20 



BURSA BURSA-PASTORIS AND BURSA HEEGERI 



Fig. 11. Fig. 9. 



Fig. 10. 



FIG. V.Sursa bnrsa-pastoris tennis from my first pure culture of this biotype. 



FIG. 10. Bursa bursa-pastoris tennis from a hybrid progeny. 



FIG. \\.-Bursa bursa-pastoris tennis. A stunted sib of plant shown in fig. 9. 



