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 to this genus, Pellionia involucrata, Fr. and Sav.

Salicineæ. The willows, as is known, constitute a genus the species of which it is often very difficult to distinguish, whether by reason of their affinity, or on account of their diœcian state, and the non-contemporaneity in the development of their organs. I think I may cite as new for Japan, the Salix brachystachys, Benth. With regard to the Salix purpurea, which, Miquel says, has not been found since Thunberg’s time, it is not uncommon at Yokoska and in the province of Sagami.

Hydrocharideæ. I have received from M. Tanaka a beautiful specimen of the Vallisneria spiralis, L. It would be interesting to know the place where it was found.

Smilacineæ. I found at Niko a Disporum in fruit, the D. Nikoense, Fr. and Sav., which seems sufficiently distinct from all the known species: The Hekorima candida, Kunth., has been found in fruit, by Mr. Kramer, in the Niko hills. I will also mention the Smilax trinervula, Miq., unknown to M. Maximowicz; the Polygonatum pubescens, Pursh., grows in the woods around Yokoska.

Orchideæ. This beautiful family, which is represented in Japan by genera belonging to the most different latitudes, has lately been increased by some very interesting species. Gymnadenia longebracteata, Fr. and Sav., received from Mr. Ito Keiske; Habenaria Florenti, Fr. and Sav., from the Hakone hills; H. Nikoensis, Fr. and Sav., from Niko; Platanthera chlorantha, Fish., from Hakodate; Perularia fuscescens, Lindl., also from Hakodate, a rare species, only known in Siberia; Liparis plicata, Fr. and Sav.; Liparis Krameri, Fr. and Sav., from the province of Higo, and two other species of this genus not yet named. I owe all these to the courtesy of Mr. Kramer.

Junceæ. Juncus Japonicus, Fr. and Sav. from the Hakone hills and the environs of Yokoska, a plant nearly allied to the I. Cespiticius.

Cyperaceæ. I was much surprised to find in the rice fields of Yokoska, the Cyperus Mon'i L. common in central Europe, but not found beyond the Caucasus. The Japanese plant is somewhat more meagre, its capitules less furnished