A revision of Williamsoniella
- 10 October 1944
- journal article
- Published by The Royal Society in Philosophical Transactions of the Royal Society of London. B, Biological Sciences
- Vol. 231 (583) , 313-328
- https://doi.org/10.1098/rstb.1944.0001
Abstract
The various floral organs of Williamsoniella are redescribed from new material. It is shown that the flower possessed a perianth like that of Cycadeoidea, that the microsporophylls are pinnately branched and that the pollen is contained in two-valved capsules like those of Cycadeoidea. The seed is shown to have various internal cutinized membranes which are interpreted as indicating a free nucellus. It is concluded that Williamsoniella is nearer taxonomically to Cycadeoidea than had been realized.Keywords
This publication has 3 references indexed in Scilit:
- Wonnacottia, a new Bennettitalean MicrosporophyllAnnals of Botany, 1942
- III. On williamsoniella , a new type of bennettitalean flowerPhilosophical Transactions of the Royal Society of London. Series B, Containing Papers of a Biological Character, 1916
- III. A petrified Williamsonia from ScotlandPhilosophical Transactions of the Royal Society of London. Series B, Containing Papers of a Biological Character, 1913