172 
THE PRINCIPLES OP BOTANY. 
The second list is by Dr. Bull, and refer principally to Here¬ 
fordshire localities. It is a fuller list than the first, but fails for 
the most part in any mention of localities. 
List op Trees on which the Mistletoe grows, mostly 
prom Worcestershire, by Edwin Lees, Esq., E.L.S., 
E.G.S., &c. 
On the Apple. —“ Extremely abundant; and why it is so, I 
think, arises from the disposition in that tree to form knots, a 
disease produced from an excess of sap, or an inertness in it which 
the mistletoe offers a relief to, somewhat analogous to cupping— 
the redundant juices being carried off as nutriment to the parasite.” 
Crab.— “ Common.” (E. L.) 
Pear. —“Rare.” (E. L.) 
Black Italian Poplar. —“Very freely.” (E. L.) 
Other Poplars. — “ Very rarely.” (E. L.) 
Lime. —“ Rather common, and often plentiful, infesting the 
trees to the summit.” (E. L.) It attaches itself to some of the 
finest trees in several countries. 
Hawthorn. —“Frequent and in extending lines” (E.L.). We 
have but seldom met with it. 
Maple. —“Not unfrequent” (E. L.). We have seen this 
once or twice in Gloucestershire. 
Sycamore. —“At Lansdown, Cheltenham, pointed out to me 
by my friend, Professor Buckman” (E. L.). 
It is now some twenty-five years since we took our friend to 
see two trees of sycamore growing together opposite Lansdown 
Crescent, in both of which were bunches of mistletoe, and these 
are the only instances we have met with. The trees are fine old 
specimens. 
Mountain Ash. —“Very uncommon in the vicinity of Led¬ 
bury and about the Malvern Hills” (E. L.). 
White Beam (Pyrus aria). —“Unfrequent, but on the rocks 
near the western portal of Chepstow Castle is a fine tree, with 
much mistletoe upon it” (E. L.). Though this is a common 
tree in Gloucestershire, we have never seen any mistletoe upon 
it. This may be from the fact that it mostly grows on the Oolites 
to which apple orchards scarcely extend. 
Hazel. —“Of very rare occurrence, and esteemed by the 
Druids next to that on the oak” (E. L.). 
Elm. —“In one locality, near Bushley Park Farm, in the 
vicinity of Tewkesbury.” 
Robinia Pseud-Acacia. —“Local, though in shrubberies in 
* We have put Mr. Lees’ initials when quoting his remarks. Other 
remarks relate chiefly to Gloucestershire. 
