APPENDIX II. 

 LIST OF PLANTS AND MATERIALS USED FOR STUDY. 



THE part of the plant required is carefully indicated in this list ; likewise 

 the state in which it should be taken, and the period at which it can be 

 obtained. To these a few cultural notes are sometimes added. 



Where the material is to be placed in alcohol, unless the word "absolute " 

 is used, strong methylated spirit will serve, and is much cheaper. If possible 

 this should be obtained of the " old style," which is freely miscible with 

 water. 



For fixing cell-contents, the quantity of alcohol, etc., used should be at 

 least 100 times the bulk of the object. 



Stems, etc., which are much hardened in alcohol, can be rendered more 

 easy to cut by being placed for at least twenty-four hours in a mixture of 

 half-and-half alcohol and glycerine. 



Most of the Freshwater Algae here mentioned can be obtained from 

 T. Bolton, Newhall Street, Birmingham ; and Marine Algse from the Bio- 

 logical Station, Plymouth, or the Marine Biological Station, Port Erin, 

 Isle of Man. 



Messrs. Backhouse & Son, the well-known nurserymen of York, have 

 recently established on a large and complete scale a supply department for 

 all kinds of botanical materials, living and preserved, under the direction 

 of Dr. Arthur Burtt, and have undertaken to supply as far as possible all 

 materials named in this work. 



A. 



Abies. See Picea. 



Abutilon. Cork-formation in. Twigs, 182. Greenhouse shrubs. 

 Acacia. Compound pollen-grains, 391. Flowers. Fresh, or in alcohol. 

 Greenhouse shrubs, mostly flowering in spring or early summer. 

 Bastard, see Robinia. 

 Acer (Maple). Autumnal coloration of leaves, 58. Leaves in autumn. 



Fresh. 

 Aconitum Napellus (Monkshood). Structure of ovule, 398. Full-blown, 



or faded, flowers. Fresh. Summer. Hardy perennial. 

 (Other species of Aconitum will serve equally well. Most flower in 

 June, July or August.) 



(460) 



