From what has been said of the nature of Griffith's work on the ovules, both of Angiosperms and Gymnosperms, the complete omission of his name in recent works on the two groups that are in constant use is at least noteworthy. Griffith was specially interested in the study of Cryptogamic plants. In a letter to Wight he says "I would like to be out with a work on Indian Cryptogamia of higher forms; so much so that if I see no chance of my succeeding to the Gardens, I intend sending away all my other collections, and devoting myself to this object and general development, which is obviously the keystone of the arch." He left Algae and Fungi (with the exception of the Characeae) alone, and it is his work on the Bryophyta and Pteridophyta that concerns us. For information on his views on these plants we are dependent on his paper on _Salvinia_ and _Azolla_ and on the _Notulae_, put together as I have said from his notes after his death, and not intended for publication in this form. But there is no difficulty in getting a clear grasp of his point of view. This was a mistaken one--an attempt to bring into line the reproduction of the gametophyte of Bryophytes, the sporophyte of Vascular Cryptogams, and the flowering plant with its flower and fruit. It is easy to be wise after the event. In these comparisons Griffith belonged to his time with a much wider field of personal observation than most possessed. [Illustration: _Plate XVI_ From Griffith's _Notulae_ Median section of the ovule of Cycas Nucellar apex of Cycas with pollen chamber and pollen grains] We must bear in mind that at the time when Griffith worked no idea of the sexual and asexual alternating generations in Pteridophytes had been gained, although the prothallia had been observed preceding the growth of the plant in _Equisetum_ and Ferns. It was not till some years after Griffith's death that fuller facts as to the sexual organs were obtained and led to the right comparisons. Griffith's work on the Bryophyta shows the same power of observation as that on the ovule, but the difficulties due to imperfect instruments are more evident. His views on reproduction were here, however, clear, since the development of the capsule was definitely related to the fertilisation of the pistilla (archegonia) by the substance formed in the anthers. His figures indicate how much he saw, and how here also he sought in development the interpretation of mature structure. His early interest in the Liverworts, especially the Marchantiaceae, continued, and all the forms he collected were carefully examined and figured with his usual accuracy.