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Hesperostipa comata - needle & thread

Scientific Family
Poaceae
Plant type
Grasses
Riparian
No

Grass Description

Origin
Native
Season
Cool

Sandy or rocky soils, disturbed sites and open woodlands. Prefers drained, sandy or gravelly soils and also shallow or deep sand loam, fine sandy loam, or even shallow and deep clays.

Plant Community
Disturbed Areas
Interior Chaparral
Montane Conifer Forest
Pinyon Juniper Woodlands
Grasslands
Low elevation
3500
High elevation
7500
Similar species
Hesperostipa neomexicana

General Description

Perennial bunchgrass producing erect, unbranched stems to about 3 feet in maximum height. The narrow inflorescence is up to 11 inches long in taller plants, with the mature spikelet bearing a spiraling, hairy, spear-shaped awn.

Tufted perennial; narrow blades; terminal awn segments are not plumose, basal portion may have short hairs; panicle branches are spreading; spikelets are 1-flowered; awns 4 to 7 inches long, twice bent. H. neomexicana awns are plumose terminally.

Grass type
Perennial bunchgrass
Rhizomes
No
Stolons
No
Clump Diameter 2 ft or more
No
Bushy - highly branched
No
Height with Seedheads
24 inches or more
Seedhead Structure
Branched - contracted
Seedhead droops
No
First bloom month
May
Last bloom month
July

Flower Characteristics

Flowers per Spikelet
One-flowered
Spikelets One-Sided
No
Awns
Greater than 1 inch
Three Awns
No
Awns bent
Yes
Flower and Seedhead Notes

Contracted and narrow seedhead is a mass of curly awns. The base of the seedhead is usually partially hidden in the sheath. Awns are 2 to 10 inches long.

Vegetative Characteristics

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

About 1/16 inch wide and tightly involute, usually long, threadlike and smooth.

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

This grass is moderately palatable to wildlife and domestic stock. The plant provides highly palatable early spring forage but the summer fruit has a sharp awn that may injure grazing animals. This grass is often used to revegetate disturbed sites.