Anomalous Endosperm Development in Maize and the Problem of Bud Sports. 245 



rare — East (8) found six examples among 60000 seeds — and Collins (2) 

 eight in 100000 — and cases of bud sports are perhaps equally rare, 

 unless we include variegation in the categorv of bud variation as I 



Fig. 1. Maize seeds illustrating anomalous endosperm. Numbers 1 — ö are the parents 

 and i\ of a cross between a white, starchy type (1) and a white, sugary type (3). 

 The Fj seeds were, as expected, all purple, starchy (2), except two anomalous seeds, 

 one purple -white, starchy (4) and one purple, starchy -sugary (ö). Numbers 6 — 8 are 

 anomalous seeds of a white type cross-pollinated by a plant that was heterozygous for 

 both red and purple aleurone. The Fj seeds consisted of purples, reds, and whites as 

 expected, except for one purple -red seed (6), one purple -white seed (7), and one red- 

 white seed (8). Photographs taken with a Cramer isochromatic plate and green contrast 

 screen, except seed number 6 for which a Cramer spectrum plate and red contrast screen 

 was used. Approximately X 2. 



have recently done (Emerson (10)). Fortunately, however, genetic 

 evidence, particularly in case of anomalous endosperm formation, is more 

 easuy secured and is, probably, when we have learned to interpret it, 



