142 Johnson. — On Arceuthobium Oxycedri. 
‘ I recommend the case to those botanists who may happen 
to have access to a sufficient series of specimens in different 
stages of development.’ 
In 1876 Baillon 1 , admittedly owing to Professor Oliver’s 
description, examined Arceuthobium Oxycedri in many stages 
of its development. At one stage he found a freely projecting 
basally attached cellular papilla in the ovary, which he 
described as an ovide naked and orthotropous and com- 
parable to the nucellus of Polygonum. All the cells of 
this ‘ ovule ’ in its free condition and when pollination has 
taken place are represented as uniform ; it is not until 
later, when the ovule is no longer free but is enclosed in 
well-developed viscid cells [which are not formed in Loran- 
thaceae until after fertilisation], that one embryo-sac, median 
and apical, is said to be formed and fertilisation to occur. 
It will be seen how different this account is from that which I 
have given above. M. Baillon seems to have overlooked the 
embryo-sacs. A comparison of the figures in Plate VI. of 
the Association Fran9aise, 1876, shows that the embryo-sac s 
has the same relation to 0 the young seed in fig. 1 7 that the 
embryo e has to the endosperm (unnamed) in figures 19 and 
20. I believe all three figures represent very similar stages 
in the development of the fruit, and prefer to think the 
lettering s the embryo-sac in fig. 17 a slip of the pen for 
e the embryo, rather than to suppose that the embryo-sacs 
have been overlooked and the embryo mistaken for one of them. 
Some years before, in 1840, Sir W. J. Hooker 2 took Arceu- 
thobium as the type of the Loranthaceae, and for the first time 
figured the male and female flowers of Arceuthobium , making 
use of A. Oxycedri for the purpose. In Tab. XCIX. fig. 8 
of the Flora Borealis Americana an undissected female flower 
is represented. It looks however very much like a young 
fruit, and the likeness is still more apparent in fig. 9, which 
is a longitudinal section of the same. There is no ovarian 
1 Baillon, Fleur femelle de V Arceuthobium Oxycedri , in Assoc Franc. Clerm., 
1876, p. 495, t. 6. 
2 W. J. Hooker, FI. Bor. Amer., 1840, t. 99. 
