Ordbb 129.— CTOADAOE^. 



66S 



OedbrCXXIX. CYCADACE^ Cyoades. 



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



Eioe scarred with the fallen leaves which were pinnate, parallel-veined, circinate. 



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



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



Oenera 7, tpeeies 46, chiefly/tropical. The Cyoades form the connecting link between the 

 Rxogens and tlie Cryptogamia. 



CY^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 are all clustered at the summit of the 

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



FIG. MS. — 1. Branch of Thnja occidentalia, with strobiles. 2. A magnified branchlet with 

 a »ono of Btaminato flowers. 8. A carpcllary scale with the two winged seeds. 4. A vortical 

 tranverso section of one of tho seeds, showing the embryo, &c. .'!. The immature, erect OTnlcs. 

 «. One of the orules enlarged, showing the micropylo at top. 7. Branch of Abies Americana. 

 8. Scale, with tho bract 9. Scale with immature ovules. 10. Scale with ripe seeds. 11. A pair 

 of leaves of Pinna reslnosa. 12. Anther of Pinus sylvcstrls. 18. Scale of tho cone, with the 

 ovules turned downward. 14. Stamlnate scale of Cupressus, with nollea 16. FortUo scale, with 

 many ere«t oyoie& 



