84 BOTANICAL GAZETTE [AUGUST 
30 cm. above the surface of the rock upon which the plant was 
growing. The foliage display practically always consists of two 
successive crowns, the leaves of the lower standing transversely or 
beginning to droop, while those of the latest crown are more erect, 
but the two nevertheless presenting the appearance of a single 
Fics. 1, 2.—Dioon spinulosum: fig. 1, upper part of a trunk 6 meters in height; 
the latest crown is tied with the string, the next crown below has been cut aw ay with 
a machete, and the leaves of the 6 crowns below this have fallen off naturally; X¢; 
fig. 2, lower part of same trunk, showing scars of 21 crowns; X}. 
