TABLE I. CHARACTERISTICS OF THE PREHISTORIC MAIZE OF BAT CAVE 
COMPARED BY STRATA 
Stratum 
Characteristics I II III IV Vv VI 
No. of separate lots : 4 8 6 8 24 
Total No. of cobs 25 55 77 146 118 345 
No. cobs scored 19 23 38 15 78 238 
No. cobs intact in length 4 2 5 13 i7 25 
Length intact cobs —em. max. 9.5 10:8. -8.5.- 18.8. -45 16.5 
sie “se “© min. 6 7.2 6.5 5.1 5 4. 
iy oe is ** mean 7.3 8.4 7.7 8.5 9. 9.3 
Mean diameter of rachis mm. ind 8.6 7.9 8.4 9, 11.2 
e “cob 148 O° {57-096 8.9 168-617 17.5 
Index cob/rachis—max. 2.5 3 2.8 2.6 2. 2.8 
eo ee Ss min. 1.6 15 1.4 1.2 Ls 1.2 
er oi mean 1.9 oe ane 1.9 i 1.6 
Rows of grain-——max. 14. 16 16 20 16 20 
Pee, se sein. 8 8 8 4 8 4 
ee eé ee ae 
mean 10.7 12 11,2 12 | 11.4 
Rachis tissue 9% spongy 28 88 58 43 29 38 
ss 7 * horny [ke 12 39 39 28 24 
ia st * bony 3 18 43 38 
Surface of cupules % glabrous 19 4 8 8 8 aes 
i Pe Raa ** hispid 3 13 25 15 
ae i ** hirsute 81 96 89 79 67 63 
, Texture 9% fleshy 97 91 71 56 25 40 
= ** horny 3 9 26 36 18 Zi 
8 me bony 3 8 oT 39 
me Surface ** glabrous 100 96 95 79 92 85 
= ** hairy + 5 21 8 15 
° 
a Venation * slight 10 44 18 5 6 16 
* none 90 56-82 9 94 84. 
Shape % boat 20 13 16 12 7 8 
** intermed. 80 61 47 59 38 49 
** collar 26 «87 29 55 43 
% Texture ‘* chaffy 100 48 47 61 37 49 
= * fleshy 5258 39 59 48 
oe 
S horny 4 3 
2 Surface ** clabrous 100 96 89 71 74 78 
ee . . 
a hispid 3 8 3 3 
a “* hairy 4 8 21 23 19 
Venation ‘* strong 30 30 29 56 21 26 
‘““intermed. 53 26 55 28 41 43 
** none 17 44 16 16 38 31 
Tunicate alleles % tu 1 
a nm ** tuw 8 1 33 55 
sc AS ** «toa 80 92 82 73 61 4.2 
ab a ** tuh 20 8 10 26 5 3 
Teosinte introgression 9% none 100* 100f 73 43 9 27 
ca i % intermed. 29 52 58 61 
ie _ % strong 3 5 oS 12 
Total No. 2 Q 10 20 67 24 
, Av. length 1/1000in. 275 298 280 812 3802 3816 
7 Av. thickness SS 198 247 228 210 236 217 
4 = Width max. 1/1000in. 258 301 340 376 398 428 
‘© min. re BBO 229 218 «214 = 197 ~~ 201 
‘* mean “eS 844 265 265 284 308 338 
* There is one cob with a cob/rachis index of 1.2 which also shows evidence 
of strong introgression of teosinte. Since this cob is atypical of the stratum in 
other characteristics as well it is undoubtedly an intrusion and is not included in 
this datum. 
{ There is one cob in this stratum which shows unmistakable teosinte intro- 
gression but which is atypical in other respects and is probably an intrusion. 
