CPC National Collection Plant Profile
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Tripsacum floridanum
Family: |
Poaceae |
Common Names: |
Florida gama grass, Florida mock gamagrass |
Author: |
Porter ex Vasey |
Growth Habit: |
Graminoid |
CPC
Number: |
4345 |
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Primary
custodian for this plant in the CPC National Collection of Endangered
Plants is: |
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Meghan Fellows contributed to this Plant Profile. |
Tripsacum floridanum
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Tripsacum floridanum is a smaller relative of the more common T. dactyloides (Eastern Gamagrass), distinguished primarily by slightly wider leaf blades, usually less than one meter (three feet) tall and usually having solitary spikes (Hitchcock 1951). In southern Florida, T. floridanum is listed as being present in low rocky pinelands (Hitchcock 1951) usually in the shallow soil of crevices (Long and Lakela, 1971). It is also known from Cuba and perhaps other Caribbean islands (de Wet et al. 1976).
Interestingly, and importantly, the genus Tripsacum is known to hybridize with the genus Zea, which is the genus that corn belongs to. The unique genetic traits in the rare Tripsacum floridanum have already been used to develop a strain of corn that is resistant a type of leaf blight. (de Wet et al. 1976, Dewald et al. 1999)
Distribution
& Occurrence |
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State Range
Habitat
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Tripsacum floridanum can be found in the shallow soil of rock crevices in low, rocky pinelands of the Miami Rock Ridge (Hitchcock 1951, Long and Lakela 1971, Wunderlin 1998). |
Distribution
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Dade, Collier and Monroe counties in southern Florida (Hitchcock 1951, de Wet et al. 1976, Wunderlin 1998). May also be known in Cuba (de Wet et al. 1976). |
Number Left
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Approximately 500 individuals are known from 20 sites. |
State/Area
Protection
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State/Area |
Rank |
Status |
Date |
|
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Florida |
S2 |
LE |
4/12/1990 |
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Conservation,
Ecology & Research |
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Ecological
Relationships
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Ecological relationships are unknown. |
Threats
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Threats to Tripsacum floridanum include urbanization, fire suppression and invasion of exotic species. |
Current Research Summary
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• Tripsacum floridanum has been used in genetic studies to help produce disease-resistant strains of crops
(Dewald et al. 1999).
• Fairchild Tropical Gardens is currently propagating this species. |
Current Management Summary
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Current management includes prescribed fires and removal of exotic species. |
Research Management Needs
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Research needs include further understanding the impact of fire patterns on Tripsacum floridanum and general reproductive biology. |
Ex Situ Needs
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Currently, Fairchild Tropical Gardens has an ex situ collection from several sources. |
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Books (Single Authors)
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Coile, N.C. 2000. Notes on Florida's Regulated Plant Index (Rule 5B-40), Botany Contribution 38. Gainesville, Florida: Florida Dept. of Agriculture and Consumer Services, Division of Plant Industry.
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Hitchcock, A.S.; Chase, A. 1950. Manual of the grasses of the United States. New York: Dover Publications.
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Long, R.W.; Lakela, O. 1976. A Flora of Tropical Florida: A Manual of the Seed Plants and Ferns of Southern Peninsular Florida. Coral Gables, FL: University of Miami Press. 962p.
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Wunderlin, R.P. 1998. Guide to the vascular plants of Florida. Gainesville, Florida: University Press of Florida. 806p.
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Electronic Sources
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(2002). Atlas of Florida Vascular Plants. [Web site] University of South Florida Institute for Systematic Botany. http://www.plantatlas.usf.edu/isb/default.htm. Accessed: 2008.
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Journal Articles
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de Wet, J.M.J.; Gray, J.R.; Harlan, J.R. 1976. Systematics of Tripsacum (Gramineae). Phytologia. 33, 3: 203-227.
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Dewald, C.L.; Sims, P.L.; Li, Y.; Sokolov, V. 1999. A novel cytoplasm for maize. Maize Genetics Conference Abstracts. 41: 114.
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Larson, S.R.; Doebley, J. 1994. Restriction site variation in the chloroplast genome of Tripsacum (Poaceae): phylogeny and rates of sequence evolution. Systematic Botany. 19, 1: 21-34.
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Li. Y.G.; Dewald, C.L.; Sims, P. L. 1999. Genetic relationships within Tripsacum as detected by RAPD variation. Annals of Botany (London). 84, 6: 695-702.
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Simone, G.W.; Hooker, A.L. 1976. Monogenic resistance in corn to Helminthosporium turcicum derived from Tripsacum floridanum. Proc. Am. Phytopath. Soc. 3: 207.
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USFWS. 1976. Proposed Endangered Status for 1700 U.S. Plants. Federal Register. 41: 24523-24572.
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White, S.E.; Doebley, J.F. 1999. The molecular evolution of terminal ear1, a regulatory gene in the genus Zea. Genetics. 153, 3: 1455-1462.
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This
profile was updated on 3/4/2010 |
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