New York Natural Heritage Program
Beakgrass
Diarrhena obovata (Gleason) Brandenburg
Monocots
Diarrhena obovata Troy Weldy
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: G4G5
A Global Rarity Rank of G4G5 means: Apparently or Demonstrably Secure globally - Uncommon to common in the world, but not rare; usually widespread, but may be rare in some parts of its range; possibly some cause for long-term concern due to declines or other factors. More information is needed to assign a single conservation status.


Did you know?
This species is at its northeastern limit of distribution in New York. The genus name does not derive from any kind of malady but rather from the two stamens in its flower (di=twice and arrhen=male).

State Ranking Justification [-]
There are two known populations of this plant first reported within New York in 1993. While there are only two populations, the state rank is based more on the total number and extent of plants numbering in the tens of thousands along a large part of the Wallkill River where it is the dominant plant in some sections.

Short-term Trends [-]

Long-term Trends [-]