8. Ikkno 57 



diaoem them in species- hybrids of Autirrhinutn iind Dianthxis, which 

 were studiiHi in detail fnun the Htiind|H)iiit of iiuMlem >(i*nftic Mciciicv, 

 though there were some ran* exceptions in the former ^enus. It is 

 ver)* likely thiit in siirh ruses u ^n/iit iiumlMT nf fju't^)rs are nuKUTiHKl 

 in the development of each character, and conH«Mnn«ntly a coui))lex 

 Si'gre^tion takes place in F«, though it is e<)ually undeniahle that 

 Ihis Si»Krej^tion may Ih' suhject to some law other than Mrndrlian, 

 hitherto unknown t^) ns. 



The plants arising; lus the result.s nf the hybrid isiition d«»rje in IJMO 

 between ^'. m»///i*/*errKs' % xS. uvacxlistyla ^ were real hybrids, but those 

 pnxluciHl fmm the hybridisation dune in l!)ll Ix'tween the s.ime male 

 and female tn»es were the so-GdK'd "falsi' hybrids" of purely maternal 

 type because they were nothing but N. innltinervis. They have not yet 

 been prove<i to breed true, though this is probable. All false hybri»ls 

 thus obtaineil were of one sex, namely female. Cytological investigations 

 are necessarj- heiv. 



In conclusion, 1 wish to thank Mr S. Xohara, Mr Y. Tanihara and 

 Mr M. Ando, who were ver\' helpful to me during the present investi- 

 gation. 



EXPLANATION OF PLATE I. 



Some of tlie figures are photographs by Dr Koininami, to whom my thanks are due. 

 All slightly reduced from natural size. 



Fig. 1. Salix (jraciliMijla. Above d" , below ? . 



Fig. 2. Sail J iiiiiltiuervis. Above (^ , below ? . 



Fig. 3. Multinervig x gracilistyla i*', , G-type. Left s , riglit ? . 



Fig. 4. Multivervig \ pracilistyla /•'] , J/-type. Left d" , right 9 . 



Fig. 5. Mutant (?) arising from the fertili.sation .y-tyjx^ x r;.type. Above d , Inflow ? . 



