Dichanthelium acuminatum var. fasciculatum (Torr.) Freckmann
Species Image Gallery
(opens in a new window)
 
TAXONOMY
 
Family: Anacardiaceae
Genus: Dichanthelium
 
Species Synonyms: Dichanthelium acuminatum var. implicatum (Scribn.) Gould & C.A. Clark
Dichanthelium lanuginosum (Ell.) Gould
Dichanthelium lanuginosum var. fasciculatum (Torr.) Spellenberg
Panicum acuminatum var. fasciculatum (Torr.) Lelong
Panicum acuminatum var. implicatum (Scribn.) C.F. Reed
Panicum brodiei St. John
Panicum curtifolium Nash.
Panicum glutinoscabrum Fern.
Panicum huachucae Ashe
Panicum huachucae var. fasciculatum (Torr.) F.T. Hubbard
Panicum implicatum Scribn.
Panicum languidum A.S. Hitchc.
Panicum lanuginosum Ell., non Bosc ex Spreng.
Panicum lanuginosum var. fasciculatum (Torr.) Fern.
Panicum lanuginosum var. huachucae (Ashe) A.S. Hitchc.
Panicum lanuginosum var. implicatum (Scribn.) Fern.
Panicum lanuginosum var. tennesseense (Ashe) Gleason
Panicum lassenianum Schmoll
Panicum lindheimeri var. fasciculatum (Torr.) Fern.
Panicum occidentale Scribn.
Panicum pacificum A.S. Hitchc. & Chase
Panicum subvillosum Ashe
Panicum tennesseense Ashe
Common Names: western panicgrass
hairy panicgrass
tapered rosettegrass
woolly panicgrass
 
DISTRIBUTION
 
Canada: southern Alberta – Saskatchewan – Ontario – Quebec – Nova Scotia
Saskatchewan: widespread; Lake Athabasca – Amisk Lake – Roche Percee
Ecoregion: Moist Mixed Grassland, Aspen Parkland, Churchill River Upland, Athabasca Plain, Tazin Lake Upland
 
HABITAT
 
Saskatchewan: dry, sandy open woods and clearings and exposed rock outcrops
Associated Species: bronze sedge, jackpine, Norwegian cinquefoil, poverty oatgrass, saskatoonberry, ticklegrass, trembling aspen
 
RARITY STATUS
 
Provincial Status According
to Harms (2003):
Vulnerable
Nature Conservancy Status:
G5 T5 S2
Saskatchewan Species at
Risk Status:
None
COSEWIC Status:
None
 
Western panicgrass is vulnerable because it is rare or uncommon in Saskatchewan and most local populations are small. No threats are known or anticipated for this species at the present time.
 
SPECIES DESCRIPTION
 
Height: 10 – 70 cm tall
Roots: fibrous
Stems: densely tufted, ascending or spreading, nodes densely hairy, internodes purplish or olive to yellowish-green, distinctly long-hairy, hairs with swollen bases
Leaves: basal rosettes well-differentiated; stem leaves 4 – 7, 5 – 12 cm long, 5 – 12 mm wide, oval to lance-shaped, short hairy, hairs with swollen bases above; sheath hairy, shorter than the internodes; ligule of hairs, to 3 mm long
Inflorescence: branched, 3 – 6 cm long, dense, central axis long-hairy
Spikelets: 1.5 – 2 mm long, lower florets sterile
Florets: glumes shorter than spikelets, subequal; sterile lemmas similar to glumes; fertile lemmas grooved, dry, hardened, shiny; fertile paleas grooved
Fruits: grain
Other: plants yellowish-green to purple; stems of autumn phase repeatedly branched and spreading, forming a dense cushion
 
DICHANTHELIUM KEY FOR SPECIES FOUND IN SASKATCHEWAN
 
1 Basal leaves similar in shape to stem leaves
2
1 Basal leaves well-differentiated from stem leaves
3
   
2 All stem leaves 4 – 8 cm long, similar, leaves distributed more or less evenly up the stem
D. wilcoxianum
2 Upper stem leaves 10 – 20 cm long, distinctly longer than lower leaves, main stem leaves rather prominently basally distributed
D. linearifolium
   
3 Ligules of hairs; spikelets less than 2.5 mm long
D. acuminatum var. fasciculatum
3 Ligules membranous; spikelets more than 2.5 mm long
4
   
4 Leaves and spikelets with basally swollen hairs; inflorescences slightly longer than wide
D. leibergii
4 Leaves hairless; spikelets slightly hairy to almost hairless; inflorescences usually more than twice as long as wide
D. xanthophysum