SCIENTIFIC COMMITTEE, DECEMBER 18. 
clxxxi 
in his paper on " The Effects of Urban Fog upon Cultivated Plants " 
{Journ. R.H.S., xvi. p. 1) showed the extremely poisonous nature of such 
vaporised products ; there would thus seem to be ample cause of injurious 
influence upon the trees, apart from the want of freedom in root 
production. 
Double Cyclamen. — Dr. Masters reported as follows upon the specimen 
sent to the last meeting from Messrs. Ker, of Liverpool : " In these 
flowers there were five sepals, five distinct petals, no stamens, but several 
rows of additional petals. The ovary was normal." 
Plants fkom Cambridge Botanic Gardens. 
Mr. K. I. Lynch forwarded the following rare and interesting species, 
for which a unanimous Vote of Thanks was passed, and to the three first 
named were awarded Botanical Certificates : — 
Kleinia pendula, with fleshy stems and scarlet heads of flowers, from 
Somaliland. The genus Kleinia is a Groundsel or Senecio with fleshy 
stems ; K. neriifolia, the ' Barode,' being a native of the Canary Islands ; 
most of the species are South African. K. pendula has a rod-like, fleshy 
stem the thickness of a pencil, from which a long pendulous peduncle 
arises at the apex. The leaves are reduced to minute prickles. 
Kalanchoe marmorata, another fleshy plant. Kalanchoe belongs to 
the Crassulaceas, is from tropical Africa, but has species in Asia and 
Brazil. It has tubular, greenish -white flowers, nearly 6 inches in length, 
and fleshy obovate leaves. 
Nematanthus longipes (Gesneraceae) has sub-fleshy lanceolate leaves, 
and long scarlet tubular flowers protruding from one side of the calyx. 
It belongs to Gesneraceae. There are only three or four species, all 
natives of Brazil. 
Phylica ericoides (Rhamnacea^), called Bruyere du Cop, is a Heath- 
like plant, with terminal clusters of minute white flowers. 
Lindenhergia grandiflora (Scrophularineae), figured in the October 
number of the Botanical Magazine, is a species with yellow flowers, and 
nearly allied to Mimulus. There are eight species in E. Africa, Arabia, 
the East Indies, and the Malay Archipelago. 
Senecio vulgaris x S. squalidus, a remarkable natural hybrid between 
these two British plants, the former being the Groundsel, and the latter 
naturalised on old walls at Oxford and elsewhere. The flowers are small 
(half an inch from tips of ray florets), with the foliage of Groundsel. It 
comes perfectly true from seed, and has commenced being a weed in 
Cambridge Botanic Gardens. It is said to grow wild with its parents 
near Cork. 
Cardamine chenopodifolia is remarkable for bearing perfect seed, both 
above and below ground. Mr. Lynch observes that he has two sets of 
plants — one always raised from seeds out of the subterranean pods, and 
another set always raised from the other seeds, in order to see whether 
in course of time any modification of habit may arise in consequence of 
growing always from seed produced in the same way. The white flowers 
are excessively minute, and are fertilised in bud, the anthers being closely 
adpressed to the globular stigma, the conditions usually prevailing with 
