2 1930 Oct. 12. Dr. Melanthium group. Oenanthe and Tricyanus seem to be founded on the same species, Zygadenus latifolius, which is typically found in Southern U.S., reaching northward to New Jersey in a variety which has a branched fluorescence and a better developed glandular structure at the base of its penultimate segments. The gland [illegible] is not truly a glandular structure, but appears (at least for the southern material) to be a thickening of veins near the base of the segment; in the northern material the structure is more prom- inent. The species should therefore be referred to Zygadenus. The genus Amanthium appears to be monotypic and characterized by the deeply-etchy seed, whereas in Zygadenus the seed is broadly winged like Ailanthus or Dolynchia. It is questionable also whether there is any actual difference between Melanthium virginicum and I. latifolium. Oct. 18. Sun. Melanthium group. This shows some signs of clearing. Amanthium Helonias graminifolia Michx. apparently antedated by Melanthium denseum Desrousseaux, which Asa Gray had rejected, nevertheless it seems to me, with Amanthium muscetoxicum. There seems to be a little variation in A. muscetoxicum from plants with narrow leaves on the Coastal Plain to the broader-leaved plant of the interior. Melanthium virginicum and latifolium also seem to be badly confused, the bulk of material being M. latifolium. It is questionable whether the glandular character