340 BOTANICAL GAZETTE [MAY 
gamete to the cytoplasm of the egg at the time of fertilization. 
This assumption is directly contradictory to that of CORRENS. 
Baovr further assumes that there are present in these plants two 
kinds of plastids, green and colorless ones, which are permanent 
cell organs and are sorted out and unequally distributed to daughter 
cells during somatic mitoses. Thus there results a segregation of 
green and colorless plastids in different parts of the plant, and this 
is held to account for the absence of chlorophyll in certain regions 
of the plant. Baur (4) later reported similar cases in a strain of 
Antirrhinum majus albomaculatum and in Aquilegia vulgaris. 
Additional evidence has been furnished by IkENo (36), who has 
worked with variegated races of Capsicum annuum and obtained 
results similar to those of Baur in Pelargonium. Such strains of 
Capsicum, however, differ from Pelargonium zonale albomarginata 
in that all the plants produced show some degree of variegation, 
although green branches may occur. Furthermore, when pollen 
is taken from flowers on either variegated or green branches of a 
variegated strain and used to pollinate flowers on normal green 
plants, the resulting progeny are always variegated, although to a 
less degree than in the variegated parents. IKENO believes that 
this character is not controlled by the nucleus, but by plastids 
(diseased or normal) which are transmitted from one generation to 
the next by both parents. An apparently significant fact in this 
connection is that the two types of hereditary transmission, 
maternal and biparental, have not been found to occur in the same 
species. It is possible that this may mean that male cytoplasm 
regularly enters the egg in some species and not in others; but 
adequate cytological evidence for this is lacking. 
Maize.—Numerous cases of chlorophyll inheritance have been 
reported in maize. Many distinct types have been described 
which differ greatly, not only in the mode of their inheritance, 
but also in the amount of chlorophyll present and the distribution 
and appearance of the pigment during the growth period. EMERSON 
(20) described several chlorophyll types, and presented evidence 
to show that albino seedlings conform to a Mendelian type of 
inheritance, and that the factor concerned is a simple Mendelian 
recessive. GERNERT (22) presented similar evidence. MuLEs (47) 
