New York Natural Heritage Program
Rusty Beard-moss
Didymodon ferrugineus (Schimp. ex Besch.) M. O. Hill
Didymodon ferrugineus Michael Luth
Family: (Pottiaceae)

State Protection: Not Listed
no state status.

Federal Protection: Not Listed

State Rarity Rank: S1S2
A State Rarity Rank of S1S2 means: Critically Imperiled or Imperiled in New York - Especially or very vulnerable to disappearing from New York due to rarity or other factors; typically 20 or fewer populations or locations in New York, very few individuals, very restricted range, few remaining acres (or miles of stream), and/or steep declines. More information is needed to assign a single conservation status.

Global Rarity Rank: G5T5?
A Global Rarity Rank of G5T5? means: Secure globally (most likely) - Conservation status of the subspecies/variety is uncertain, but is most likely common in the world; widespread and abundant (but may be rare in some parts of its range). More information is needed to assign a firm conservation status. (The species as a whole is common globally.)


Did you know?
Dr. Richard Zander, former curator of the Clinton Herbarium in Buffalo, used this moss to experiment with the change in color of moss leaves exposed to acids and bases. The acid-base color reaction is one of the only ways to distinguish this moss from the very similar moss Triquetriella californica (Zander 1980).

State Ranking Justification [-]
The rank is designated 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 [-]