SCIENTIFIC COMMITTEE. 
CXXX111 
Variations in Tropaeolum. —Col. H. E. Rawson, C.B., showed 
further specimens of Tropaeolum majus exhibiting suppression of 
parts, which he attributed to alterations in light during growth. 
Spiral torsion in Gentiana Pneumonanthe. — Mr. Bowles showed 
a spirally contorted specimen of Gentiana Pneumonanthe from a field 
near Myddelton House for comparison with the Mint shown at the 
last meeting. A specimen of Gentiana Asclepiadea showing similar 
torsion had already been before the Committee. 
Variation in Carduus lanceolatus and C. palustris. — He also showed 
a white-flowered Spear Thistle in which the flowers were slightly tinged 
with pink, and purple, flesh-coloured, and white-flowered specimens 
of Carduus palustris, all from near his house. 
Hybrid Romneya Coulteri and R. trichocalyx. — Mr. V/. H. B. 
Fletcher, of Aldwick Manor, Bognor, sent specimens of R. Coulteri, 
R. trichocalyx, and a hybrid he had raised between them, with the 
following note :• — " It will be noticed that the buds of the hybrids are 
intermediate, having traces of the bristly hairs of R. trichocalyx and 
the more egg-shaped form and especially the apiculate sepals of 
Coulteri. When the plants are seen in a row, as at my brother's vicarage 
garden near Chichester, the tint of the foliage of the cross-breds 
differs greatly from that of R. Coulteri. 
" So far as my experience goes, the Romneyas do not set seed 
unless artificially cross-pollinated. I have grown R. Coulteri for 
between twenty and thirty years, but never had any fruit set until in 
1913 I was able to use the pollen of R. trichocalyx for the first time. 
The flowers which are cross-pollinated bear fruit with the utmost 
freedom. Though the two forms are with me planted in actual 
contact, neither insect nor wind has the slightest effect in crossing 
them. I find R. trichocalyx to produce pollen very freely, but R. 
Coulteri much more sparingly/' 
Agapanthus crosses. — Mr. Fletcher also sent Agapanthus Mooreanus 
2 X A . umbellatus and A . Mooreanus £ X A . umbellatus (deciduous 
white form) Mr. Fletcher has also raised the reciprocal of the last. 
The hybrids seemed to be extremely floriferous and had good flowers, 
which varied considerably in colour (as do those of the form known as 
A. intermedins), some forms with golden anthers being particularly 
pretty. 
Foxglove with dialysis of corolla. — Mr. Whitton sent a specimen of 
Foxglove with the corolla deeply divided into four or five parts. This 
phenomenon is not very uncommon in plants with gamopetalous 
* corollas, such as Campanulas and the like. 
Bi-coloured Marrow.* — Mr. H. L. Bassett, of Anerley, sent a vegetable 
marrow in which one half was yellow and the other green, the line of 
demarcation being very sharp. Mr. Bassett wrote that the seed parent 
was white, and thought it possible that it may have been crossed with 
a green marrow growing near in 1915. 
