Abstract
Variations in some morphological characters of Miscanthus sinensis ANDERSSON, M. sinensis var. condensatus MAKINO and M. sinensis form. gracillimus OHWI were studied in 1955. 1. Length of the leaf blade in M. sinensis and wild M. sinensis var. condensatus ranged from 47cm to 98cm and from 48cm to 87cm respectively. Breadth of the leaf blade in M. sinensis, its variety and form are 1.0-2.7cm, 1.1-3.1cm and 0.4-1.5cm respectively. Especially, cultivated varieties of M. sinensis var. condensatus are so wide as 3.1-4.2cm (Figs. 1 and 2). 2. Length of the culm and the ear in M. sinensis is generally larger than that of the varieties (Fig. 3). 3. Bush-type of these grasses may be classified into three types according to an index given by the formula T=D-D'/H (T=index of the bush-type; D=diameter of the maximum spread at the top of the bush; D'=diameter at the base of the bush; H=height), i.e. erect type (T<1), decumbent type (1<T<2) and prostrate type (T>2) as shown in Fig. 5. Most individuals of M. sinensis grasses belong to erect type, and its variety is either prostrate type or decumbent type (Fig. 4), but the grasses grown at sea cliff show extremely prostrate type. This type is regarded as edaphic ecotype by TURESSON (1925). 4. In this report the writers recognized the continuous variation in these morphological characters.
