— 2^ — 



F. A. G. Miquel, Monographia Cyoadearam, 18^2. Genei^i 

 et spec. Cycadear. vivenlium — et iiber den Bau eines er- 

 wachsenen Stammes v. Cycas circinalis in Linnsea, 1845-4. 

 Observaliones de ovulo et embryonibus Cycadear. , 1845i 



C. A. Meyer, Versuch einer Monographie d. Gatt. 

 Ephedra, 1846. 



Ad. Brongniart, Prodrome d^une histoire de vegetaux 

 fossiles, 1828. — Observations sur la structure iiiter. du Si- 

 gillaria elegans etc 1839 — ahique Paleontologi. 



Ordo I. Pinopahnae. 

 Slrobilanthae palmiformes, amylace^e et gummiferae. 



F A M. 54. Z A ai I A C E iE S. CYCADEiE. 



Tropicse -< , caudice arborescente \. contracto-bulbiformi, 

 acrobryo et peripherice continuo incrassando, rhizomate al- 

 bicante vix ramoso, rhizoniis passim tuberosis. Fascicuh hgnei 

 e tubuhs prosenchymaticis, porosis v. poroso-reticulatis (vasa) 



constantes , radiis medullaribus h crassis disjuncti v. in 



cyhndrum simphcem v. polystromaticum conferti; medulla 

 amylacea ampla, raro fibrifera; cortex crassus parenchymati- 

 cus (medullae subsimilis et gummifer) funicuhs ligneis , a 

 foliis descendentibus varie pertextus el strato interno distincto 

 (libro?) auctus ; periderma e bassibus foliorum et perularum. 

 Folia (frondes) coronantia, perulata, annua v. biennia, pinna- 

 tisecta, rachi et segmentis novellis pa^sim tomentosis et circi- 

 natis V. imbricalis. Flores dioeci, nudi, terminales; Stamina 

 maxima , monadelpha , novella conferruminata in strobilum, 

 lente increscentem, tandem dehiscentem, quibusdam bipeda- 

 lem; anlherae grossse, connexivo squamiformi v. peltato, subtus 

 loculis numerosissimis, seggregatis v. per paria, tria aut 4 aggre- 

 gatis, bifidis et passim in areas binas coUectis, onusto ; pol- 

 linia ellipsoidea, fasciata , hyaUna. Ovaria phylloidea ( car- 



