CXxiv PKOCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



wood-like mycelium, observing that " it grows on the wooden posts put to 

 protect visitors in the interior of Poole's Cavern, Buxton. It occurs 

 many yards inside, where no light except that of an occasional gas-jet 

 can reach it." Dr. M. C. Cooke reported upon it as follows: — "The 

 substance you send has long been known and noted under the name of 

 Ozonium aureum, and classed with fungi ; but it is only an incomplete or 

 imjDerfect stage, analogous to Rhizomorplia. It is supposed to represent 

 the mycelium of some one or more of the woody Polypori, possibly of 

 Fomes fomentarius ; this is, however, of small importance. It is an 

 incomplete fungus, and will attack living trees, especially about the roots, 

 and ultimately kill them." 



Pelarrjoniwn, Dissociation of Colours in. — Rev. W. Wilks exhibited a 

 truss from a plant which normally bears bright red-crimson flowers ; but 

 it had three blossoms of a pale pink-mauve tint, probably a reversion to 

 an ancestral parent, such as P. grand ifiorum, one of the original sources 

 of the modern composite hybrid fancy Pelargoniums. 



Podisoma on Juniper. — A branch bearing this fungus was received 

 from Ml-. W. H. Divers, Belvoir Castle. It is dimorphic, and produces 

 the other form, known as Rcestclia lacerata, on the Hawthorn. 



llosc-leaf, Discoloured. — Mr. Saunders showed leaves from a ' Marie 

 \'an Houtte ' Rose growing at Oxford. It was planted in 1899, and did 

 fairly well in 1900 ; but this year all the leaves are variegated, much 

 resembling those of the Japanese Honeysuckle. It was difficult to pro- 

 nounce as to the cause, but defective root action or something deleterious 

 in the soil was suggested as likely to produce it. 



Bose-stcm Gall. — Mr. Saunders showed a stem of Rosa rugosa with a 

 gall-like growth formed just above the level of the earth. The plant was 

 one in a Rose-hedge composed of R. rugosa and ' Aimee Vibert.' Several 

 of the plants are affected in the same way. It appears to resemble a 

 bacterial disease that attacks Raspberry-canes in the United States, known 

 as " root or crown gall," and is by some attributed to frost. The Rose 

 was grown at Micheldever, Hampshire. Mr. Worsdell undertook to 

 examine it. 



Cephalotaxus Fortunei malformed. — Mr. Worsdell exhibited drawings 

 of proliferous conditions of the female flowers of this tree. These form 

 really an inflorescence of bracts with two ovules, the latter being another 

 shoot. Both the main axis and the floral axis were proliferous. The 

 question arose as to whether this was the result of an impediment to the 

 circulation through strangulation, to which the tree was subjected, or to 

 non-pollination. 



Miltonia vexillaria. — Mr. Chapman showed a fine flowering plant, 

 remarkable for having the lateral petals marked like the labellum. It 

 had exhibited this peculiarity for eight years in succession, and plants 

 raised by offsets from it bore the same abnormal flowers. 



Tulip malformed. — Mr. O'Brien exhibited a Parrot Tulip in which the 

 bracts and outer perianth leaves were partly green and partly yellow, 

 exhibiting a not uncommon struggle between the " vegetative " and 

 "reproductive" energies. Mr. Saunders exhibited a Tulip showing a 

 bulbil in the axil of a leaf on the flower stem. 



Aroicl loitli flies. — Mr. Bowles exhibited a large- spathed Aroid, the 



