Plant Image
Herbarium specimen
- Usage Rights: CC BY-NC (Attribution-Non-Commercial)


Yavapai County Native & Naturalized Plants

Urochloa arizonica - Arizona signalgrass

Synonyms: Brachiaria arizonica, Panicum arizonicum
Plant Form: Grass

Family: Poaceae


   
 
line decor
  Home   Plant Communities Plant List Search Forbs and Subshrubs Search Grasses Search Woody Plants Additional Resources About this Website
line decor
 

Click on Any Image for a Larger View

Blades w/hairs
Patrick Alexander @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Spikelets
Patrick Alexander @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Seedhead
Patrick Alexander @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
  Grass Description -   Glossary of Grass Terminology


Origin: Native    Season: Warm
Habitat Description: Found on open rocky slopes, in sandy washes and canyon bottoms.
Plant Communities:Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland
Elevation: 1000 - 5500 feet


General Description

Desc: Annual grass that is much-branched at the base. Stems branch from the lower nodes and are 4 to 24 inches long. Stems may be erect or sprawl along the ground with ascending tips.
Identification Notes: Tufted annual grass up to 2 feet; stems bent at base, nodes swollen, sometimes rooting; seedheads spikelike, spikelets in 2 rows; awnless spikelets are 2-flowered, 1 sessile and sterile, 1 stemmed and fertile; glumes noticeably unequal.
Grass Type: Annual  Rhizomes: N  Stolons: N
Large Dense Clump (> 2 feet): N  Bushy (highly branched): Y
Height with Seedheads: 12 to 24 inches
Seedhead Structure: Branched - contracted  Seedhead Droops: N
Flowering Period: Jun - Oct
Flower Characteristics

Number of Flowers per Spikelet: Multi-flowered  Spikelets One-sided: N
Awns: Absent   Three Awns: N  Awns Bent: N
Flower and Seedhead Notes: Seedhead is 2-3/4 to 8 inches tall with appressed or erect-spreading hairs. Spikelet stalks are paired and appressed; spikelets are 2-flowered, the first floret is sterile and the second floret is fertile.
Vegetative Charcteristics

Blade Hairy: Y    Blade with White Margins: N    Blade Cross section: Flat
Blade Notes: Blades are flat, 2 to 6 inches long and up to 1/2 inch wide. Leaves may be smooth or rough and are hairy on the margins near the base.
Sheath Hairy: Y    Tuft of Hairs at top of Sheath or Collar: Y    Ligules: Membranous and hairy
Auricles (Ear-like lobes at collar area: N

Forage Value: Not available.


  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