Najas. 15 



Var. a. spinosa Rendle in Trans. Linn. Soc. 2. Ser. V. (l 899) 413. — Folia anguste 

 linearia margine et dorso valde dentata, dentes marginales laminae latitudinem subaequantes, 

 vel vix breviores. Semen 1,5 — 1,75 mm longum. 



Ost-Indien (Wight n. 2793). 



17. N. Kurziana Rendle in Trans. Linn. Soc. 2. Ser. V. (1 899) 413 t. 41 figg. 116 — 

 121. — Parva, caulis gracillima; folia tenuia, c. 15 mm longa, utrinque denticulis minutis 

 numerosis instructa ; vagina breviter auriculata. Semen ellipsoideo-oblongum, 1 mm longum, 

 conspicue areolatum, seriebus areolarum quadratarum circa 1 6 (Fig. 4 U). 



Ost-Indien: Nord-Bengalen zwischen Kishenganj und Oolabena (Kurz). 



18. N. tenuissima A.Br. ex Magnus, Beitr. (1870)24, 45, t. 5 figg. 13, 14; Rendle 

 in Trans. Linn. Soc. 2. Ser. V. (1 899) 414. — N. minor var. tenuissima A. Br. in Journ. 

 of Bot. II. (1864) 277. — Laxissima, folia tenuissima, circa 12 mm longa, dentibus in 

 utroque margine circa 8 vix protrusis. Semen anguste ellipsoideum, 2,5 mm longum, areolis 

 elongatis quadrangulis lineatum. 



Finnland: Wesijärvi-See Tavastland-Gebiet (Norrlin), nahe Borga (Saelan). 



1 9. N. gracillima (A.Br.) Magnus, Beitr. (1 870) 23 ; Morong in Mem. Torrej Bot. Club 

 III. 2. (1893) 61 t. 68; Rendle in Trans. Linn. Soc. 2. Ser. V. (1899) 414 t. 41 figg. 122 — 

 125. — N. indica var. gracillima A. Br. ex Engelm. in A. Gray, Man. Bot. ed. 5. ( I 8 68) 

 681. — Caules filiformes, folia angustissime linearia, 2 — 2,5 cm longa, margine inferne 

 integro, superne denticulis spiniferis vix prominulis distantibus instructo. Semen lineari- 

 oblongum, 2,5 — 3 mm longum, areolis in series numerosas ordinatis et duplo longioribus 

 quam latis (Fig. 5D). 



Östliche Vereinigte Staaten. 



20. N. Kingii Rendle in Trans. Linn. Soc. 2. Ser. V. (1899) 415 t. 41 figg. 126 — 

 I 31, ib. (l 900) 4 42. — Gaules elongati, effusi, apice dense ramulosi; folia lineari-angustata, 

 3,5 cm longa, dentibus in utroque margine 16 — 19, obtuse triangulis, laminae latitudinis 

 dimidium aequantibus vel brevioribus. Semen ellipsoideum 0,75 — 2 mm longum, areolis 

 parvis subsexangulis, in seriebus circa 30 (Fig. 5J. — C). 



Süd-Andamanen (King); Singapore; Tonkin (Balansa n. 4651). 



2 I . N. lacerata Rendle in Trans. Linn. Soc. 2. Ser. V. (1 899) 41 6 t. 41 figg. 1 32 — 

 13 8. — Rigidula, dichotome ramulosa; folia linearia ad 2,5 cm longa, dorso carina 

 dentata instructa , dentibus in utroque margine circa 1 2 , laminae latitudinis dimidium 

 aequantibus vel minoribus ; vaginae auriculae grosse-dentatae. Fructus ignotus (Fig. §E—F). 



Ost-Indien: Tinnevelly (Beddome n. 8202); Madras (Wight); ?Bengal (Clarke 

 n. 4366, ohne Blut.). 



22. N. foveolata A. Br. ex Magnus, Beitr. (1870) p. vn. ; Rendle in Trans. Linn. Soc. 

 2. Ser. V. (1899) 416 t. 41 figg. 139—144 et ib. (1900) 443. — N. indica Zoll. Syst. 

 Verzeichn. Heft 1 u. 2 (1854) 74 non Cham. — Caules elongati patentes, folia linearia 

 superne valde angustata vel setacea, 1,5 — 3,5 cm longa, in utroque margine denti- 

 culis parvis subtriangulis aculeatis 6 — 20 instructa; vagina breviter auriculata. Semen 

 2,25 — 2,5 mm longum, areolis distinctis, in medio seminis subquadratis, in seriebus circa 

 20 (Fig. 4TF). 



Der Typus findet sich in Ost-Indien (Clarke n. 31 879, Hooker f. n. 639 u. s. w.); 

 Sumbawa (Zollinger n. 3398); Timor; Philippinen; Molukken; Japan: Yokoska 

 (Savatier n. 1348). 



Var. a. minor Rendle in Trans. Linn. Soc. 2. Ser. V. (1899) 417. — Folii denti- 

 culi quam in typo minus conspicui, y 3 — l L laminae latitudinis aequantes. Semen 1,5 mm 

 longum, manifeste areolatum, areolis subquadratis vel multangulis, in seriebus 1 4. 



Ost-Indien: Kaktee Tank bei Belgaum. 



2 3. N. falciculata A. Br. in Journ. of Bot. II. (1864) 278; Rendle in Trans. Linn. 

 Soc. 2. Ser. V. (1899) 417 t. 42 figg. 145 — 151. — Caules graciles elongati erecti, ramis 

 brevibus ascendentibus ; folia anguste linearia, 1,6 — 2 cm longa, cum denticulis in utroque 

 margine 18 — 25, i / i — 1 / i laminae latitudinis aequantibus; vaginae auriculae saepe falcatae. 



