712 GNETACE^ Ephedra . 



ORD. CXLIII. GIXETACEii^ 



(Blum. Expos. 23). 



Flores unisexuales amentacei monoici vel dioici bracleis vaginae- 

 formibus vel paleis setaceo-laceris fulti. Masc. Involucellura vagin»- 

 forme membranaceum bifidum stamen unicum aut plura in colum- 

 nam connata includens, anlhera 2-4 locularis apice poris deliiscens. 

 Fem. Ovulumsolitarium vel bina involucello duplici vel triplici cincta 

 extimo ore angusto apcrlo inlimo in tubulum exserto. Semen inte- 

 gumento exteriore coriaceo vel carnoso mucamentaceum vel drupa- 

 ceum. Embryo iii axi albuminis carnosi antitropus cotyledonibus 

 binis. — Arbores vel frutices. 



EPHEDRA (L. Gen. il36). 



Flores dioici rarissime monoici amentacei. Masc. Amenta ovala 

 bracteis quadrifariam imbricatis constantia. Flos jn axilla bractefe 

 solitarius slaminibus in unicam columnam coalitis constans, antlierae 

 in columna sessiles vel stipitalfe. Fon. Involucrum vaginis 3-pIuri- 

 bus bifidis vel bilobis decussatim imbricatis ovula 2 rarius unicum 

 fulcrantibus constans. Seminis involucellum exterius apice pertusum 

 interius in tubillum ex ore exterioris exsertum. Pseudonuculte sub- 

 coriaceiv(in nostris) ob vaginas iiivolncri in fructn sjepius succulen- 

 tas bacciformes, — Fruticcs ramulis articulatis apliyllis vel ad ramos 

 aovellos foliis oppositis linearibus obsitis, ad articulationes breviter 

 vaginatis. 



Specierum Orkntalium disposi/io. 



' Pseudonucula involucro demuin succulento drupacea. 

 4- Aphyllai. — involucri vaylnoe glabrte. 

 E. distachya, ^mchi/dada, Nebrodensis, fragilis, campylopoda, podoU/lax- 

 -\ — j- Ad ramos saltem .novellos foliatae. — Involucri vaginae ciliatulce. 

 E. Alte, foliata, polylepis, peduncularis . 



' Involucri fructiferi vaginoe late membranacete non carnosse. 

 E. alata. 



