New York Natural Heritage Program
Northern Gama Grass
Tripsacum dactyloides (L.) L.
Monocots
Tripsacum dactyloides spikelets David Werier
Family: Grass Family (Poaceae)

State Protection: Threatened
listed species are those with: 1) 6 to fewer than 20 extant sites, or 2) 1,000 to fewer than 3,000 individuals, or 3) restricted to not less than 4 or more than 7 U.S.G.S. 7 minute topographical maps, or 4) listed as threatened by U.S. Department of Interior.

Federal Protection: Not Listed

State Rarity Rank: S2
A State Rarity Rank of S2 means: This plant is threatened/imperiled in New York because of rarity (typically 6-20 populations or few remaining individuals) or is vulnerable to extirpation from New York due to biological factors.

Global Rarity Rank: G5
A Global Rarity Rank of G5 means: This species is demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
The federal plant materials center in Big Flats, New York has been growing northern gamma grass since the 1980s, when they began genetic experiments to improve the quality of the plants for cattle forage, site restoration, and biomass production (Salon and Dewald 2000). Plants found west of the coastal plain are not considered native to New York, because of this production and distribution.

State Ranking Justification [-]
There are 11 existing populations but only two of them have hundreds of plants. Most occurrences are very small in area. One occurrence from 1988 was extirpated by Phragmites. There are 10 other historical occurrences.

Short-term Trends [-]

Long-term Trends [-]