Longitudinal Cuts of Mature Sized Carpels
by Bob Harms
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| B. swaseyi | B. trifoliolata |
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| Hybrid H1 (B. trifoliolata type dorsal trace) | Hybrid H12 (B. swaseyi type dorsal trace) |
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| B. swaseyi | B. trifoliolata |
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| Hybrid H1 (B. trifoliolata type dorsal trace) | Hybrid H12 (B. swaseyi type dorsal trace) |