PLATE II. 



Fig. I. Lemna vtiiioi-, Linn. Plant natural size, and with flower and fruit en- 

 larged to show reduced types of floral organs. (After Bentham and 

 Hooker, "British Flora," 1865, fig. 939.) /. =pislil; j-/. =£lamen; 

 sp. = spathe ; s/i. — sheath. 



Fig. 2. Plu-agmites cenutgensis , A. Br. (After Lesquereux, ?'6id., pi. viii. figs. I, 

 2.) Tertiary, Golden Canon City, N. America, 



Fig. 3. Stages in the development of the embryo of Capsella bursa pastoris. 

 jr/. =suspensor ; f^/. = cotyledon ; ^. = hypophysis ; /.= plumule; to 

 show division of cells in suspensor for comparison with epibasal quad- 

 rants in Jungermanniese. (After Strasburger, " A Text-book of 

 Botany," 1903, fig. 399.) 



Fig. 4. Aritndo goepperti, ? Miinst. (After Lesquereux, ibid., pi. viii. fig. 3.) 

 Tertiary, Golden River, N. America. 



