166 CUPULIFERA. 
A very variable species, common in the mountains from North Mexico to Peru and 
Bolivia. In Kew herbarium there are numerous specimens from Mexico and Central 
America that are not referred to any particular variety. 
2. Alnus jorullensis, H. B. K. Nov. Gen. et Sp. ii. p. 20. 
«. typica, Regel in DC. Prodr. xvi. 2, p. 184, 
Sour Mexico, Volcan de Jorullo at about 3700 feet (Humboldt & Bonpland), peak 
of Orizaba at 8000 to 10,000 feet (Liebmann ; Schiede). 
B. castanezefolia, Regel in DC. Prodr. xvi. 2, p. 184; Mirbel in Mém. Mus. 
d’Hist. Nat. Par. xiv. p. 463, t. 21 (species). 
Soutu Mexico, Orizaba (Bilimek, 404).—Prrv. Hb. Kew. 
Tribe Il. CORYLEA. 
Corylee, Benth. et Hook. Gen. Plant. iii. p. 403. 
Four genera and about twenty species in temperate regions all round the northern 
hemisphere. | 
2. OSTRYA. 
Ostrya, Scop. Fl. Carn. p. 414; Benth. et Hook. Gen. Plant. i. p. 406. 
Two species, the second inhabiting the south of Europe and Western Asia. 
1. Ostrya virginica, Willd. Sp. Pl. iv. p. 469; DC. Prodr. xvi. 2, p. 126. 
Carpinus ostrya, Linn. Sp. Pl. p.1417 (quoad syn. Amer.) ; Michx. Hist. Arbr. For. de Amér. 
Sept. ii. p. 54, non ic. 
Ostrya vulgaris, Wats. Dendr. t. 143. 
New Brunswick and Lake Winipee southward to FLorma.—Mexico, Jalapa (Linden, 
26), Orizaba (Bottert, 284, am) GuatEMALA, Volcan de Fuego at 6400 feet (Salvin). 
Hb. Kew. 
Tribe III. QUERCINEA. 
Quercinee, Benth. et Hook. Gen. Plant. ii. p. 403. . 
Four genera and about 340 species, covering the whole area of the Order, except the 
colder northern regions where Birches and Alders are found. 
3. QUERCUS. 
Quercus, Linn. Gen. Plant. n. 1070; Benth. et Hook. Gen. Plant. in. p. 407. 
About 300 species, widely dispersed in temperate regions of the northern hemisphere, 
and extending southward in the mountains of Tropical America as far as Colombia, and 
