(13) — 105 — 



Style relatively large, bent over towards the dorsal edge. 



Hab. : Lacs de Numasakii. Japon. Leg. Abbé Faurie, n° 20, 

 Aug. 17, 1899. 



With the habit of P. javanicus Haskl. this differs from that and 

 ail other species by the structure of the leaves which is more like 

 a Sagittaria, and by the remarkable spike of fruit like a small 

 pedinatus one (on a hybridus-type species) and by the fruit 

 which bears some resemblance to P. condylocarpus Tausch in 

 the graminifoUus-section. 



It is possible that some poor non-fruiting spécimens named 

 P. Midiihihimo Makino may belong hère leg. Abbé Faurie 

 n° 10806, Aug. 8, 1893, but my exemple is too poor to be sure. 



19. Potamogetones madagascarienses. 



I am not aware of any list of the Potamogetons of this Island, 

 and it may be well to give those known to me. 



1. P. natans L. 



Humblot, n° 214. Herb. Kew. 



2. P. polygonifolius Pourr. 

 Hillebrandt, n° 4031, Herb. Brit. Mus. 

 Hillebrandt, n° 3519, « Imerina. » 



3. P.fluitans Roth? 



Baron, n° 3492, 4112, 4136, 4498 in Herb. Kew. 

 Hillebrandt, n° 3519, Herb. Brit. Mus. 



4. P. angiistifolius Bertch et Presl. (P. Zizii Roth). 

 Humblot, n° 352. Herb. Kew. 



5. P. lucens L. subsp. vaginans (Bojer sp.). 



« Lacu Ytassi. Sianark prov. Imani » Herb. Brit. Mus. 



6. P. javanicus Haskl. 

 Baron. n° 324, 995, 4113, 4137. 

 Baron, n° 644. Central provinces. 

 Humblot, n° 330. 

 Rutenberg. Antananaro. 

 Hilldebrandt, n° 4066. Andrangoloaha. 

 Environs of Tananarivo. M. Goudot in herb. 



7. P. 'pedinatus L. 

 Kew Herb. 



8. P. intemtptus Kitab. 

 Humblot, n° 357. Herb. Kew. 



