142 THE BOOK OF EVERGREENS. 



Three kinds are not sufficiently known, either to estab- 

 lish their claims as distinct species, or to determine of 

 which they are synonyms. 



Our attention will next be directed to the older species 

 of Mexican Pines, as well as to those of the Eastern Con- 

 tinent that we suppose to be too tender for cultivation in 

 the open air with us. 



Belonging to the Since section, are the following, viz. : 



43. P. Merkusii, Vriese. Is a very tender species 

 from the mountains of Sumatra, Cochin-China, Borneo, 

 etc., where it grows about 100 feet high. 



44. P. Persica ? Strangways. Is from the south of 

 Persia, where it forms a large tree with rather short, slen- 

 der branches, and numerous, stiff, deep green leaves. 



Gordon mentions a doubtful species from Palestine and 

 Arabia, called by Sieber P. Arabica, and which is prob- 

 ably nothing more than jP. JETalepensis. 



In the Ternaice section we have 



45. P. Canaricnsis, Smith. Is from the Canary 

 Islands, growing 60 or 70 feet high, at an elevation of 

 from 4,000 to 6,000 feet, and forming large forests. This 

 pine makes a beautiful object when grown in pots and 

 sunk in the ground. 



46. P. Cdlllis, Engelmann. Syn. P. cembroides, 

 Gordon. Must not be confounded with the P. cembroides 

 of Zuccarini, which latter plant is the true P. Llaveana 

 of Schiede, according to Gordon's classification. 



Prof. Torrey says of this pine, in Pac. R. R. Report : 

 " Rocky places on the Llano Estacado ; also near Hurrah 

 Creek, New Mexico, Sept. 20 ; with ripe seeds. Near 

 Bill Williams' Mountain, Jan. 5. A tree 40 to 50 feet 

 high, called Pinon by the Mexicans, and Nut-Pine by 

 American travellers. It is found from 150 miles east of 



