x 50. 
LINN. Soc. JouRN., BOT. VoL. XXXV. PL.' 24. 
Fic. 4—Pinus monophylia 
MASTERS. 
mithii 
Fig. 5.—Pinus Donnell-S: 
Fie. 6,—Pinus ‘filifolia. 
SECTIONS OF LEAVES OF PINUS. 
