46 



young plants, from the seeds which were collected in 1899 and stored 

 in moist sand until the next spring, when they were sowed in pots together 

 with several kinds of conifers and Quercus. 



The haustorium seems to be developed on the root of any plant used 

 in the experiment ; even on the fibrous rootlets of a weed accidentaly 

 grown in the pot were found numerous small haustoria ; but in the 

 culture without any other plant the root of BucMeya developed no hausto- 

 rium, except however, when selfparasitism occurred as it is often the case. 

 The root hairs are always formed on the younger part of the root; 

 they become naturally functionless as soon as the haustorium is formed. 



The question arises on what kinds of plants is Bacldeya found parasitic 

 in nature. A careful examination should be made for answering this 

 question, but so far as I could ascertain by digging at different places the 

 following plants can be named provisionally as host plants.: — Cryplomeria 

 japonica, Abies firma, Chamaecyparis obtusa, Rhododendron sinense, Quercus 

 glandidifcra, Fagus japonica, Carpinus japonica, 0. yedoensis, and Alnus 

 Jirma. But it is highly probable that, like other green parasites, BucMeya 

 attacks many other plants in nature as was the case in my culture. 



December, 1900. 



Botanical Laboratory, Science College, 

 Imperial University, Tokyo. 



Observations on the Flora of Japan. 



{Continued from p. 36.) 



By 

 T. Makino, 



Assistant in the Botanical Institute, Science 

 College, Imperial University of Tokyo. 



Sedum (Telephium) viride Makino Kev. of some Jap. Sp. of Sedum 

 and Cotyledon, in Bot. Mag., Tokyo, XI, 1897, p. 430. 



Perennial, glabrous. Stem slender, erect, or ascending, attaining 

 about 40 cm. or more in height, terete, internodes longer or shorter than 

 the leaves and about 3J-6J cm. long. Leaves mostly opposite, or sometimes 

 3-verticillate,- spreading, green, sometimes dispersedly nigro-punctate, elliptical, 

 2J- nearly 5 cm. long, 1^-3 cm. wide, obtuse at the both ends, more or less 



