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Although the venation characteristic of the lem¬ ma appears to he useful in separating B. catharticus var. rupestris from variety catharticus it is often (usually) very difficult to see even under 20X mag¬ nification. Other specimens, such as Kurtz 10034 (CORD) from Puesto Lima, Mendoza, have a few spikelets with additional bracts below the glumes that are 1â€"3-nerved. Another specimen (Kurtz 5668, CORD), from the Rio Atuel, Mendoza, has a few spikelets with an additional 5-nerved bract at the base. Besides these few aberrant characteris¬ tics, all other characteristics seem to be consistent with those described for this variety.

Medicinal plant extraction is a relevant issue in the province of Co´rdoba, Argentina. A quantitative methodology is proposed for the evaluation of conservation priorities for species used in popular medicine in the Paravachasca Valley, Co´rdoba. Qualitative attributes were surveyed through the knowledge and perception of local communities. Species are ranked by their index of conservation priority (ICP) values. This index takes into consideration the following data: harvest, abundance, propagation method, origin and commercial demand of species in the area. Among the native species prioritized for conservation are Minthostachys