Illinois Natural History Survey - University of Illinois

Panicum longifolium
Long-leaved panic grass
Taxonomy

Synonyms: Panicum rigidulum subsp. pubescens

Subspecific taxa:

Classification:

  • Magnoliophyta

Other taxonomic & nomenclature sources: USDA PlantsITISThe Plant ListIPNI

Species Distribution
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County Map Legend
Absent:
Not known from county
Medium confidence:
Medium or unknown confidence;
often old records or unverifiable observations
Medium-high confidence:
Often observations by expert botanists
High confidence:
Often vouchered herbarium records
Planted / introduced:
Native species introduced outside historic range,
or only in planted locations within county (e.g., restorations)
Historic / extirpated:
Only historic records for the species; likely extirpated
(Note that this category is not yet functional)

North American distribution maps for this species: FLNAUSDA PlantsBONAPBISON

Collection & Observation Phenology [?]

J
0
F
0
M
0
A
0
M
0
J
0
J
0
A
0
S
0
O
0
N
0
D
0

Collection & Observation Timeline [?]

Species Status

Status/Listing: Extinct

Notes:According to Ebinger et al. 2010, "Panicum longifolium (long-leaved panicum) [Panicum rigidulum subsp. pubescens]. A common grass species of open sandy habitats on the Atlantic and Gulf coastal plains of the United States, it has been reported from Monroe County by Mohlenbrock (2001b, 2002a) [rocky ledge ravine limestone cliff, 1962, (SIU)]. This is the only known collection or sighting of this species in Illinois and the long-leaved panicum is considered extirpated from the state (Bowles et al. 1991)."

Origin: Native

Species Description

General: Monocot, perennial

Roots: adventitious, fibrous

Shoots: alternate leaf arrangment; simple leaf type; entire leaf margin; Parallel leaf venation; awl-shaped leaf shape

Inflorescence: panicle, spike

Flowers: perfect; complete, regular; hypogynous ovary position

Fruit: grain

Physiology: autotrophic; C3 C02 fixation

Ecology & Natural History

Habitat: Limestone ledge in a wooded ravine.

ILPIN Notes: Densely tufted; sheaths keeled, pubescent at junction with blade. Northwestern range limit.

Functional Relationships:

Human Relationships:

  • Edibility [?] :
  • Showy Flowers:

Wildlife and Livestock Information:

  • Food Value:
  • Cover Value:

Coefficient of Conservatism (C-value) [?] :

  • Entire State: 10
  • Chicago Area: 10

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