34 THE JOURNAL OF BOTANY 
Holeus mollis, Carex pilulifera, and Rumex Acetosella. Simi- 
n 
other woods dominated by this species of Oak are dry enough to 
allow of extensive sheets of Pteris, peer vulgaris, Atra flexuosa, 
and Shane saxatile. 
The unds on which Q. Robur oe = sess paige are 
fcoardae a epee: Spadios may be summarized here. In its 
refiexed leaf-auricles obur possesses a pom ive character 
which is almost unique in the genus. In its absence of multiple 
hairs Q. Robur is also exceptional, as such hairs are present in 
the great majority of Oaks. These and other characters are con- 
stant, and come true from seed. Lastly, the habitats of Q. Robur 
nd of Q. sesstliflora are very different, and in many districts 
mutually ralaatra. It therefore seems unreasonable to unite the 
two plants under one specific name. 
ITT. QuERcus et X SESSILIFLORA (see Plate 502). 
Whilst several of the earlier writers on British Oaks had not 
wild state in England”; an r. Druce, as already stated, puts 
the hybrid in his vaca Neither Mr. Henry nor Mr. Druce, ag 
ever, gives a definite record, and thus the ait record seems to be 
that in The Maiwrahet len March, 1909 (p. 113). The hybrid ‘Oak 
has recently been observed in the ralowin Watsonian vice- 
M. 
: Cornw 
Rankin !), Hast Kent, West Kent, East pore Cambridge, Bed- 
ford, Hereford (A. G. T.!), Worcester (A. G. T.!), eae oeuth 
Lancaster, West Lancaster, North-east Yorkshire nS th !), 
South-west Yorkshire, Mid-west one hire (W. M oe 1), ; and 
Westmoreland. erbarium specimens indicate its occurrence 
dictelots, wherever, ra ace a oO. Robur region adjoins a Q. sessili- 
flora region, and wherever both species grow in Piss r semi- 
natural occasionally happens on deep, d 
In the Planta Europee of Richter & Giirke (i. 58, 1397) t the 
hybrid is recorded from France, Germany, is Austria, Hun- 
gary, Transylvania, Croatia, Slavonia, Pg Russ 
It seems probable that the described hairy raves re closely 
allied species of Q. Robwr may prove to be hybrids . Robur 
with allied hairy species, such as Q. sessiliflora and Q. . ha ea 
The plant is named Q. intermedia Boenn. non D. Don by Mr 
Henry and Mr. Druce: the hybrid certainly arene to Boen- 
given by Giirke (/.c.) as follows, d 
be 
ninghausen’s plant; but this name, Reyne: n the synonymy 
it 
