A GENETIC0-PHYSI0L9GICAL STUDY ON THE FORMATION ETC. 
27 
Name of plant 
Part examined 
Chromogen 
P F 
Remarks 
Narcissus sp. 
Lf. 
— 
VI— 
»♦ 
Perigone 
— 
11+ 
Yellow colour 
99 
Corolla 
— 
11+ 
Pale yellow 
Dioscoreaceæ 
Bioscorea Batata 
Rhizome Peri. 
VI 
+ 
The skin brown. 
99 99 
„ Int. 
V 
— 
White tissue. 
Iridaceæ 
Belamcanda punctata 
Fruit 
VI 
— 
Green fruit, black 
when ripe. 
Bromeliaceæ 
Ananas sativus 
Fruit Peri. 
lib 
II 
99 99 
,, Int. 
x(Y) 
II 
Commelinaceæ 
Commelina communis 
Seed 
VI 
+ 
Unripe seed, brown 
when ripe. 
Gramineæ 
Agrostis vulgaris 
Arena sativa 
Lf. & culm. 
— 
VI + > 
“ Tresspass ” 
9 > 99 
— 
IV 
“ Kohnoen ” 
9 9 99 
— 
IV 
“ Race Horse ” 
99 99 
— 
IV 
“ Hadaka ” 
■ 9 99 
— 
rv T 
Dadylis glomerata 
Hordeum lulgare 
99 99 
-f- 
IV 
Spring barley A 
•9 99 
— 
IV 
„ B 
99 99 
— 
IV 
„ „ c 
99 99 
— 
IV 
Winter barley A 
99 99 
— 
V 
» » B 
99 99 
+ 
IV 
V „ C 
IV 
“ Golden Melon ” 
99 99 
— 
IV 
Triticum 
“ Gypsy ” 
99 99 
— 
IV + 
“Red Wave” 
99 99 
— 
IV+ 
“ Silver Sheef Longlessy ” 
99 99 
— 
IV+ 
1. The reduction colour of the extract of most of the grasses examined is tinged with 
orange red hence the colour can be matched better with the scales which are made by the reduced 
solution of apigenin or luteolin. 
