Order 129.— CYCADACE^E. 



Order CXXIX. CYCADACE^E. Cycades. 



665 



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



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



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



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



Oetie.'-n 7. specie's 4G, chiefly tropical. The Cycades form tho connecting link betweea tho 

 Exogens and tho 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 arc all clustered at the summit of the 

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



a Mne'of st^i'n^J S T buja occidentals, with strobiles. 2. A magnified brnnchlet with 



^nverl^nnif^° Wer f S ^ a A /«pe»«7 ^alo with the two winged seeds. 4. A vertical 

 6 One Tr thf™. f 1 ° f t] }° ? eeds ' showin S ^e embryo, &c. 5. ThS immature, erect ovules. 

 I %™u . witwh- k 9e " lar ^ showing the micropylo at top. 7. Branch of Abios Americana. 

 IfhTv«.fPii ,- 9t 8c " le With immatn ™ ovules. 10. Scale with ripe seeds. 11. A pair 



ovule, tnrnLri^ re * l "<*\ , If. Anther of Pinus sylvefltris. 13. Scale of the cone, with the 

 SSLyViSSoySi Stauiinate scale of Cupressus, with pollen. 15. Fertile scale, with 



