Species Detail Grasses

Plant - fall Rimrock Verde Valley		Yavapai County Native & Naturalized Plants Bouteloua barbata - sixweeks grama Synonyms: Bouteloua arenosa, Chondrosum barbata, Chondrosum exile, Chondrosum microstachyum, Chondrosum polystachyum, C. subscorpioides Plant Form: Grass Family: Poaceae
Plant - fall Rimrock Verde Valley


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Plant - summer Pinyon Oaks Subdivision Sue Smith	Seedhead Rimrock Verde Valley John Kava	Seedhead - summer Pinyon Oaks Subdivision Sue Smith	Seedhead - summer Pinyon Oaks Subdivision Sue Smith


	Grass Description - Glossary of Grass Terminology Origin: Native Season: Warm Habitat Description: Found in open, rocky or sandy slopes and washes, often weedy on disturbed soils. Plant Communities:Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Disturbed Areas Elevation: Below 6000 feet General Description Desc: Small tufted short annual grass with numerous erect or spreading stems that grows to about 1 foot high. Seedheads have 4 to 12 comb-like branches. Identification Notes: Annual, many slender trailing stems. Sheaths smooth with hairs at the collar. Leaves <2mm wide. Ligule a fringe of hairs. Seedhead 4 to 12 branches of up to 40 one-sided spikelets, spikelets have one fertile and one rudimentary floret, lemmas awned. Grass Type: Annual Rhizomes: N Stolons: N Large Dense Clump (> 2 feet): N Bushy (highly branched): N Height with Seedheads: Less than 12 inches Seedhead Structure: Branched - comblike branches Seedhead Droops: N Flowering Period: Jul - Oct Flower Characteristics Number of Flowers per Spikelet: Multi-flowered Spikelets One-sided: Y Awns: Less than 1/4 inch Three Awns: Y Awns Bent: N Flower and Seedhead Notes: Seedhead with 4 to 12 comb-like branches with up to 40 spikelets per branch. Spikelets have 1 to 2 or occasionally 3 florets. The basal floret is fertile, the distal florets are sterile. Vegetative Charcteristics Blade Hairy: Y Blade with White Margins: N Blade Cross section: Flat or folded Blade Notes: Leaves are <1/8 inch wide, 2-1/2 inches long. Top surfaces are usually sparsely clothed with soft hairs or down, with a few nipple-like hairs basally. Sheath Hairy: N Tuft of Hairs at top of Sheath or Collar: Y Ligules: Membranous and hairy Auricles (Ear-like lobes at collar area: N Forage Value: Sixweeks grama provides poor forage for livestock. Plants are small, produce green feed for a short time, and have a weak root system that allows them to be pulled up easily during grazing. Sixweeks grama is almost worthless as forage after maturity.


	Arizona Cooperative Extension Yavapai County 840 Rodeo Dr #C Prescott, AZ 86305 (928) 445-6590	Version 8.0 http://cales.arizona.edu/yavapaiplants/SpeciesDetailGrass.php Last Updated: Dec 13, 2022 Content Questions/Comments: Email Matt Halldorson Legal Disclaimer