TRUENESS-TO-SPECIES IN SEED SAMPLES OF MEDICAGO, WITH A NOTE ON 2n = 14 SPECIES

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Abstract
Out of 47 seed samples of M. hispida Gaertn. received from different botanical gardens, institutions and individual botanists one-half, or 23, were found to be incorrectly labeled. Mislabeling was noted also in samples of other Medicago species. Chromosome counts were used to great advantage in verifying the labeling. Only 3 species (M. hispida, M. praecox and M. riqidula) have 2n = 14; other 2n-numbers therefore indicated that some other species were on hand. Sorting out M. riqidula from the two other 2n = 14 species was possible on the basis of pod characters alone. However, owing to its extreme variability it was difficult to separate M. hispida from M. praecox, though differences in pod characters between these two species were noted. The chromosome complements of these two species also appeared to be similar. Genetical tests are needed to establish the true relationship of these two species.

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