11 Nov. 14 (Thursday) Worked in local flora section on tree cutting etc. Examined Wordisia specimens, examined also some of Yates' Compositae. Nov. 15 (Friday) Continued with the Tennessee variety of Zizia aurea. Zizia is very poorly distinguished, as a genus, from Thaspium. The carped in Z. aurea are much more winged than would be supposed from the drawings in Britton, which are copied from those of Coulter and Rose in Brit. Fl. Gr. Both Thaspium aureum and Zizia aurea were found by Blake to grow on the same plant, consequently the name Thore for the latter is Thaspium trifoliatum (Walt.) Gray. Trifoliatum is differentiated from Z. aurea by the entire basal leaves, and also by the cartilaginous dentations of the leaves. Z. cordata has coarser leaves throughout. Nov. 16 (Saturday) Continued the Umbelliferae. I found Thaspium trifoliatum has upper leaflets somewhat coarser than in Zizia aurea and less coarse than Z. cordate. Zizia vari Bebbii is much slenderer than Z. aurea and is of almost identical appearance with Z. arenicola but with fruit half the size of the latter. Z. Bebbii and Z. arenicola are apparently distinct species of Alleghenian and Coastal Plain distribution, respect- ively, in aspect most similar to Pyronthemum tropophygeri and P. hyssopifolium. The Tenn. collection of Zizia aurea should be called var. pubescens.