(9) — 101 — 



small leaved. I hâve seen no such spécimens thence as var. densi- 

 folias Meyer, or var. macropkyllus Blytt. The distribution of 

 P. perjoliatus is somewhat peculiar. With the exception of 

 Algeria and Morocco, I know of no African habitats ; while in 

 N. America it extends from 62° N. Lat, soutk to Florida! 

 S fc Lucia! and in Central America in Guatemala! Absent from 

 S. America; rare in Australia; and not recorded from Polynesia. 

 In Asia it extends from 70° N. Lat.! to 8° N, Lat. (Ceylon!). 



13. Potamogeton trichoides Chain.! in Linnsea II, 

 p. 1827 = P. tiïberculatas Ten.! ap. Gussone in Ad. fl. neapl. 

 si/Il ap. 5, 4, 1842 = P. monogynus Gay! in Coss et Gérai. 

 Supp. Cat. Fl. Paris 89, 1843 = P. pusillus L. p capillaris 

 Gaud. Fl. helv. I, 479, 1828 teste Fieber = P. pusillus L. 

 L. 8 trichoides Kunth Enum. 3, 137, 1848 = P. Phialx Post ! 

 Bidl. Herb. Boiss. I, 409, 1893 = P. condylocarpus Tausch! in 

 Flora XIX, 423, 1836. — « Potamogeton 8800. Drege, Port Natal 

 et Afrique méridionale. Reçu en 1839. » « Zwartkops river in 

 Uitenhage Division. » — Mixed with this are fragments of 

 P. pectinatus L. An interesting extension of the range of this 

 species about 4000 miles to the south of its other African record; 

 i. e. : «Algeria» Cosson in herb. Vindob!. « Algeria. Lac de 

 Monyain » Batt. et Trab. Fl. de l'Algérie 9, 1884. 



The original plant was characterised by ■ one-veined leaves, 

 and fruit without any cresting on the keel (carina) 1 . Fieber 

 figures it with 3 veined leaves. The South African spécimen is 

 not typical P. trichoides, but near the var. Timmeri Caspary, but 

 as Schumann in Fl. Brasil. 111, 710, remarks, the species is very 

 variable in the fruit. 



In Europe it entends from Sweden! to Sicily! and from 

 England! to Lithuania! 



The only Asiatic record is Ante Libanus Post in herb. 

 Boissier !. I cannot separate P. PJiiahe Post except as a variety from 

 trichoides. The N. American record 2 was an error for P. confer- 

 voides Reick. ! 



Between the type and P. condylocarpus Tausch there is of 

 course much différence, but so many occur Connecting the two, 



1 Linnœa 1. c, t. 4, f. 6. 



2 P. trichoides Tuck. in Grav's M an. N. U. S., 457. 1848. 



