2. Four-rowed ears have two rows of kernels on either side of the cob, the two pairs of rows being separated by smooth areas (rachis without paleae). It is necessary to distinguish between palea and rachis color as well as between these and pericarp color, all of which belong to the P allelomorphic series. Ten genotypes have been found, as follows:

Genotype
(with A)
Pericarp
color
Palea
color
Rachis
color
Prrr red red red
prrw " " white
Prwr " white red
Prww " " white
Pwrr colorless red red
Pwrw " " white
Pwwr " white red
Pwww " " white
Porr orange red red
Poww " white white

An account of this series will probably be published in Zeitschrift fur induktive Abstammungs - u. Vererbungslehre.