108 

 KEY TO THE SPECIES OF DELISSEA. 



Flowers over 3.75 cm long, curvetl, white. 

 Branching shrulis ISi-'.i m high. 



Leaves laciniately lobed D. laciniata 



Leaves broailly cordate or ovate oblong subcntire, serrulate-dentate 



D. subcordata 



Stem simple erect up to 2 m high. 



Leaves oblauceolate or spathulate with sinuate margin D. sinuata 



Flowers less than 2..5 cm long, suberect, groonisli white. 

 Stem simple erect up to 10 m high (D. undulata). 



Leaves ovate oblong, corolla with three knobs D. undulata 



Leaves elongate-oblong on petioles more than one-half their leugtli, ((.((dla with a 



single dorsal knob D. fallax 



Branching shrubs. 



Leaves lanceolate or oblong dentate or serrulate on petioles of less than or one- 

 third their length D. rhytidosperma 



Leaves laciuiate, on petioles of one-fourth tlieir length or less, D. parviflora 



KEY TO THE SPECIES OF ROLLANDIA. 



Leaves slightly pubescent, or densely tomeutose underneath. 

 Leaves somewhat pubescent, especially along the nerves. 



Staminal column hairy, leaves lanceolate, corolla glabrous 



Eollandia lanceolata 



Staminal colunm glabrous, leaves broail (d.iovate, very shortly jictiolate, corolla ]iale 



reddish, pubescent Eollandia crispa 



Leaves tomeutose underneath. 



Eacemes long drooping (8-40 cm), corolla white or purplish, staminal colunm 



glabrous Rollandia Humboldtiana 



Eacemes shorter and erect. 



Leaves papilose hispid above, petioles and stems niurii-ate, anthers hairy along 



the base Rollandia calycina 



Leaves glabrous above. 



Staminal column glabrate, leaves large, 62 cm long, in cm broail.... 



Rollandia Kaalae 



Staminal column hairy, leaves elongate narrow 



Rollandia lanceolata tomentosa 



Leaves glabrous on both sides. 



Leaves pale whitish umlerneath. 



Calyx truncate, at the ape.x dentate. 



Leaves linear elongate, entire Eollandia angustifolia 



Leaves sinuately lobed to laciniate or subeutire. lanconlato 



Rollandia longiflora 



Calyx cylindrical, the lobes oblong, thin, 1 cm long, loaves lauccuhitr acuminate, 



18-22 em long, on petioles 2.8 em, with small lenticels 



Rollandia parvif olia 



Leaves dark purple underneath shining, oblauceolate, very sliortly acute, on short 

 margined petiole; inflorescence glabrous Rollandia purpurellifolia 



