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Thinopyrum ponticum - tall wheatgrass

Scientific Family
Poaceae
Synonyms
Elymus elongatus, Agropyron elongatum, Agropyron varnense
Other common names
rush wheatgrass
Plant type
Grasses
Riparian
Yes

Grass Description

Origin
Introduced
Season
Warm

Found in disturbed, often wet, alkaline areas.

Plant Community
Disturbed Areas
Riparian
Low elevation
0
High elevation
6000

General Description

Tall, wide, densely clumped grass with erect seedhead stems. It has been planted along roadsides for stabilization. It is one of the most saline tolerant grasses commercially available.

Densely clumping perennial. Sheaths hairy on lower margins. Auricles less than 1/16 inch long. Blades rolled longitudinally, with ribs on upper surface. Seedhead erect, to 16 inches long. Spikelets one per node, 5 to 18 florets. Glume veins about equal.

Grass type
Perennial bunchgrass
Rhizomes
No
Stolons
No
Clump Diameter 2 ft or more
Yes
Bushy - highly branched
No
Height with Seedheads
Greater than 36 inches
Seedhead Structure
Unbranched
Seedhead droops
No
First bloom month
June
Last bloom month
July

Flower Characteristics

Flowers per Spikelet
Multi-flowered
Spikelets One-Sided
No
Awns
Absent
Three Awns
No
Awns bent
No
Flower and Seedhead Notes

Elongate robust seedhead stems, 14 to 30 inches long. Spikelets one per node, elliptic to oblong, 5 to 18 fertile florets, diminished florets at the apex, laterally compressed. Glumes blunt.

Vegetative Characteristics

Blade is hairy
Yes
Blade margins white
No
Blade cross-section
Convolute - rolled up longitudinally

Blades 8 to 18 inches long, thin, and stiff. Leaf blade surface ribbed. The blades are often covered with short stiff hairs making them rough to the touch.

Sheath is hairy
Yes
Tufts of hair top of sheath or collar
No
Ligule
Membranous
Auricles
Yes

Good. Tall wheatgrass is most palatable during the early spring months and should be managed during this time. If not, old coarse growth may inhibit grazing the following year. It must be grazed heavily to maintain plants in the vegetative state.