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THE AMERICAN NATURALIST [Vol. XLV 



5. Flowers.— Small (Figs. 3 and 5). Petals about 1.3 

 cm. long. Lower halves of stigma lobes (when closed) 

 below the tips of the anthers. 



6. Capsules.— Gradually narrowing from the base, 2- 

 2.5 cm. long. 



7. Seeds. — Light brown. Those developed in the 

 ovary of biennis after pol- 

 lination by grandi flora 

 are similar to the female 

 parent. 



The most striking pecu- 

 liarities of strains A and 

 B in comparison with cer- 

 tain other American types 

 of biennis are:— the small 

 flowers, green stems, and 

 the absence of that red 

 coloration in the papillate 

 glands which is seen in 

 some forms of the species 

 and is conspicuous in La- 



Since differentiating the 

 strains A and B in 1908, 

 I have had an opportunity 

 of observing somewhat 

 extensively various forms 

 of biennis in the vicin- 

 ity of Boston, where 

 the prevailing type has 

 larger flowers, frequently 

 a broader leaf, and usually 

 ;ate with red tinted glands. There is con- 

 triation in the characters above mentioned 

 this year selected certain plants growing 

 grounds of the Bussey Institution that in 

 ;ts are likely to prove much more satisfac- 

 purposes than the strains A and B. These 



