PNF – Plant not found.
    TNF – Tag not found.
     nd   – No data.
     NP   – Not present.
       –    – Missing data.


Concerning data on regrowth involving multiple pups:
    1) There is not necessarily a direct 1:1 correspondence between sequential figures for individual pups within a single plant.
    2) It was not uncommon for some or all pups to be partly or entirely covered with soil so some photos may reflect the pre-uncovery state.

    Images of the tags can be viewed via the links for the tag numbers and images of the actual plants can be viewed using the links in the columns headed "Regrowth as number of pups".

    The following 20 plants (#201-220) were harvested during the November 2008 monitoring to make up for what was then believed to be lost plants from the original group of 50 harvested individuals. The March 2009 data presented below followed a severe drought that lasted throughout the winter and into the spring, up through the date of the March monitoring.

Regrowth study site showing typical Tamaulipan thornscrub vegetation

   

    If you would like to help support additional studies of this type, designed to answer basic questions that are critical to the optimal stewardship/management of vulnerable cactus species, please send a contribution, of $25 USD or whatever amount you can afford, to the Cactus Conservation Institute, 909 E. Sul Ross Ave., Alpine, TX 79830.
    We also now accept donations via PayPal.