— 8i| — 



JFlforc^ dioeci <;, amenlacei, acrocladi, unibracteati: cf urceolus 

 (torus) stamina 2 v. plura, antheris normal. basifixis, gerens^ 

 § torus et ovarium bivalve, uniloculare, ovulis co anatropis, 

 e placentis brevib. medivalvibus adscendentilDus , slylis 2, 

 2-3-lobis. Capsula unilocul. , bivalvis., polysperma; semina 

 minuta , erecta, pilis longissimis invohicrata (arillus?), em- 

 bryone amygdalino, exalbuminoso: — Salijr^ Populus. 



F A M. 106. B E T U L A C E iE. 



Arbores frutic. foliis alternis, simpl., serrat. v. sublobatis, 

 costatis, novell. stipulalis. Amenla monoeca, termin. v. lateralia, 

 bracteis 2-3-floris: cf bractea, bracteolae et sepala 1-4, an- 

 theris oppositis , brachynemis, basifixis, unilocularib. longi- 

 trorsum dehisc, v. 2-Iocular. perischizis; § bracteae 2-3-flor3e 

 et sepala O v. 4, demum basi ovarii adcreta, ovarium bilo- 

 cul. 2-sligmeum, ovulis solitariis, demum anatropis, septo 

 appensis. Strobilus bracteatus , nuculas monospermas v. ca- 

 ryopsides apteras V. alalas fovcns; semen inversum exalbumino- 

 sum, cotyledones planiusculse, radic. supera : — Betulaj Alnus. 



Ordo IV. Corylastra. 



Arbores frutic. fol. simpl. v. pinnatis, passim stipulalis; 

 flor. diclini , amentac. saepe perigoniati; ovaria perigonio 

 minuto inn.ita, '1-3-locul., solitar. v. conferta, ovulis solitar. 

 V. gemin. anatrop. v. atropis. Nuces saepius involucratse; 

 sem. exalbuminos;i. 



F A « . 1 07. C O IJ Y L A C E JE ( C u p U l i f k r A k). 



Arbores v. frutices, foliis alternis, costatis , integris, den- 

 tatis, pinn:>tifidis, piimatis? stipulatis. ¥lor. diclini: (J ameu- 

 tacei, bracleis variis v. et perigonio 1-4-6-mero (raro duplici), 

 4-oo-andro praediti, antheris 1-2-IocuIar., longitrorsum de- 

 hiscentibus; § solitarii, fasciculali v. spicati, singuli v. plures, 

 involucro toliaceo, squamoso v. setoso iuclusi, perigonii ad- 

 nati limbo minuto , ovario 2-3-IocuIari, schizo- v. synstylo, 



