Before these populations were located the plant had been feared extinct.

Its population has fluctuated throughout the years; at one point in the early 1980s it was feared extinct.

So rare it was, not seen in generations, feared extinct.

By the 1960s the only known populations of the plant had disappeared and in the 1970s it was feared extinct.

It has not been seen since 1947, however, and it is feared extinct.

In the 1970s no populations were known to be extant and the grass was feared extinct.

This plant was feared extinct when the last known individuals died in 1996.

It has not been sighted since April 29, 1981 and feared extinct.

It was last reported in 1876 and is feared extinct.

The plant was feared extinct until small remaining occurrences were discovered in 1986.