BRITISH OAKS 35 
Q. rosacea Bechst. in Sylvan. 67 (1813). 
Q. hybrida Bechst. in Sylvan. 63 (1816), non B 
Q. intermedia Boenn. in Reichenb. Fl. Germ. Te, 177 (1830). 
(). brevipes Heuff. in Wachtel Zeitschr. i. 99 (1850). 
Q. pedunculata var. pseudo-sessilis Schur. in Oesterr. Bot. 
Q. pseudo-sessilis Schur. Enum. Pl. Transilv. 608 (1866). 
. hungarica Kit. in Linnea, xxxii. 353 (1863), non Hubeny. 
. Csatot Borb. in Mag. Nov. Lap. x. 133 (1886). 
Q. ertoneura Borb. in eee Bot. Monatschr. v. 164 (1887). 
Q. nea Borb. 
ocke (1881) gives a an » additional nena Ss ambigua Kit. ; but 
Giirke refers this to Y. Robur x lanugino 
The hybrid is easily distinguished as the presence of both 
multiple hairs (Plate 502) and reflexed auricles ie 502) on the 
under pes of the leaf. Both the petioles and the peduncles are 
long. Some of the larger veins run to the bases of the sinuses, but 
the natal appearance of the lobing and venation is that of Q. ses- 
siliflora. As stated by Focke (1881), its pollen is normal and its 
seeds fertile. Ripe seeds from hybrid trees germinate freely and 
—-. and _ ae oe applies to Quereus hybrids in general. Suffi- 
QO¢ 
ve to 
the "ste —— that its comagivas fig segregate indopes- 
the Hybrid Oak is not only self-fertile and capable of successful 
cross-pollination by other hybrids like itself, but also of being 
fertilized by the pollen of either parent. Thus arise forms 
which, wine to the independent segregation of the diagnostic 
cha sarees the parents, are difficult and perhaps impossible 
to determi 
The distribution of this tree is in accord with its presumed 
hybrid origin. From Europe, it is only recorded from countries in 
which both Q. Robur and Q. sessiliflora are known to occur: in 
- Britain it has only been observed in those localities iam both 
occur in close Sen Si It has been found in every such 
c 
has failed to reveal it. It is interesting to add that it was the 
be discovery of the Hybrid Oak in a wood in the west of Cambridge- 
ao ering accounts of recent work on plant-breeding, from from the point of 
here indiaied, will be found, in Dunnett's Mendsiom, an in Lock’s 
Verlation: —— and Evolution or be — 
so 
