Table 1.

Frequencies of chimeric shoot shifts for the cultivars studied

	Stem fate
Cultivar	Wild type → wild type	Wild type → mutant	Probability of fitting a 2 : 1 ratio
S. japonica ‘Normandii’	9	20	<0·001
S. japonica ‘Gold Flame’*	1	49	<0·001
S. japonica ‘Gold Flame’†	19	57	<0·05
S. japonica ‘Anthony Waterer†	6	80	<0·001
Mentha suaveolens ‘Variegata’	1	12	<0·0001
Euonymus japonica ‘Silver King’	1	14	<0·00001
Σ	37 (0·137)	232 (0·862)

* From Corvallis; ^† from Milwaukee; ^‡ from Louisville.