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Chaenactis douglasii (Hook. ) Hook. &. Arn.
DOUGLAS DUSTYMAIDEN
Life   Plantae   Dicotyledoneae   Asteraceae   Chaenactis

Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii

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Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii
Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii

Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii
Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii

Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii
Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii

Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii
Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii

Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii
Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii

Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii
Chaenactis douglasii
© Copyright Mel Harte 2010 · 3
Chaenactis douglasii

Associates · map
FamilyScientific name @ source (records)
Apidae  Anthophora bomboides @ BBSL (1)

Eucera actuosa @ BBSL (1)
Halictidae  Agapostemon angelicus @ BBSL (1)

Agapostemon virescens @ BBSL (1)

Halictus ligatus @ BBSL (1)
Megachilidae  Anthidium emarginatum @ RMBL_ENT (2)

Ashmeadiella breviceps @ BBSL (1)

Megachile melanophaea @ RMBL_ENT (1)

Megachile perihirta @ BBSL (3)

Megachile pugnata @ BBSL (1)

Osmia montana @ RMBL_ENT (1)

Osmia nemoris @ BBSL (4)

Osmia subaustralis @ BBSL (1)

Osmia trevoris @ BBSL (1)
Miridae  Aoplonema @ AMNH_PBI (1)

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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=CHDO ---> https://plants.usda.gov/java/profile?symbol=CHDO
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://plants.usda.gov/java/profile?symbol=CHDO

Following modified from Flora of North America
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Link to Flora of North America home
 
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FNA Vol. 21 Page 403, 404, 405 , 406 , 407 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 21 | Asteraceae | Chaenactis

6. Chaenactis douglasii (Hooker) Hooker & Arnott, Bot. Beechey Voy. 354. 1839.

Hoary pincushion, Douglas's dustymaiden

Hymenopappus douglasii Hooker, Fl. Bor.-Amer. 1: 316. 1833; Macrocarphus douglasii (Hooker) Nuttall

Biennials or perennials, (2—)5—50(—60) cm (rarely slightly woody or flowering first year, sometimes cespitose or ± matted); proximal indument thinning with age, grayish, mostly arachnoid-sericeous to thinly lanuginose. Stems 1—25+, erect to spreading. Leaves basal, or basal (sometimes withering) and ± cauline, (1—)2—12(—15) cm; largest blades ± elliptic or slightly lanceolate to ovate, ± 3-dimensional, usually 2-pinnately lobed; primary lobes (4—)5—9(—12) pairs, ± congested, scarcely imbricate, ultimate lobes ± involute and/or twisted. Heads 1—25+ per stem. Peduncles mostly ascending to erect, 1—10 cm. Involucres obconic to ± hemispheric. Phyllaries: longest 9—15(—17) mm; outer usually stipitate-glandular (sometimes sparsely or obscurely, rarely eglandular) and, often, arachnoid to lanuginose and, sometimes, sparsely villous, apices usually ± squarrose, pliant. Corollas 5—8 mm. Cypselae 5—8 mm (usually sparsely glandular amidst other indument); pappi: longest scales 3—6 mm.

Varieties 2 (2 in the flora): North America.

Chaenactis douglasii is widespread and variable (see discussion under var. douglasii ).

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Chaenactis+douglasii+var.+alpina&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Chaenactis+douglasii+var.+alpina&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Chaenactis+douglasii+var.+douglasii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Chaenactis+douglasii+var.+douglasii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Chaenactis+douglasii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Chaenactis+douglasii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Chaenactis+douglasii&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Updated: 2017-11-20 23:44:37 gmt
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