158 HANDBOOK OF BROMELTACEiE. 



*** Leaves rosulate, broader and tliinner, siih//lahro}is. 

 * Spikes distichous. 



8. Allardtia. — Differs from Platystackys only in leaf. 



9. Wallisia. — Differs from Phytarhiza only in leaf. 



10. Vriesea. — Claw of the petals furnished with a pair of scales. 

 Leaf usually lorate. 



** Spikes not disticJioiis. 



11. Cyathophora. — Differs from Allardtia in inflorescence. 



12. CoNosTACHYs. — Differs from Vriesea in inflorescence. 



Key to the Groups. 

 Subgenus Strepsia (Nuttall) . . . Sp. 1. 



Subgenus Diaphoranthema (Beer). 



Leaves not more than J-| in. long . Sp. 2-8. 

 Leaves 1-2 in. long .... Sp. 9-15. 

 Leaves 2-3 in. or more long . . Sp. 16-19. 



Subgenus Phytarhiza (Visiani). 



Flowers white or yellow . . . Sp. 20-22. 

 Flowers reddish-lilac. 



Spikes simple .... Sp. 23-32. 



Spikes panicled .... Sp. 33-39. 



Subgenus Platystachys (Beer non K. Koch). 



Spikes very dense. 



Spikes simple . . . . Sp. 40-60. 



Spikes panicled. 

 Dwarf species . 

 Tall species 

 Spikes moderately dense. 

 Spikes simple 

 Spikes panicled 

 Spikes lax. 



Spikes simple 

 Spikes panicled 



Subgenus Pseudo-Catopsis. 



Sp. 61-79. 

 Sp. 80-121. 



Sp. 122-127. 

 Sp. 128-133. 



Sp. 134-139. 

 Sp. 140-147. 



Spikes simple .... Sp. 148. 

 Spikes panicled .... Sp. 149-166. 



