(11) — 103 — 



16. P. striatus Ruiz et Pavon. 



A spécimen from the original locality leg. Doinbey is in the 

 herbarium; otbers so named are not so. 



1. «P. striatum R. et P. Brazil, n° 1442. Gardner, 1838» 

 = P. Ascliersouil Ar. Benn. Jour. Bot. 1893. 



2. « P. striatum Ruiz et Pav. Drege. Port Natal et Afrique 

 Méridionale. Reçu en 1839 » = P. pusillus L. var. africamis 

 Ar. Benn. 



It is one of tbe rarest species of the genus. The following I 

 believe are ail the records. 



Peru. Prov. Chancey. Donabey !. 



Peru. Callao, D'Orbigny 1850, herb. De Candolle!. 



Ecuador. Andes, R. Spruce n° 5886!. 



Chili. Araucaria in lacu Budi. T. Philipi in herb. Bennett 1 . 



Argentine Republic. Prov. Jying. Laguna de Sauçai. 

 R. E. Pries! ex Herr Baage. There is a type spécimen in herb. 

 Boissier « ex herb. Pavon !. » 



In Sir J. E. Smith's herbarium there is a spécimen, no date : 



«N° 33. Potamogeton fol. linearibus longitudinalis striatus 

 caule immerso. Hab. in aquis demum Lima. » « None of ours see 

 the sibs of the leaves J. E. S. » 



17. P. asiaticus Ar. Bennett. sp. nov. 



Stems terete, striate. about 15 inches high branching only at the 

 leaf-insertions. at nearly a right angle, many of the branches with 

 3-5 leaves only. and agglomerated at the apex into a winter-bud, 

 or gemmse. 



Upper (floating) leaves oblong 6 lin. long attenuated into the 

 pétiole (pétioles 3-6 lin-long); 9-nerved with nurnerous cross 

 nerves, immersed in the chain-like areolation which completely 

 covers the leaves, and is continued down the pétiole on either side. 

 Accompanaying thèse oblong leaves are others, linear-attenuate, 

 with the structure of the lower leaves, an unusual occurance. 



Middle (submerged) leaves linear-lanceolate acuminate; 

 10-14 lin long. 



Lower (submerged) leaves linear-setaceous 7-nerved, nerves not 

 reaching the margins, but forming a compact central network of 

 nerves with elongated interspaces; variable in length. 



1 Named P- austral/ s Phil. 



