Gymnopogon chapmanianus - A.S. Hitchc.
Chapman's Skeletongrass
Other Common Names: Chapman's skeletongrass
Taxonomic Status: Accepted
Related ITIS Name(s): Gymnopogon chapmanianus Hitchc. (TSN 41751)
Unique Identifier: ELEMENT_GLOBAL.2.135729
Element Code: PMPOA2Z030
Informal Taxonomy: Plants, Vascular - Flowering Plants - Grass Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Cyperales Poaceae Gymnopogon
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Gymnopogon chapmanianus
Conservation Status
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NatureServe Status

Global Status: G3
Global Status Last Reviewed: 12Jan1999
Global Status Last Changed: 23Jun1999
Rounded Global Status: G3 - Vulnerable
Reasons: Restricted to central Florida (31 occurrences) and Georgia. Many of the Florida occurrences are on managed areas. As with other plants of the central ridge, this species suffers from habitat degradation and alteration.
Nation: United States
National Status: N3

U.S. & Canada State/Province Status
United States Florida (S3), Georgia (SH)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Collier County, Florida - 'Gulf Coast to S. Peninsular, Florida`. Wunderlin (1982) lists as "nearly throughout" central Florida; Clewell (1985) lists for Wakulla and Dixie counties. Kartesz (Ga. checklist; see also Ga. atlas) accepts for southernmost Georgia as well.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: 31 Element Occurrences recorded by FNAI as of January 1999.

Population Size Comments: Wunderlin (1982) lists as "occasional".

Other NatureServe Conservation Status Information

Distribution
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Global Range: Collier County, Florida - 'Gulf Coast to S. Peninsular, Florida`. Wunderlin (1982) lists as "nearly throughout" central Florida; Clewell (1985) lists for Wakulla and Dixie counties. Kartesz (Ga. checklist; see also Ga. atlas) accepts for southernmost Georgia as well.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States FL, GA

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
FL Alachua (12001)*, Collier (12021)*, Columbia (12023), Dixie (12029)*, Flagler (12035)*, Hernando (12053), Highlands (12055), Hillsborough (12057)*, Manatee (12081), Okeechobee (12093)*, Osceola (12097), Pasco (12101), Polk (12105), Putnam (12107)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
03 St. Marys (03070204)+*, Oklawaha (03080102)+, Lower St. Johns (03080103)+, Kissimmee (03090101)+, Northern Okeechobee Inflow (03090102)+*, Big Cypress Swamp (03090204)+*, Manatee (03100202)+, Hillsborough (03100205)+, Crystal-Pithlachascotee (03100207)+, Withlacoochee (03100208)+, Upper Suwannee (03110201)+, Lower Suwannee (03110205)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A perennial grass. Leaf blades are broadly lance-shaped, 1-8 cm long.
Technical Description: GENUS characters: rigid perennial; blades broadly lanceolate, short, flat, & stiff, 1-8 cm long, basally subcordate; panicle with several to many spicate branches (stiff, slender, divergent spikes), the branches trigonous, loosely scattered along the upper part of the stem, often deflexed at maturity; spikelets pedicellate, 1- to 4-flowered, disarticulating above the glumes, nearly sessile, appressed and usually remote in 2 rows, along 1 side of a slender continuous rachis, the rachilla prolonged behind the 1 or more fertile florets bearing a rudiment of a floret, this sometimes bearing 1 or 2 slender awns; glumes narrow, acuminate, 1-nerved, usually longer than the floret, the second wider and often larger than the first; lemmas narrow, 3-nerved, the lateral nerves near the margin, the apex minutely bifid, bearing between the teeth a slender awn, or rarely awnless. THIS SPECIES: Stem 30-40 cm tall, stout; leaf-blades 5-6 cm long, about 5 mm wide; branches of panicle relatively stout; spikes ascending, approximate, floriferous from base; leafblades ascending; spikelets 2-4-flowered, the florets zigzag; awn shorter than the lemma. (Small 1933 and Clewell 1985) Includes Hitchcock's (1951) G. floridanus.
Diagnostic Characteristics: Distinguished from G. ambiguus by the awn of the lemma up to 2.5 mm long, usually shorter than the lemma body (vs. 4-10 mm long, longer than the lemma body); and from G. brevifolius by (1) spikelets 2-4-flowered (vs. 1-flowered); (2) panicle branches bearing spikelets nearly to the base (vs. mainly in the upper half of the branch); and (3) first glume 3.8-5.0 mm long (vs. 2.3-3.7 mm long). (Clewell 1985, Wunderlin 1982)
Duration: PERENNIAL
Reproduction Comments: Most grasses are wind-pollinated. Dispersal mechanisms in the family include wind (many species' seeds are plumed or winged) and various forms of animal transport.
Terrestrial Habitat(s): Forest - Conifer, Forest/Woodland, Shrubland/chaparral, Woodland - Conifer
Habitat Comments: Sandhills, sand pine scrub, sandy prairies, and pine flatwoods.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 12Jan1999
NatureServe Conservation Status Factors Author: Hardin, E.D. & rev. D. White (1991); rev. M.E. Stover, TNC-HO (2/95), L. Morse (1998); rev. L.G. Chafin (1/99)
Element Ecology & Life History Edition Date: 24Feb1995
Element Ecology & Life History Author(s): M.E. STOVER, TNC-HO

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Clewell, A.F. 1985. Guide to vascular plants of the Florida panhandle. Florida State Univ. Press, Tallahassee, Florida. 605 pp.

  • Duncan, W.H., and J.T. Kartesz. 1981. Vascular Flora of Georgia: An annotated checklist. Univ. Georgia Press, Athens. 143 pp.

  • Hitchcock, A.S. 1951. Manual of the grasses of the United States. 2nd edition revised by Agnes Chase. [Reprinted, 1971, in 2 vols., by Dover Publications, Incorporated, New York.]

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Kral, R. 1983c. A report on some rare, threatened, or endangered forest-related vascular plants of the South. U.S. Dept. of Agriculture Forest Service Technical Publication R8-TP2, Athens, GA. 1305 pp.

  • Small, J.K. 1933. Manual of the southeastern flora. Two volumes. Hafner Publishing Company, New York.

  • Wunderlin, R.P. 1982. Guide to the vascular plants of central Florida. Univ. Presses Florida, Gainesville. 472 pp.

  • Wunderlin, R.P. 1998. Guide to the Vascular Plants of Florida. University Press of Florida: Gainesville, Florida. 806 pp.

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