New York Natural Heritage Program
Lowland Yellow Loosestrife
Lysimachia hybrida Michx.
Family: Primrose Family (Primulaceae)

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: 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?
This species is not really a hybrid of two other species but due to a confusion of specimens was named that way by the French botanist Andre Michaux (Fernald 1950).

State Ranking Justification [-]
There are eight existing populations but most of them are small, with fewer than 50 plants. There are also 17 historical populations known from the late 1800s through the 1960s that need to be rechecked although three of these populations no longer exist because their habitat has been destroyed.

Short-term Trends [-]

Long-term Trends [-]