92 EUCALYPTS CULTIVATED IN THE UNITED STATES. 



in verifying or correcting the identification. The descriptions that 

 follow apply to adult trees only. 



ARTIFICIAL KEY TO SPECIES. 



Anthers broader than long, usually kidney-shaped, and opening by slits that 



when joined are nearly horseshoe-shaped Renantherese 



Valves completely inclosed: 

 Lid hemispheric: 



Veins running longitudinally 1 



Veins spreading from midrib: 



Leaves of adult trees mostly opposite 3 



Leaves of adult trees alternate : 



Leaves oblique, broad 9 



Leaves not oblique, narrow: 



Leaves equally green above and below 2, 12 



Leaves paler beneath 8 



Lid not hemispheric: 



Leaves equally green above and bel< >w 4, 5 



Leaves paler beneath 6, 7 



Valves partly exserted: 

 Lid hemispheric: 



Leaves equally green above and below: 



Fruits semiovate 13 



Fruits urn-shaped 16 



Leaves paler beneath 14 



Lid not hemispheric 15 



Valves completely exserted: 



Lid hemispheric 10 



Lid sharp-pointed 11 



Anthers not or hardly broader than long, opening by two pores Porantherex 



Valves deeply inclosed: 



Leaves equally green above and below 23 



Leaves paler beneath 17 



Valves completely but not deeply inclosed : 



Leaves of adult trees broad 21, 22 



Leaves of adult trees elongated: 



Umbels paniculated 23 



Umbels solitary: 



Flowers in threes 18 



Flowers not in threes 19, 20 



Umbels solitary or racemose 24 



Valves barely inclosed 25 



Anthers as long as or longer than broad, opening by nearly parallel slits 



Parallelantherea;. 

 Valves completely inclosed: 

 Umbels solitary: 



Leaves equally green above and below: 



Leaves opposite 42 



Leaves alternate : 



Flowers mostly in threes 42, 62 



Flowers 3 to 8: 



Calyx angled 62 



Calyx not distinctly angled 32, 51 



