Aristida longespica var. longespica
Three awn, Slimspike threeawn Taxonomy
Synonyms: Aristida longispica, Aristida longespica, Aristida longispica var. longispica Subspecific taxa: Classification: Other taxonomic & nomenclature sources: USDA Plants;  ITIS;  The Plant List;  IPNI 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: FLNA;  USDA Plants;  BONAP;  BISON
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Species Status
Status/Listing: No Information Notes: Origin: Native
Species Description
General: Monocot, annual Roots: adventitious, fibrous Shoots: alternate leaf arrangment; simple leaf type; entire leaf margin; Parallel leaf venation; awl-shaped leaf shape Inflorescence: panicle Flowers: perfect; 3 merous; complete; hypogynous ovary position Fruit: grain Physiology: autotrophic; C4 C02 fixation Reproduction:
Ecology & Natural History
Habitat: Species is distributed on sandy soil, especially in fields and along railroads and highways; rocky prairies; bluff edges; open woods and eroded slopes; open and waste ground; and especially in hard clayey soil. ILPIN Notes: Two varieties are listed in Ref. 8 and on master list. Specific epithet is sometimes spelled longispica (Ref. 7). Stephens, H.A. 1980. Poisonous Plants of the Central United States. Regent Press of Kansas. Lawrence, KA. 165 pp. Baskin, J. M., and C. C. Baskin. 1981. Photosynthetic pathways indicated by leaf anatomy in fourteen summer annuals of cedar glades. Photosynthetica 15: 205-209. Species is occasional throughout the state, although rare to absent in the north-central counties. This type variety has lateral awns 3-4 mm long, central awn 6.5-13.0 mml., and glumes of 4-6 mm long. It has unique feature of having conspicuous basal bend of the center awn. Functional Relationships:
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