IQI5 BARTLETT—MUTATION IN QENOTHERA 103 
2A Leaps CL eee 
10 CIN) — 
| ne 
Fic. 10.—F, progeny of Oenothera pratincola mut. nummularia, Lexington C-21; 
the 2 upper — Le aie C-21-8 and C-21—15, are mut. fortuosa; the 2 in the 
middle row, C-21-13 and C-21-16, are mut. rubricentra; the 2 below are mut. num- 
mularia; the saith tes in this cut are three weeks older pie those shown in fig. 9. 
