Alkaloid screening. VI.

One thousand and five plant extracts were screened for the presence of alkaloids. The number of positive tests obtained was 267, or 34.01%. New to the literature are 137 species. In the five previous communications (1-5) in this series we have reported on the screening of 4,990 plant extracts for alkaloids. These 4,990 extracts represented 4,103 species of plants, of which 1,069 gave positive tests.