﻿Stout: The Origin of Dwarf Plants 435 



beyond the label stake in the rear. The intermediate plant in 

 Series VIII just mentioned is shown at point a. To the right in 

 the foreground are hybrids between No. 2 and a plant of 

 Hibiscus Moscheutos, and to the left are hybrids between two 

 types of H. Moscheutos, all of the same age as the dwarf plants. 



Series IX. The thirty-four plants of this series were grown 

 from the selfed seed of one capsule of plant No. 5 of Series I. The 

 parent was a robust plant. Thirty-three of the plants were of 

 the robust type quite uniformly like the one of this series shown 

 on Plate 26. One plant was classed as an intermediate; it was 

 smaller than the others, its leaves were somewhat crinkled, but 

 it was not branched from the base. Twelve plants produced 

 flowers; ten of these were typical H. ociiUroseus, one had flowers 

 with slight pink coloration outside the eye, and on one plant the 

 flowers were quite pink outside the eye, quite like the flowers 

 produced by hybrids between H. oculiroseus and the pink-flower 

 type of H. Moscheutos. 



Nearly all the plants of these three Series (VII, VIII and IX) 

 lived through the winter of 1 914-15 and were grown during the 

 summer of 1915 in the same beds as in the previous year. In the 

 second year of growth several main stems, usually three to five, 

 are produced by the single cluster of roots belonging to a plant. 

 As the plants were grown about 30 cm. apart they were much 

 crowded in the second year, which is a condition that does not 

 favor the development of secondary branches and hence the 

 plants were much less bushy than in the first year of growth. 

 Under these conditions there were fewer differences between 

 plants previously classed as intermediate and dwarf. 



In 1915 the plants of Series VII ranged from 1.25 m. to 1.6 m. in 

 height with the exception of the plant classed as robust which was 

 2.08 m. tall but which from the character of its flowers appears to 

 be an accidental hybrid. Series VIII ranged from 1.3 m. to 1.6 m. 

 in height. The dwarf plant shown to the left in Plate 26 

 had four main branches and stood 1.45 m. tall and was typical 

 for the average plant; the plant shown at point a in Plate 27, 

 classed as intermediate in 1914, was of nearly the same height 

 and appearance. Series IX, described as robust in 1914, varied 



