CCXX PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



upon ; also a piece of the semi- decayed and highly resinous wood. The 

 name — Lign Aloe, in Greek Xylaloe — was given to the wood by Aetius, a 

 physician of Mesopotamia in the fifth century. In Latin it is lignum- 

 aloe— i.e., "Wood Aloe," from the astringent and bitter taste, resembling 

 that of the true Aloe. 



Diseased Carnations. — Dr. Cooke reported as follows upon the plants 

 sent to the last meeting by Mr. Jas. Douglas : " They are chiefly affected 

 by the rather new disease caused by Macrosporium nobile, figured in the 

 plates on Carnation diseases at page 656 ; a little mixed with Iletero- 

 sporitim echinulatum, also figured. The disease should be brought under 

 control by picking off all diseased leaves, and spraying with ammoniacal 

 copper solution. It is liable to spread rapidly from the great power of 

 reproduction that it possesses in the fertility of the spores." 



Azolla Species. — Mr. Odell observed, in reference to the plant sent 

 by Mr. Burbidge to the last meeting, that the species which is apt to 



Fig. 346. — Scolopendkidm vak. DituMMONDiiE sdperbum. [Gardeners^ Chronicle.) 



spread to a detrimental degree in ponds is Azolla pinnata, and not A. 

 filiculoides. 



Fruit-tree Roots Diseased. — Mr. Dean, of Wainsford Gardens, 

 Lymington, sent roots of Vines, Peaches, and Figs. Dr. Cooke observed 

 that they were growing in a soil with decayed vegetable matter, in which 

 mycelium of fungi occurred. This then attacks the roots of living trees, 

 and becomes parasitic upon them. When this is the case, the roots must 

 be taken up carefully and thoroughly washed, and replanted in good 

 soil. 



Scolopendrium var. — Mr. Druery exhibited a plant called S. vulgare 

 Drummondice superhum. It is remarkable for its doubly incised and very 

 fimbriated edges, and a terminal crest to the fronds. It differs from the 

 parental form, S. v. crispum Drummondice, by a greater development of 

 this fimbriate character, and an entire absence of the dimorphous 

 character seen in the original find, w^hich has smooth-edged fronds and 

 somewhat fimbriated ones intermixed. The variety shown is also more 



