20 52. LYTI III \rT I . 



(2) Leaves oblanceolate, spathulate or olwvate, flowers at the axils of tlio 



leaves from the top to the middle, not forming a distinct spike. (3) 

 Leaves rounded, flowers in a distinct spike R. rotundiflora. 



I E. indica. 



( 3 ) Leaves obovate \ 



I Ii. tndica var. vltgmosa, 



Leaves lanceolate /'. <!< n*ijl<>r var. foni/.^i,/>i. 



Rotala densiflora KUHM var. formosana TI AY AT A in MATST-M. et HAY ATA 

 Knnm. PI. Formos. p. 149. Annual herl), very glabrous, b,-ise n-]>ent, stem 

 tetragonous, 14-15 cm. high. Leaves opposite or ternate, sessile, linear-oblong, 

 entire, 1 cm.-1.5 cm. long, 4-3 mm. broad. Flowers axillary, sessile, solitaiy, 

 minute, minutely 2-bracteolate, bracteoles linear 1.5 mm. long. Calyx tubuloso- 

 campanulate 2 mm. long, dentate, primary teeth 5 acute valvate as long as 

 petals, with appendix at the sinus. Petals 5, inserted at the throat of calyx, 

 rounded, obtusely acuminate, very small. Stamens 5, inserted at the middle 

 of calyx-tube, filaments filiformed. Ovary olxwoid, immersed within the calyx- 

 tul)o, 5-celled ; style short; ovules ce, placenta axial. Capsules not yet 

 known. 



HAH. Pachina, Taihoku. 



Rotala indica KCEHNE ; MATOUM. et HAYATA Enum. PI. Formos. p. ] 49. 

 HAE. Bankinsing. 

 ]3iSTRiB. Malaya to Japan. 



Rotala indica var uliginosa K<I:UM: ; MATSUM. et HAYATA Ennm. PI. 

 Formos. p. 150. 



HAB. Taihoku. 



DISTRIB. Malaya and India. 



Rotala leptopetala KCEHNE; MATSUM. et HAYATA Ennm. PI. Formos. 

 p. 150. 



HAH. Taito, Kisaijurokuslia, Ivoshun, Takow. 

 DISTRIB. China, Loo-choo, India, Malaya. 



Rotala mexicana CH. et Sen. ; MATSUM. et HAYATA Enum. PI. Formos. 

 p. 150. 



HAH. Taihoku, 



