aon WEATHERWAX: THE EVOLUTION OF MAIZE 
and the development of no part shows any significant difference 
except for the indurated outer glume. The silk has much the 
same structure as in maize, but it is shorter. 
Because of the large number of inflorescences, the flowering 
period of a teosinte plant is much longer than that of a maize 
plant, and the chances for self-pollination are better. When the 
cae § 
Fic m of a longitudinal section of an internode and its spikelet in 
the pits erat of Euchlaena or Tripsacum. = saving I, internode; GG, glumes; 
LL, lemmae; PP, paleae; S, rudimentary s' F, rudimentary flower; ste 
functional pistil; Sp, position of the ties ae which does not appea 
Fi 
in a median section. G, 28. The rudimentary spikelet shown in the racine 
rectangle in Fic, 27. 
seeds are mature, the female spike separates at the nodes, each 
internode bearing a spikelet and its enclosed fruit. 
Mixed inflorescences.—The homologies suggested between the 
male and female inflorescences are further indicated by the occur- 
rence of mixed inflorescences. In male tassels, functional female 
spikelets have several times been observed near the base of one 
or more of the branches; and the sterile tip of the female spike, 
as in maize, is often replaced by a short staminate portion (FIG. 29). 
Some single spikes are so much like those of Tripsacum, to be 
described later, that it would be hard to determine whether it is 
a case of male spikelets being in a female inflorescence, or vice 
versa, In such a mixed spike, each male spikelet is usually 
