BIOTYPES AND HYBRIDS. 



15 



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Fig. 4. Fig. 5. 



Fig. 4:.— Bursa bursa-fiastoris heteris. Typical specimen from offspring of plant 

 shown in fig. 3. 



Fig. 5. — Bursa bursa-pastoris heteris. Offspring of sib of plant shown in fig. 4. 



