+ THE JOURNAL OF BOTANY 
marca ae ~~ es Ke ¢. tk pi are typically long, it is 
by o find e petioles are short ; 
ang near Wateeen: in the District, wii woods are com- 
posed of this form. In this case, also, the question of hybridism 
: rac 
and shallowe uses, in those and the leaf 
of the former species is also typically flatter and broader above 
the middle ginners, at least, oy characters are of an 
elusive nature. The leaves are sometimes cuneate at the base, 
and at other times broad at the base ; eng in the latter form there 
is frequently a curl at the base, which i iy a to be mistaken for 
the completely reflexed auricle of Q. #. 
Typical acorns (figure 1, b) of Q. St are oblong-ovate ; 
but c§ interesting form or variety with cuneate acorns (figure 1, 
e and f), frequently with a constriction near the tip (figure 1, e), 
ommon. A much rarer but more striking variety possesses 
subapherioal acorns (figure 1, g an 
t is not unlikely that several varieties of Q. sesstliflora occur 
having hereditary characters Elw es and Henry (1907) mention 
fifteen arboricultural “ variatas ’ of Q. se cry whilst Lasch 
(1857) has described numerous varieties and subvarieties, a large 
one. 
Q. sessiliflora occurs throughout Europe in hilly and moun- 
tainous  Aeeiob in Asia Minor, and in Persia. On the meta- 
with peduncled fruits is found. In Great oer Q. sessiliflora is 
the commoner species on the shallow soils of the non-calcareous 
hills of the north and west, where it frequently ners to the total 
exclusion of Q. Robur. On the rocks of the Millstone Grit and 
oal-measure series of the Pennines, for example, .. for a 
is the dominant tree in the woods below 1000 ft. (302 m.). 
— other hand, Q. Robur is, on the same rocks, often west sei 
to situations where it has sang a been planted, such 
‘a hedgerows, park-lands, plantations, and those portions of the 
woods which contain planted trees. - eg south and east of 
England, Q. sessiliflora, as an indigeno species, occurs on dry 
dy and g 
m.). 
Tt is Soi that the hairs of the leaves of Q. sessiliflora are 
of service in checking excessive transpiration, and may perhaps 
be related to the fact that the species frequently inhabits more 
exposed places |= its ally, Q.Robur. The absence of hairs from 
_— seedlings of Q. sessiliflora is perhaps not to be wondered 
at, as the carpet of a wood where the seedlings — germinate 
occurs, 
