10 MR. HENFREY ON THE DEVELOPMENT OF THE OVULE IN ORCHIS MORIO. 
Lastly, although the production of the confervoid filaments appears to be a normal pro- 
cess, it is still a question open to doubt when only observed in ovaries containing such an 
abundance of ovules as Orchis Morio. T 
The facts I have detailed above are, however, agreeable with what I have observed in 
certain other plants, in some as yet imperfect investigations ; I hope to be able to complete 
them, and to repeat the earlier examinations with especial reference to the doubtful points, 
in the course of the ensuing summer. 
EXPLANATION OF THE PLATE. 
Tax. II. : 
(The Figures are all magnified about 200 times.) 
dieu. Orchis pyramidalis. 
Fig. 1. A young ovule. | 
Fig. 2. The same, somewhat more advanced. The ovule presents a single coat, enclosing the nucleus, 
which consists of a layer of cells (the coat of the nucleus), surrounding a large central cell (the 
embryo-sac). 
Fig. 3. An end view of the summit of the last. 
Orchis Morio. 
Fig. 4. A young, almost erect, ovule with a single coat, from which the nucleus projects. | 
Fig. 5. A more advanced ovule, curving round and exhibiting the nucleus and embryo-sac more 
distinctly. 
| Fig. 6. More advanced stage, ovule almost anatropous; both coats are now distinguishable, the inner 
: projecting out from the outer, and the nucleus beyond the inner. ; 
^ Fig. 7. The inner coat has grown over the nucleus, which still retains its proper cellular coat (7 a). 
 Fig.8. The outer coat has grown up further; the nucleus has lost its coat, and is now a simple sac filled 
with a clear fluid in which float black granules (8 a). | 
covers the inner, which, with the nucleus, is indicated by 
