The tobacco mosaic virus (TMV) is a virus that infects plants causing a characteristic mottling and discolouration of the leaves (hence its name). Normally TMV in euphorbias has little effect on the growth of the plant, aside from the typically discoloured or sometimes distorted leaves, and the plants can survive a long time. As the plant sap contains the infectious virus, there is a danger of passing it to other plants, and so infected plants are best removed from the collection.

Tobacco mosic virus
Euphorbia viguierei	Euphorbia bupleurifolia