lxiv PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 
SCIENTIFIC COMMITTEE. 
July 26, 192 1. 
Mr. E. A. Bowles, M.A., in the Chair, and four members, with Mr. 
Allwood (visitor), present. 
Hybrid Dianthus. — Mr. Allwood showed some crosses between the perpetual- 
flowering Carnation and the Sweet William ; these and the second generation 
had mainly grey foliage and clustered flowers on tall stems ; they appear to 
be sterile to their own pollen, but set seed freely with that of D. barbatus. They 
are readily propogated by cuttings. 
Mr. Allwood said that Carnations and Sweet Williams have been crossed 
before, but the perpetual-flowering Carnation had not been used. 
Injurious insects. — Mr. Fraser showed examples of Cetonia aurata, and of 
Sir ex gigas. 
Figure of Banana. — Mr. Fawcett showed a tracing of Banana made from an 
illustration dated 161 8, in which the plant had the form of an apple tree — showing 
that it was not certainly known to botanists at that date. 
Botanical Certificates. — At the instance of the Floral Committee, Botanical 
Certificates were recommended to two remarkable congested forms of Scolopen- 
drium vulgare sent by Mr. Bolton of Halstead, viz. undulatvim cristatum and 
undulatum muricatum. 
Flowering of Koelreuteria paniculata. — -Mr. Hales sent inflorescences of 
Koelreuteria paniculata from the garden at Chelsea. It had not flowered since 
191 1, when it set seed. 
Alectorurus yedoensis was shown in flower from Mr. Bowles' garden — a rare 
Japanese Liliaceous plant. 
Twin Apples. — From Mr. Bedford of Gunnersbury came several examples 
of twin fruits (connate fruits derived from separate flowers, sometimes with 
separate stalks) of the variety Potts' Seedling. 
Crinum yemense. — Mr. Elwes showed specimens of a fine plant under the 
name Crinum yemense Hort.. with the following note: "This plant has been 
known in our gardens since 1893, when W. W. in the Gardener' s Chronicle 
for June 3, 1893, p. 658, wrote of it — ' This was distributed as a new plant 
by Dammann & Co., Naples, last year. It has lately flowered at Kew and has 
been identified by Mr. Baker as Crinum latifolium Linn., a common species in 
Tropical Asia, and well known in English gardens.' I can find nothing more 
recorded of it. Hooker in the Flora of British India, vi. p. 283, unites many 
other described species with latifolium, and gives it a wide distribution in Tropical 
Asia and Africa. After comparing my plant, now in flower, with the figure 
in Bot. Reg. t. 1297, which is referred by Baker to C. latifolium, stated 
by Roxburgh to be a native of Bengal, I am confident that Baker was mistaken, 
and that though the species of Crinum are extremely hard to define by any 
fixed characters, as Hooker remarks, yet it is for horticultural purposes a very 
distinct species. I presume from its name that the plant is a native of Yemen 
in Arabia, and probably from the high mountains of the interior, as it proves 
so hardy in the open air that it ripened seed at Colesborne in the wet cold season 
of 1920. Sir Frederick Moore, who has grown it outside for some years at 
Glasnevin, considers it, as I do, the best hardy Crinum in cultivation." For 
comparison Mr. Elwes showed Crinum X Powelli album, the S. African 
C. Moorei, and a dwarf form of C. longifolium (capense), the flowers of which 
resemble very closely the plate of C. latifolium in Bot. Reg. t. 1297. 
Scientific Committee, August 9, 192 1. 
Mr. E. A. Bowles in the Chair and eight members present. 
Perpetual Carnation X Sweet William. — Mr. Chittenden said he had been 
unable to discover any very definite accounts in old literature of the raising of 
hybrids between these two plants, beyond the one to which Mr. Allwood referred 
when he showed at the last meeting those he had raised. The Committee would 
welcome any such accounts. 
