J' ersuch einer Monographie der Gattung Ephedra. . 63 



distinctus, genera duo, liabitii valde dissimilia, alterum tropicum, alterum 

 extratropicum, amplectens. 



GiN'ETüM Linn. 

 Linn. Moni. p. I25j Blume l. c. p. 102; Endlicher l. c. p. 263; Meis- 

 ner i. c. p. 352 etCommmi. l. c. p. 2G3; Brongniart in Duperrey Vor. 

 aulour du monde Fol. II p. 5 etc. tab. I. Spach l. c. p. 283. 

 Amenta monoica aut dioica, cylindracea, articulata, intcrrupte verticiU 

 lata: vcrticillis singulis involucro abbreviato cupuliformi fultis. Flores paleis 

 setaceo-dilaccratls (pilis fasciculatis articulatis submoniliformibus, Brong.) 

 immersi, masculi et foeminel in eodem amenti verticillo, yel in diversis 

 verticillis, vel etiam in distinctis amentis (an in diversis arboribus?). Mas. 

 Vaginula bifida, stamen solitariuin fovens. Anthera bilocularis: loeulis con- 

 tiguis vel in filamenti cruribus sejunctis, apice rimula dehiscentibus. Foe- 

 mina. Involucrum: vagina solitaria, ventricoso-tubulosa, apice poro pertusa, 

 uniflora, in fructu suecuienta. Involucellum ventrieoso-tubulosum , apice 

 poro pertusum, semen nudum indudens. Gotyledones in corpus solidum, 

 apice bidentatum connatae. 



Arbores erectae vel frutices sarmentosi, in Asia tropica et in Guiana 

 Americae provenientes , ramis geniculato-nodosis, foliis oppositis ovatis, 

 amentis axillaribus et terminalibus elongatis pedunculatis. 



EPHEDRA Tournef. 



Tournef. CoroUar. Instil. rei herb. p. 53 tab. klT. Linn. gen plant. 



ed. I p. 312; kndlicher l. c. p. 263; Meisner l. c. p. 352 et Comment. 



l. c; Richard Comment. hotan. de Conifer. et Cycad. p. 135, tab. i 



et 29, Spach Ilist. nal. des Feget. T. XI p. 287. 



Amenta mascula et foeminca subglobosa in diversis plantis, rarius in 



eadem stirpe. Mascula e vaginis bitidis decussatim superpositis coniposita. 



riorcs solitarii, in vaginarum asillis oppositi: vaginula bifida, e fundo co- 



