ENUMERATliD IN THE PINETUM. XVll 



Gen. CuAMJicyrAuis, Spach. Leaves, scale-formed, in opposite 

 pairs, four-rowed, with a gland or sunken groove 

 on the back, glaucous and persistent. 



Flowers, male and female on the same plant, but 

 separate. 



Cones, globular or oblong, small and wood)', with 

 mostly seven scales, in opposite alternate pairs. 



Seeds, convex, hard-shelled, and in twos at the 

 base of the scales, in sunken grooves, and either 

 wingless or very slightly furnished with rudimentary 

 ones. 

 Gen. Glyptos'Trobvs, Endlicher. Leaves, scattered, spreading, 

 variously shaped, and trigonal or subulate. 



Flowers, male and female on the same plant, but 

 separate. 



Cones, egg-shaped or oblong, and composed of 

 several unequal-sized scales, all rising from the 

 base, and of a leathery texture. 



Seeds, in twos, and winged. 

 Gen. T.vxoDiUM, Richard. Leaves, linear, two-rowed, and de- 

 ciduous. 



Flowers, male and female on the same plant, but 

 separate. 



Cones, globular, woody, and with the scales 

 shield-shaped. 



Seeds, irregularly shaped, wingless, woody, and 

 in twos. 

 Gen. Callitkis, Ventenut. Leaves, very small, scale-formed, 

 in alternate opposite pairs, close at the base of the 

 joints, and with a gland on the back. 



Flowers, male and female on the same plant, but 

 separate. 



Cones, globular, or somewhat four-sided, and 

 composed of four valved woody scales, truncated 

 at the top, and with the alternate pair smallest. 



Seeds, one or two at the base of each scale, 

 slightly compressed, or three-edged, and winged 

 on each side. 



