[The Genus Trisetum East of the Cascade Mountains of Oregon and Washington]

Downy Oatgrass, Narrow False Oat, Spike Trisetum

Trisetum spicatum

Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum

Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum)

Spike trisetum as seen along the summit ridge between the East Rim Viewpoint and the Steens Mountain summit, Harney County, Oregon........September 1, 2011.

Inflorescence of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum) - Close-up of the inflorescence of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum) - Lower culms of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum)

Additional close-ups of spike trisetum as seen along the summit ridge between the East Rim Viewpoint and the Steens Mountain summit, Harney County, Oregon.........September 1, 2011.

Close-up of the inflorescence of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum) - Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum) - Base of the culms of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum)

Additional close-ups of spike trisetum as seen on a rock and gravel bald at the crest of the Onion Creek Trail, northeast ridge of Strawberry Mountain, Strawberry Mountain Wilderness...........August 18, 2011.

Close-up of a maturing inflorescence of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum) - Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum)

Additional examples of spike trisetum as seen at about 9200' at the head of the Little Blitzen Gorge, Steens Mountain, Harney County, Oregon...........September 1, 2011.

Close-up of the inflorescence of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum) - Inflorescence of Downy Oatgrass, Narrow False Oat, Spike Trisetum: Trisetum spicatum (Synonyms: Aira spicata, Trisetum montanum, Trisetum montanum var. shearii, Trisetum sesquiflorum, Trisetum spicatum ssp. alaskanum, Trisetum spicatum ssp. congdonii, Trisetum spicatum ssp. majus, Trisetum spicatum ssp. molle, Trisetum spicatum ssp. montanum, Trisetum spicatum ssp. pilosiglume, Trisetum spicatum var. alaskanum, Trisetum spicatum var. congdoni, Trisetum spicatum var. maidenii, Trisetum spicatum var. majus, Trisetum spicatum var. molle, Trisetum spicatum var. pilosiglume, Trisetum spicatum var. spicatiforme, Trisetum spicatum var. spicatum, Trisetum spicatum var. villosissimum, Trisetum subspicatum, Trisetum triflorum, Trisetum triflorum ssp. molle, Trisetum villosissimum)

Spike trisetum as seen (left) at about 9000' along the South Loop Road about one mile downhill to the west of the East Rim Viewpoint, Steens Mountain, Harney County, Oregon.........September 2, 2011. A close-up image of the inflorescence of spike trisetum as seen (right) along the East Fork Lostine River Trail #1662 adjacent to Lost Lake, Eagle Cap Wilderness.........August 4, 2016.
Paul Slichter