New York Natural Heritage Program
Southern Yellow Flax
Linum medium var. texanum (Planch.) Fern.
Family: Flax Family (Linaceae)

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: G5T5
A Global Rarity Rank of G5T5 means: Secure globally - Both the species as a whole and the subspecies/variety are common in the world; widespread and abundant (but may be rare in some parts of its range).

Did you know?
Even though Linum medium var. texanum is a variety of the species, the variety medium has double the chromosome number (n=36 verses n=18) and could be treated better as a separate species (Harris 1968). Variety texanum was described based on a specimen from Texas even though it is at the edge of its range there (Fernald 1935).

State Ranking Justification [-]
There are nine existing populations but only four of them are ranked good to excellent. Most populations have fewer than 100 plants and are threatened by succession or lack of proper management. There are 10 historical populations, but most of these occur in highly developed areas so the probability of relocating them is low.

Short-term Trends [-]

Long-term Trends [-]