UW Burke Herbarium species comparison

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Panicum amarum

Panicum dichotomiflorum

fall panicum
Habit Annual, branching from the base, the culms somewhat decumbent, up to 1 m. tall.
Leaves

Sheaths open, usually glabrous; articulation below the glumes;

ligules 2-3 mm. long;

blades 5-12 mm. broad, usually glabrous.
Flowers

Inflorescence an open panicle 1.5-3 dm. long, the branches ascending;

spikelets 2-flowered, about 2.5 mm. long; first glume oval, less than 1 mm. long; second glume acute, faintly 9-nerved; lower lemma sterile, with a translucent palea 1-1.5 mm. long; hardened, fertile upper lemma and palea enclosed by the second glume and sterile lemma

Panicum amarum

Panicum dichotomiflorum
Flowering time May-September
Habitat Disturbed, often wet sites including stream banks and roadsides.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlanitc Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Introduced from eastern and central Washington
Conservation status Not of concern
Sibling taxa
P. capillare, P. dichotomiflorum, P. miliaceum
P. capillare, P. miliaceum
Subordinate taxa
P. dichotomiflorum ssp. dichotomiflorum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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