Details for: PI 434493, Tripsacum dactyloides (L.) L., San Marcos Germplasm


Summary Data
Taxonomy:
Tripsacum dactyloides (L.) L.
Top Name:
San Marcos Germplasm
Origin:
Collected – Texas, United States
Received by NPGS:
Mar 1979
PI Assigned:
1979
Form Received:
Rhizome
Life Form:
Perennial
Life Cycle:
Perennial
Availability
This accession is not available. Contact site for status.
 
There are no images for this accession.

Core Passport Data
Taxonomy:
Tripsacum dactyloides (L.) L.
Top Name:
San Marcos Germplasm
Origin:
Collected – Texas, United States
Received by NPGS:
Mar 1979
PI Assigned:
1979
Form Received:
Rhizome
Life Form:
Perennial
Life Cycle:
Perennial
Source History
Collected

Hays County, Texas, United States
Locality: San Marcos.

Donated
March 1979.
Mississippi, United States

Donor(s):
Accession Names and Identifiers
San Marcos Germplasm
Type: Other or unclassified name
Release name.

PMT-832
Type: Other or unclassified name

Narrative
Eastern gamagrass is a warm- season, native, perennial bunchgrass that grows to a height of 5 to 9 feet tall. The leaves are 12 to 30 inches long and ½ to 1½ inches wide with a well-defined midrib. Plants reproduce from seed and vegetatively from thick, knotty rhizomes. The spikes are 6 to 10 inches long and contain both male and female flowers. The female flowers are located on the bottom ¼ of the spike and the male flowers occupy the upper ¾ of the spike. Seed is produced from July to September with seed maturity beginning at the top of the spike and moving downward. This results in uneven maturation and increase susceptibility to seed shattering. There are approximately 7,107 seeds per pound.

San Marcos can be used in pure stands for grazed pastures and hay production. It has excellent forage quality and is highly palatable by all classes of livestock. Crude protein and digestibility range from 18% and 75%, respectively in early spring to 8% and 60%, respectively in late fall at the James E. “Bud” Smith Plant Materials Center. It exhibits major growth in early spring and stays green well into late fall. San Marcos also provides food and cover for wildlife. It can also be planted for filter strips, field borders, contour buffer strips, and cross wind trap strips for erosion control.
Tripsacum dactyloides (L.) L.
Genus:
Tripsacum
Section:
Tripsacum
Family:
Poaceae (alt. Gramineae)
Subfamily:
Panicoideae
Tribe:
Andropogoneae
Subtribe:
Tripsacinae
Nomen number:

40489
Place of publication:

Syst. nat. ed. 10, 2:1261. 1759
Verified:
03/04/2009 by ARS Systematic Botanists.
Other conspecific taxa
Tripsacum dactyloides (L.) L. var. dactyloides (0 active accession[s])
Tripsacum dactyloides (L.) L. var. hispidum (Hitchc.) de Wet & J. R. Harlan (1 active accession[s])
Tripsacum dactyloides (L.) L. var. meridonale de Wet & Timothy (84 active accession[s])
Tripsacum dactyloides (L.) L. var. mexicanum de Wet & J. R. Harlan (0 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Common names
LanguageNameAlternate namenoteseqCitation
Englisheastern gama grass  1Markle, G. M. et al., eds. 1998. Food and feed crops of the United States, ed. 2
Englishgama grass  11961. Webster's third new international dictionary.
Frenchherbe grama  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
GermanGamagras  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Portuguese (Brazil)capim-gigante  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanishmacillo  2Markle, G. M. et al., eds. 1998. Food and feed crops of the United States, ed. 2
Spanishpasto Guatemala  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanishzacate maicero  2Mejía-Saulés, M. T. & P. Dávila A. 1992. Gramíneas Útiles de México. Cuad. Inst. Biol. 16 Universidad Nacional Autónoma de México, Distrito Federal, Mexico. 261.
Swedishgamagräs  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
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Pedigree
Description:
Originally collected 1964 from native plants located in Hays County, Texas near the town of San Marcos.