1818.] Mr.] a the Geography of Plants. 335 



to this mode of arrangement. Under this impression L transmit 

 to you some remarks, assigning to several species, indigenous to 

 the parallel included between 54° 30' and 50° 30' north latitude, 

 their respective situations as to soil and elevation above the 

 level of the sea. These notes, which must be considered 

 merely as a fragment, I hope will prove interesting to a few of your 

 readers at least, either in an agricultural or philosophical point 

 of view ; and, ultimately, may be useful to some writer who shall 

 dedicate his time and abilities in thoroughly developing this 

 branch of English botany. 



England in the parallel 55° N. is 70 miles broad. The most 

 elevated mountains here, are Helvellin and Skiddaw, among 

 the greywacke and porphyritic hills of Cumberland ; to these 

 jsucceed Cross Fell, in the encrinal limestone range ; next, the 

 syenitic hills of Cheviot and Hedgehope, in the north of North- 

 umberland ; then Pontop, in the Newcastle coal field ; and 

 Brandon Mount and Warder's Law, in the magnesian limestone 

 near the east coast.* That part of the district bounded on the 

 north side by the Tweed, and on the south by the Tees, by 

 Cross Fell on the west, and by the ocean on the east, possesses 

 a flora of 1,000 phsenogamous and 1,130 cryptogamic plants; 

 and about 40 additional species have been 'detected in Cumber- 

 land, unknown to Northumberland and Durham. 



plants are comprised, 



15 Of the class Monadelphia. 

 44 Of the class and order 



Diadelphia Decandria. 

 33 Of the class and order 



.Didynamia Gymnospermia. 

 22 Of the order Angiospermia. 

 19 Of the class and order Te- 



tradynamia Siliculosa. 

 26 Of the order Siliquosa. 

 rich are included in the above 



Among the Phaenogamous 



27 



20 



11 



145 



species of Trees. 



Willows. 



Roses, f 



Grasses and Carices. 

 14 Liliaceous plants. 

 11 Rough-leaved plants. 

 42 Umbelliferous plants. 

 20 Orchideae. 

 81 Syngenesious plants. 

 And 221 Annuals, many 

 number. 



of w 



The Cryptogamic plants consist of 



Lichens. 

 Fungi. 



37 Filices. 300 



258 Mosses and Jungermanniae. 368 

 164 Fuci and Confer vae. 



To descend from general to particular observations, I shall 

 notice 



Feet. 



• Helvellin 3,055 



Skirldaw 3,022 



Crow Fell 2,901 



Cheviot 2,C:)S 



Feet. 



Hedgehope 2,347 



Poniop Pike 1,018 



Brandon Mount 875 



Warder'!, Law 632 



t Humboldt did not find an indigenous Rose in South America, and only one 

 speciei in Mexico. 



