mated introgression score is probably lower (closer to pure 
maize) than is really the case. Such a possibility is sug- 
gested by comparisons of cupule width and pilosity be- 
tween the tunicate and non-tunicate cobs (Tables LV 
and IX). 
Tasie IX. Certain internal characters of tunicate-like cobs from Richards’ 
Caves maize. 
. ra Cupule Glume Rachis G/R 
Cob No. Introgression’ Pilosity Width(mm.) Length(mm.) Diameter(mm.) Ratio 
104 2 3 8.0 9 12 075 
62 2 3 10.0 7 17 4] 
59 2 1 8.0 6 9 .66 
598 2 1 9.0 5 1] 245 
319 3 0) 12.0 5 12 242 
798 2 1 
7.0 5 9 55 
' Grade-5 is most tripsacoid 
? Grade-5 shows strongest pubescence 
Other Maize Remains 
Richards’ Caves. The twenty-two tassel fragments in 
this collection are not particularly significant in relation 
to teosinte introgression. The husk fragments (seventy- 
seven in number) are characteristic of Tripsacoid maize 
in that they are hispidulous (beset with minute epider- 
mal bristles). Tripsacoid characteristics of fourteen culm 
fragments include a prominent, lignified rind and numer- 
ous vascular bundles. The shanks (thirty-six in number) 
are similar to the culm fragments in lignification. They 
are also rather uniform in length (5 to 7 cm.), although 
there is considerable variation in diameter (0.5 to 8.0 cm. ) 
and in their having from six to ten nodes. This lot also 
yielded seven boluses, consisting of wadded and some- 
times chewed grass leaves, probably from maize or its 
relatives. 
[ 116 | 
