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Key to seedlings on Fertility/Germination Page
by Bob Harms
The one seedling from a plant that would key out to B. trifoliolata, T23 (a suspected hybrid) is B in the Aug. 11 set and E in the Sep. 22 set. The others are from clear hybrids (indicated with an 'H' prefix).
1-Year Seedlings from T23 and Selected Hybrids
The following table gives some idea of c. 7 weeks growth during late summer. No hybrid seedlings had produced more than 3 leaflets per leaf. Only one plant, from H4, had produced a few stalked terminal leaflets in late September, the sole feature that would rule out nonhybrid B. trifoliolata status. The asymmetrically bifoliolate leaves of T23, H8 and H11 appear to be normal heteroblastic forms among juvenile Berberis plants and do not indicate hybridization. Initial leaves are always unifoliate.
| | Aug. 11 | Sep. 22 |
| T23 |
 |
 |
| H2 |
 |
— — — |
| H4 | 
 |
| H6 |
 |
 |
| H8 |
 |
 |
| H11 |
 |
 |