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Panicum bulbosum - bulb panicgrass

Scientific Family
Poaceae
Synonyms
Panicum bulbosum var. minor, Panicum plenum, Zuloagaea bulbosa and others see SEINET.
Other common names
bulb panicum
Plant type
Grasses
Riparian
Yes

Grass Description

Origin
Native
Season
Warm

Rolling hills and rocky canyon slopes, mostly on riverbanks and moist mountain slopes; often in woodlands and pine forests.

Plant Community
Montane Conifer Forest
Pinyon Juniper Woodlands
Riparian
Low elevation
4000
High elevation
8000

General Description

A tall leafy grass with erect stems and bulbous swellings at the base, 20 to 48 inches tall. Seedheads well exerted above blades and pyramidal.

Tufted perennial with short knotty rhizomes, stems thickened, bulbous at the base. Seedhead open, loose and pyramidal, purple in the sun, spikelets rounded and 2-flowered. First glume much shorter than second. Sheaths hairy at the collar.

Grass type
Perennial bunchgrass
Rhizomes
Yes
Stolons
No
Clump Diameter 2 ft or more
No
Bushy - highly branched
No
Height with Seedheads
Greater than 36 inches
Seedhead Structure
Branched - open and spreading
Seedhead droops
No
First bloom month
July
Last bloom month
October

Flower Characteristics

Flowers per Spikelet
Multi-flowered
Spikelets One-Sided
No
Awns
Absent
Three Awns
No
Awns bent
No
Flower and Seedhead Notes

Seedhead 4 to 16 inches long, lower branches spreading, branchlets and spikelet stems appressed. Spikelets 2-flowered, one sterile, one fertile. Glumes unequal, 1st glume shorter. Lemma tapers to a point.

Vegetative Characteristics

Blade is hairy
Yes
Blade margins white
No
Blade cross-section
Flat

Blades flat and thin, up to 24 inches long. Blades may be smooth or slightly hairy.

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

Fair to poor. Stems become very woody when mature.