106 ALTERATION OP POSITION. 



wild celery and other UmbellifercB} I have also met 

 with it in Trifolium repens, in the umbellate variety of 

 the common primrose, and in the scarlet geranium. 

 Engelmann cites it in Ih^iticum repens, Roeper in Eu- 

 phorbia palustris} 



Lateral foliar prolification of the inflorescence is of more com- 

 mon occurrence than the preceding. I have met with 

 it, amongst other plants, frequently in Brassica oleracea. 

 Pelargonium zonale^ Scabiosa, Bellis, and many other 

 composites, also in Leguminosw, e.g. Idipinus, Trifolium, 

 Coronilla, &c. Prof. Oliver forwarded me a specimen 

 of Euphorbia genieulata in which, in addition to other 

 changes, there was a series of stalked buds bearing tufts 

 of green scales, but without any trace of stamens or 

 pistil; these adventitious buds occurred within the 

 ordinary involucre of the plant, between it and the 

 stamens. The pistil was unaffected in some cases, 

 while in some others it was entirely wanting, the 

 gynophore being surmounted by a cup-like involucre, 

 divided into three acutely pointed lobes, each with a 

 midrib ; these encircled a series of stalked involucels, as 

 before, and among which were scattered a few stamens, 

 some perfect, others partially frondescent. 



In a specimen of Scrophularia nodosa examined by 

 me one of the lateral buds on each of the cymes was 

 represented, not by a flower, but by a tuft of leaves, 

 the other buds being unchanged. As the inflorescence 

 was much contracted in size, the appearance of the 

 whole plant was greatly changed. 



Many of the instances of so-called viviparous plants, 

 e.g.i Polygonum mviparumt msLy be cited under this 

 head.' Many species of Allium^ Lilium, Saxifragay 

 Begonia, Achimenes, normally produce leaf-buds or bulbs 

 in the inflorescence ; so, too, leafy shoots are sometimes 



1 " Umbellati dum proUficantur, angent umbellulam, ut ex umbeUiUa 

 $implici altera exeat." ' Linn. Phil. Bot.,' 124. 



' En. Euphorb.,' p. 36. 



3 Meisner, ' Mon. Gen. Polygoni Prodrom.,' p. 20, tab. v, considers the 

 bulbils of this plant to be momfications of the pedicels of the flower. 



