ORDER 129. CYCADACEJE. 

 ORDER CXXIX. CYCADACEvE. CYCADES. 



665 



Trees of low stature, simple trunks with the internodes undeveloped and the sur- 

 face scarred with the fallen leaves which were pinnate, parallel-veined, circinato. 

 Flowers dioecious, in cones, $ anther covering the under surface of the connective. 

 Scales peltate, scale-like or leaf-like, bearing naked ovules dorsal or marginal. 



Genera 7, specie* 46, chiefly tropical. The Cycades form the connecting link between tho 

 Kxogens and the Cryptogawia. 



CY V CAS revoluta, a palm-like plant, representing this order endures 

 the winters of the far South, and is frequent in the greenhouses of the 

 North. Its long, pinnate leaves arc all clustered at the summit of the 

 short, abrupt trunk which is tesselated all over with leaf-scars. 



FIG. 0931. Branch of Thnja occidental!*, with strobiles. 2. A magnified branchlet with 

 a/.meof staminatellowers. 3. A carpellary scale with the two winged seeds. 4. A vertical 

 tran verse si-ction oi one of tho seeds, showing the embryo, &c. 5. The immature, erect ovules. 

 8 \" C \ -il ?h h S e ?' ar r'l' Sl " nvi "" thc '"teropylo at top. 7. Branch of Abies American,,. 

 8 Scale, w.th the bract. 9. Scale with immature ovules. 10. Scale will, ripe seeds. 11. A pair 

 of eavoa of Pinna resinosa, 12. Anther of Pinus sylvestris. 13. Scale of tho cone, with tho 

 <n u!fs turnod <lownward. 14 Stauiinato scale of Cupressus, with pollen. 15. Fertile scale, with 



