Plant Image
Plant
- Desert Botanical Gardens Herbarium Collection, Usage rights: Attribution-Non-Commercial(CC BY-NC)


Yavapai County Native & Naturalized Plants

Panicum hirticaule - Mexican panicgrass

Synonyms: Panicum pampinosum, Panicum alatum
Other Common Names: witchgrass, roughstalk witchgrass, woodland panic
Plant Form: Grass

Family: Poaceae


   
 
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Leaves
Arizona State University Vascular Plant Herbarium, Usage Rights: Non-Commercial (CC BY-NC)
Seedhead
Max Licher @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Spikelets
Liz Makings @http://swbiodiversity.org, Usage Rights Creative Commons Attribution-ShareAlike (CC BY-SA)
  Grass Description -   Glossary of Grass Terminology


Origin: Native    Season: Warm
Habitat Description: Dry slopes, plains and sandy washes and in open woodlands and ponderosa pine forests.
Plant Communities:Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest
Elevation: 3500 - 7500 feet


General Description

Desc: Stem nodes swollen or brittle, stems erect to reclining on the ground with tips ascending, 8 to 43 inches tall. Branched seedheads 3-1/2 to 12 inches long, 1/4 to 1/2 inch wide, erect or nodding.
Identification Notes: Spikelets less than 1/4 inch long and like other Panicums sp. round and awnless. Branched seedhead less than half the length of the seedhead stem, the branches not wide-spreading.
Grass Type: Annual  Rhizomes: N  Stolons: N
Large Dense Clump (> 2 feet): N  Bushy (highly branched): N
Height with Seedheads: Greater than 36 inches
Seedhead Structure: Branched - open and spreading  Seedhead Droops: Y
Flowering Period: Jun - Sep
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: Spikelets are 1/16 to 1/4 inch long, ovoid, reddish-brown with prominent veins, 2-flowered, the first floret reduced to a sterile lemma and the second floret fertile.
Vegetative Charcteristics

Blade Hairy: Y    Blade with White Margins: N    Blade Cross section: Flat
Blade Notes: Blades are flat with clasping bases, 1 to 12 inches long, 1/8 to 1-1/4 inches wide.
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  
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