref>Integrated Taxonomic Information System. Retrieved from https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=565364#null</ref>
  
"''Packera macounii'' is a species of flowering plant in the aster family known by the common name Siskiyou Montain 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.
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=== Description ===
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>
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Perennial herb, rising from fibrous roots or horizontal rhizomes, variable hairiness from nearly glabrous to wooly-hairy.
  
== Taxonomy ==
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Basal leaves thick, lanceolate stalked, 4-27 cm long including the stalk, sparcely
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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.
  
Packera macounii (Greene) W.A. Weber & Á. Löve
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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.  
  
'''Synonyms:''' Senecio ligulifolius Greene, Senecio macounii Greene
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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,
 
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B. et al. (2018). ''Flora of the Pacific Northwest: an illustrated manual''.
       
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Seattle: University of Washington Press.</ref>
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== Description ==
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=== General ===
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=== Distribution ===
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West Cascades, Victoria Island through Puget Trough and Willamette Valley to Southern Oregon.<ref name=":1" />
  
=== Leaves ===
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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>
=== Flowers & Bloom Period===
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[[File:PAMA.jpg|thumb|100px|left|Herbarium specimen of Siskiyou mountain ragweed from Jepson Herbarium]]
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=== Fruit ===
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=== Seed ===
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[[Image:Packera macounii.jpg|thumb|right|150px|Seeds of Siskiyou Mountain ragweed]]
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=== Habitat ===
Photo by Lisa Hintz
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Dry open forests, disturbed areas and rock outcrops or limestone quarries in the lowland zone<ref name=":0" />
  
== Distribution ==
 
 
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* United States:
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=== Uses ===
* Elsewhere:
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Provides nectar for pollinators.
  
== Habitat ==
 
 
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== Uses ==
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=== Propagation ===
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"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.
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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" />
  
== Propagation ==
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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==
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===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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<References/>
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<references />
 
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{{reflist|2}}
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== External Links ==
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[http://plants.usda.gov/java/nameSearch?keywordquery=Packera+macounii&mode=sciname&submit.x=18&submit.y=8 Siskiyou Mountain ragwort USDA Plants Database page]
 
[http://plants.usda.gov/java/nameSearch?keywordquery=Packera+macounii&mode=sciname&submit.x=18&submit.y=8 Siskiyou Mountain ragwort USDA Plants Database page]

Latest revision as of 23:18, 20 March 2021

  • Scientific 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

Photo by Rod Gilbert, 2008, also featured on Main Page

Taxonomy

Scientific classification
Kingdom: Plantae
Subkingdom: Viridiplantae
Phylum: Tracheophyta
Subphylum: Spermatophytina
Class: Magnoliopsida
Subclass: Asteranae
Order: Asterales
Family: Asteraceae
Genus: Packera Á. Löve & D. Löve
Species: Packera macounii (Greene) W.A. Weber & Á. Löve
Synonyms
  • Senecio macounii Greene
  • Senecio ligulifolius Greene

[1]

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. [2][3]


Distribution

West Cascades, Victoria Island through Puget Trough and Willamette Valley to Southern Oregon.[3]

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.[4]


Habitat

Dry open forests, disturbed areas and rock outcrops or limestone quarries in the lowland zone[2]


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.[4]

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.[4]


Photo Gallery


References

  1. Integrated Taxonomic Information System. Retrieved from https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=565364#null
  2. 2.0 2.1 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]
  3. 3.0 3.1 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.
  4. 4.0 4.1 4.2 Elliott, C. (2014, March 3). Retrieved from http://sustainabilityinprisons.org/blog/2014/03/03/the-great-unknowns/

Siskiyou Mountain ragwort USDA Plants Database page

Integrated Taxonomic Information System

Jepson Manual Treatment