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EUPHORBIA—ULMUS. 367 
Euphorbia Lathyris L. Alien. Casually subspontaneous 
on waste ground. Hudswell, Kirklington, Newton-le-Willows, 
Newton-in-Cleveland, etc. 
Euphorbia amygdaloides I. Alien. In the Ainsty in 
a copse between Bilton and Wighill Park; O. A. Moore. Mr. 
F. A. Lees, who has visited the place, thinks there is no doubt 
it was not indigenous. 
Buxus: sempervirens L. Alien. Cultivated in gardens 
up to 350 yards, and occasionally to be met with in a sub- 
Spontaneous state. 
Mercurialis perennis L. British type. Native. Area 
general. Range 0-500. Common in shaded places, ascending 
to Cronkley Scars and the Main Limestone cliffs of Harlen 
Fell. 
Urtica urens L. British type. Native. Area general. 
Range 0-350. Frequent by roadsides and in waste ground 
throughout the lower zone, ascending in Swaledale to Keld. 
Urtica dioica L. British type. Native. Area general. 
Range o-800. Ev erywhere common in waste ground, ascending 
to the Main Limestone of Widdale Fell and Mickle Fell. 
Parietaria diffusa Koch. British type. Native. Area 
S780" 433 7) Range 0-250. Frequent upon old walls, 
ascending in Wensleydale to Bolton Scars. I have seen the 
species within our limits once only upon a natural cliff, a lime- 
stone scar in Billybank wood, near Richmond. 
Humulus Lupulus L. English type. Denizen. Area 
general. Range 0-200. Frequent in hedgerows in the low 
country, but I have not seen it except in the vicinity of houses, 
and never in the aboriginal woods. The heat of the inciines 
of the low country is usually not intense enough to properly 
ripen its seeds. 
Ulmus montana Smith. British type. Native. Area 
general. Range o-450. Common in hedgerows and woods, 
ascending in Teesdale to Holwick Scars, in Swaledale to the 
July 1892, 
