New York Natural Heritage Program
Quill-leaf Arrowhead
Sagittaria teres S. Wats.
Sagittaria teres in flower Robert Zaremba
Family: Water-Plantain Family (Alismataceae)

State Protection: Endangered
listed species are those with: 1) 5 or fewer extant sites, or 2) fewer than 1,000 individuals, or 3) restricted to fewer than 4 U.S.G.S. 7 minute topographical maps, or 4) species listed as endangered by U.S. Department of Interior.

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: G3
A Global Rarity Rank of G3 means: This species is either rare and local throughout its range (21 to 100 occurrences), or found locally (even abundantly at some of its locations) in a restricted range (e.g. a single physiographic region), or is vulnerable to extinction throughout its range because of other factors.

Did you know?
The species name is Latin for cylindrical and refers to the quill-like leaves that are cylindrical in cross-section, unlike other leaves in the genus (Fernald 1950). It was first described and named by Sereno Watson, a 19th century botanist from Connecticut who worked at the Harvard Gray herbarium (Library of the Gray Herbarium 2008).

State Ranking Justification [-]
There are two large existing populations which consist of multiple, hydrologically connected ponds. There are two historical populations from the 1920s which have not been resurveyed and two additional populations that are considered extirpated.

Short-term Trends [-]

Long-term Trends [-]