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Hordeum marinum - seaside barley

Scientific Family
Poaceae
Plant type
Grasses
Riparian
Yes

Grass Description

Origin
Introduced
Season
Warm

Found in moist disturbed areas in alkaline soils.

Plant Community
Disturbed Areas
Riparian
Low elevation
500
High elevation
6500
Similar species
Hordeum murinum

General Description

Loosely tufted annual with straight or slightly bent stems up to 20 inches tall, spreading at the base. Basal sheaths are somewhat hairy.

Hordeum marinum lacks auricles, which distinguishes it from H. murinum. Glumes straight, ascending to slightly divergent at maturity. Lemmas of the lateral spikelets with awns up to 1/4 inch long.

Grass type
Annual
Rhizomes
No
Stolons
No
Clump Diameter 2 ft or more
No
Bushy - highly branched
No
Height with Seedheads
12 inches or more
Seedhead Structure
Unbranched
Seedhead droops
No
First bloom month
April
Last bloom month
June

Flower Characteristics

Flowers per Spikelet
One-flowered
Spikelets One-Sided
No
Awns
1/4 inch to 1 inch
Three Awns
Yes
Awns bent
No
Flower and Seedhead Notes

Spikelets are dense up to 3 inches long; green or purplish on the awns and glumes. Three spikelets per node; lateral spikelets sub-sessile, sterile; central spikelets sessile and fertile. Lemma awns up to 1/4 inch long.

Vegetative Characteristics

Blade is hairy
Yes
Blade margins white
No
Blade cross-section
Flat
Involute – rolled inward on upper surface

Blades are thin and about 3 inches long, less than 1/4 inch wide; sparsely to densely hairy on both sides.

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

Grass is used by wildlife and stock for early season forage but contains little nutritive value, especially after setting seedheads.