Half Races with Heritable Fasciation. 
505 
Acacia, SalLv purpurea, SalLv alba, Spiraea callosa afro- 
pur pur ca. Moreover I have obtained, by the kindness 
of Prof. W. JOHANNSEN of Copenhagen, beautiful broad 
Fig. 113. Helianthus tubcrosns. A fasciated stem which is 
split into two almost equal fork-branches b and c, at the 
node marked a. From the fork there arise two leaves d 
the mid-ribs of which have fused along their dorsal side. 1 
fasciations of the underground stems or runners of Spi- 
raea sorbifolia from the nursery of Mr. ZEINER LASSEN 
in Helsingor. Instances of the same fasciations have 
1 1 have also observed this remarkable occurrence of fusing by 
the backs in leaves in the forks of split twigs, in Robinia Pseud- 
Acacia and Evonymus japonica (PRINGSHEIM, Jahrb. f. wiss. Bpt., 
XXIII, p. 81) and also in Collinsia heterophylla (1892), Epilobium 
hirsutum (1892), Echium vulgare (1892), Chrysanthemum segetum 
(1892), AgrostenimaGithago (1892 and 1894), Acer Pseudo-Platanus 
(1891), Crepis biennis (1893), Amarantus speciosus (1894), Mercu- 
rialis annua (1894) and Lamiuui purpureum (1895). 
