Psilocarphus elatior (Gray) Gray
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TAXONOMY
 
Family: Asteraceae or Compositae
Genus: Psilocarphus
 
Species Synonyms: none
Common Names: woolly heads
meadow woolly heads
 
DISTRIBUTION
 
Canada: southwestern British Columbia, southeastern Alberta – southwestern Saskatchewan
Saskatchewan: southwestern Saskatchewan
Ecoregion: Mixed Grassland
 
HABITAT
 
Saskatchewan: dry slough bottoms
Associated Species: common pygmyweed, mudwort, navarrettia, needle spikerush, popcorn flower, prairie sage, second rockcress, spike primrose, western wheat grass, willow dock
 
RARITY STATUS
 
Provincial Status According
to Harms (2003):
Endangered
Nature Conservancy Status:
G4Q N2 S1
Saskatchewan Species at
Risk Status:
None
COSEWIC Status:
Special Concern
 
Woolly heads is endangered because it is highly restricted and extremely rare in Saskatchewan. It is usually locally numerous but within limited localized areas.
 
SPECIES DESCRIPTION
 
Height: 1 – 10 cm
Roots: thin, fibrous
Stems: branched at base, loosely woolly
Leaves: opposite, sessile, crowded, 1 – 3.5 cm long, 2 – 6 mm wide, linear to oblong or lance-shaped, tip short-tapered, loosely silky-hairy, especially at base, margin smooth
Inflorescence: heads small, with disc flowers only, solitary or in terminal clusters or in forks of branches; true bracts absent, upper leaves resembling bracts, woolly; receptacle nearly globular, with bracts
Flowers: outer florets female, fertile, petals thread-like, enveloped by woolly bract; central flowers few, male, without bracts
Fruits: achene 1 – 1.7 mm long, cylindrical, brown, smooth, in loose bladder-like bracts; pappus absent
 
KEY FOR PSILOCARPHUS FOUND IN SASKATCHEWAN
 
Psilocarphus can be distinguished from other discoid asters by woolly hairs, opposite leaves and a lack of glandular hairs, prickles, and spines.