Dyeing Properties of Lichens. 393 
Lecidea elata Psora ceruleo-nigricans 
flavo-virens Ramalina fraxinea 
_ geographica polymorpha 
_ Lepraria eruginosa v. latebrarum pollinaria 
chlorina Scyphophorus endiveefolius 
Parmelia conoplea Squamaria Clementi 
ceesia crassa 
physodes Stereocaulon alpinum 
pulverulenta pileatum 
speciosa tomentosum 
stellaris v. majus 
-Pertusaria communis Usnea florida 
fallax plicata 
In many, if not most of the above, the colour is due to the chloro- 
phyll contained in the thalline gonidia. 
TABLE XVI. 
The following were subjected in quantity to ammonacal maceration, 
and yielded very poor tints. 
Name of Lichen. Colour produced. 
Alectoria jubata Brown-yellow 
Borrera ciliaris am 
tenella Brown 
Cetraria nivalis Brown-yellow 
Cladonia rangiferina ira 
Gyrophora cylindrica | Brown-red 
; pellita cate 
Lecidea icmadophila Red-brown 
Parmelia parietina Green-yellow 
Peltidea canina Brown-yellow 
Scyphophorus cocciferus Brown-red 
pyxidatus 
Spherophoron compressum 
coralloides 
v. fragile ae 
Stereocaulon paschale Brown-yellow 
tomentosum 
Usnea plicata 
In the above, nearly the same colour was developed by simple 
maceration in water or by boiling, and depends on the cell-contents 
of the cortical layer. of the thallus of the plants. The colouring 
matters, which exist ready formed in the thallus, bear no resem- 
blance to the colorific colourless principles which are capable, under 
certain chemical reactions, of yielding coloured substances. 
