THE PINES OF MEXICO- 1 3 



7. PINUS LEIOPHYLLA SCHL. & CHAM. 



Pinus leiophylla Schlechtendal & Chamisso, Linnaea, vi, 354 (1831); xii, 490 (1838). 

 Lambert, Gen. Pin. ed. 3, i, 38, t. 21 (1832); ed. 1, iii, text & pi. Forbes, Pinet. Woburn. 

 74, t. 28 (1839). Antoine, Die Conif. 39, t. 18, f. 2 (1840). Loudon, Encycl. Trees & 

 Shrubs, ion, fig. 1893 (1842). Endlicher, Syn. Conif. 155(1847). Parlatore, DC. Prodr. 

 xvi, pt. 2, 401 (1868). Hemsley, Bot. Biol. Cent. Am. iii, 187 (1883). Shaw, Card. 

 Chron., ser. 3, xxxvi, 175, fig. 69 (1904). 



Leaves with deciduous sheaths, in fascicles of 5 or of 3 and 4, from 10-14 cm - ' on g; resin ducts 

 medial, occasionally internal, the two fibro-vascular bundles distinct, contiguous or merged in 

 one. Conelets subterminal, on long peduncles, single or in clusters of 2-7, subglobose, 

 their scales armed with a conspicuous, sometimes stout and persistent prickle, conelets of the 

 second year somewhat larger. Cones maturing the third year, not exceeding 7 cm. in length, 

 ovate or ovate-conical, subsymmetrical, more or less reflexed, persistent for many years, often 

 serotinous, their apophyses thin or somewhat tumid, of a dull yellowish or dark brown color, 

 the umbo central showing clearly the limits of the growth of the first two years. Branchlets 

 more or less pruinose, the decurrent bases of the bracts deciduous at the end of the first sea- 

 son ; the bark at first thin, separating in deciduous scales, red, becoming very coarse and 

 rough at an early age. 



A tree of varying size with short gray-green foliage, persistent, often very abundant 

 cones, growing at subtropical and warm temperate altitudes in eastern, western and southern 

 Mexico. It has not been found south of the State of Oaxaca nor on the north eastern Sierras. 



Nelson, 986 (398559) La Parada, Oaxaca; 1487 (398562) Oaxaca Valley, Oaxaca; 6558 (398628) Mt. Patam- 

 ban, Michoacan. Nelson & Goldman (396794-5) Volcan Iztacihuatl. Goldman 5 (303991) Valparaiso, Zaca- 

 tecas. Rose, 2990 (301945) West of Bolanos, Jalisco; 3027 (301984) Bolanos to Guadalajara, Jalisco. Rose <5r* 

 Hough, 4294 (346239) Las Vigas, Vera Cruz. Rose 6" Hay, 5536 (395298) Ajusco, Mexico; 5968 (395759) 

 Contadero, Tlaxcala; 6234 (396143) Volcan Popocatepetl. Rose & Painter, 7153 (450779, 451636) Eslava ; 

 Mexico. Rose, Painter 6r> Rose, 8482 (451974) Encarnacion, Mexico. Pringle, 6180, Sierra Ajusco, Mexico; ' 

 8182, Las Vigas, Vera Cruz. Shaw, Cuernavaca, Morelos ; Ferraria de Tula, Jalisco ; Nanacamilpa Tlaxcala; 

 Contreras, Eslava and Ajusco, Mexico. 



Pinus leiophylla is abundant in the Federal District and grows quite near the City of Mexico, although its 

 triennial fructification appears to have' escaped the notice of the earlier collectors. The species is very prolific, 

 and branches bearing cones in all stages of their growth are common. 



