180 SALICINEA. 
4. Salix hartwegi, Benth. Pl. Hartw. p. 52. 
Sour Mrxico, Anganguio (Hartweg, 390), Real del Monte and Moran at 7500 to 
8500 feet (Galeotti, 73). Hb. Kew. 
Andersson (in DC. Prodr. xvi. 2, p. 236) doubtingly reduces this to S. humilis, 
Marsh., a species having a wide range in North America. 
5. Salix latifolia, Mart. et Gal. in Bull. Acad. Brux. x. (reprint, p. 4). 
Soura Mexico, peak of Orizaba at 12,000 feet ( Galeotti, 70). 
Apparently not taken up by Andersson in De Candolle’s ‘ Prodromus.’ 
6. Salix nigra, Marsh. Arbust. Amer. p. 293. 
3%. wrightii, Anders. Monogr. Sal. p. 22, et in DC. Prodr. xvi. 2, p. 201, et in 
Ofvers. Vet. Akad. Forh. 1858, p. 115 (species). 
‘Norra Mexico, near Lake Santa Maria, Chihuahua (Wright, 1877) ; Sours Mexico, 
Sierra San Pedro Nolasco (Jurgensen, 307). Hb. Kew. 
This species, of which Andersson distinguishes four varieties, ranges from CanaDa to 
Fioripa and TExas. 
7. Salix paradoxa, H. B. K. Nov. Gen. et Sp. ii. p. 25. 
Soury Mexico, near Moran, at about 8000 feet (Humboldt & Bonpland), Gasimalpa 
(Schaffner)? 
8. Salix stipulacea, Mart. et Gal. in Bull. Acad. Brux. x. (reprint, p. 3). 
Sourn Mexico, banks of the Rio Grande de Mextitlan, near the district of Real del 
Monte, at 4500 feet (Galeotti, 75). 
See remarks under S. cana. | 
9. Salix taxifolia, H.B.K. Nov. Gen. et Sp. ii. p. 22; DC. Prodr. xvi. 2, p. 219. 
Salix microphylla, Cham. et Schl. in Linnza, vi. p. 354; Hook. et Arn. Bot. Beech. Voy. p. 310, t. 70. 
Texas; New Mexico; Catirornta?—NortaH Mexico, Chihuahua (Potts); Souri 
Mexico, Cordillera of Vera Cruz at 2000 to 4000 feet (Galeotti, 68), region of Orizaba 
(Miller, 917; Bilimek, 402), Zacatecas (Coulter, 1410), along the torrents of San 
Cornelio (Hartweg, 391), sandbanks of the Tecoluta near San Pablo (Schiede & Deppe) ; 
GUATEMALA, on the river Pinula, on the road from Guatemala to Amatitlan (Skinner). 
Hb. Kew. 
2. POPULUS. 
Populus, Linn. Gen. Plant. n. 1123; Benth. et Hook. Gen. Plant. iii. p. 412. 
About twenty species, inhabiting Europe, Asia, and North America. 
1. Populus balsamifera, Linn. Sp. Pl. p. 1464; DC. Prodr. xvi. 2, p. 329 
(varietates); Nouv. Duham. ii. t. 50. 
CaNADA southward.—NortH Mexico, on the Mimbres, within the old boundary 
(Bigelow). Also in Centran Asia. Hb. Kew. 
