New York Natural Heritage Program
Sieve-toothed dry rock moss
Coscinodon cribrosus (Hedw.) Spruce
Coscinodon cribrosus Des Callaghan
Family: (Grimmiaceae)

State Protection: Not Listed
no state status.

Federal Protection: Not Listed

State Rarity Rank: S1
A State Rarity Rank of S1 means: This plant is endangered/critically imperiled in New York because of extreme rarity (typically 5 or fewer populations or very few remaining individuals) or is extremely vulnerable to extirpation from New York due to biological factors.

Global Rarity Rank: G3G4
A Global Rarity Rank of G3G4 means: Vulnerable globally, or Apparently Secure -- At moderate risk of extinction, with relatively few populations or locations in the world, few individuals, and/or restricted range; or uncommon but not rare globally; 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?
It is the only species of the genus that has a hygrocastique peristome (ring of teeth at the capsule opening) which means its peristome opens when wet and is closed when dry (Flora of North America). In the past the species was put in the genera Grimmia and Weissia. It was assigned to the genus Coscinodon by Richard Spruce in 1849 (Spruce 1849).

State Ranking Justification [-]
The rank was confirmed to be S1 based on Cleavitt et al.'s (2006) report. Four specimens were verified. The last collection was made in 2005.

Short-term Trends [-]

Long-term Trends [-]