Desert Botanical Garden has 37 Coryphantha minima clones that were produced through tissue culture of 2 seeds. Initially, the tiny plants were undifferentiated tissue, and did not resemble Coryphantha minima. The plants have grown and individual heads can be now be distinguished. Two of these plants flowered for the first time in 1997. Cross-pollination was attempted, but no fruit resulted

The Desert Botanical Garden has been unable to visit other potential sites, and the conservation collection consists of only 7 genetic individuals, 12 field-collected seeds, and 1,910 seeds produced in cultivation.

The Desert Botanical Garden has been unable to visit other potential sites, and the conservation collection consists of only 7 genetic individuals, 12 field-collected seeds, and 1,910 seeds produced in cultivation.

Known from only 3 populations, all in a tiny area of Brewster County, Texas. Highly threatened by collectors.

Collection is the threat that most affects Coryphantha minima, but this threat is mitigated by militantly protective landowners who do not allow non-locals to access the land (USFWS 1979, 1984). Overgrazing does not impact C. minima, as the habitat is ex

There are apparently three known populations, none of which can be accessed currently, numbers of individuals per population, demographic information, or direction of trends are not known (USFWS 1984).

Currently, little research has been accomplished on C. minima, due to blanket denial of access to the site. Efforts have been made to form an association with a nearby land manager who does have permission to access the site. Little quantitative data has been obtained so far. Plants in cultivation began to flower in mid-May and continued to flower through June. Controlled cross-pollinations were attempted, but no fruits resulted. One of the plants flowered that had been tissue-cultured at ASU and received at Desert Botanical Garden on 3 March 1995. Plants were periodically sprayed with a dilute solution of Marathon to prevent spider mite infestation.

Land is managed in the style of the most land associated with the Trans-Pecos Heritage Association (relatively heavily grazed).

Additional information of every kind is needed. Because of the difficulties in accessing plants located on the Caballos-Novaculite formation which lies primarily on privately owned land, little is known about population trends of Coryphantha minima in the wild. It is possible that populations of this talon are stable and the plant may become a candidate for de-listing; without surveys to determine the approximate distribution and numbers of populations, the species may remain on the Endangered Species list indefinitely. There is a critical need to recollect seed from wild populations located on private land, as the twelve field-collected seeds held by the Desert Botanical Garden are now twelve years old.

The Desert Botanical Garden has been unable to visit other potential sites, and the conservation collection consists of only 7 genetic individuals, 12 field-collected seeds, and 1,910 seeds produced in cultivation. Desert Botanical Garden has 37 Coryphantha minima clones that were produced through tissue culture of 2 seeds. Initially, the tiny plants were undifferentiated tissue, and did not resemble Coryphantha minima. The plants have grown and individual heads can be now be distinguished. Two of these plants flowered for the first time in 1997. Cross-pollination was attempted, but no fruit resulted.