Potaraogeton. 83 



3 — 5 cm lata (raro elliptica) plus minus coriacea, aggregata, area mediana reticulata 

 distincta instructa. Stipulae herbaceae. Fructus minores, acute carinati. 



In stehenden Gewässern und an schlammigen vom Wasser verlassenen Orten. 



Nota. Cl. Fryer (in Journ. of Bot. XXVIII. [4 890] 321) ipse P. coriaceum suura formam 

 P. Zixii esse declarat. 



Subvar. major (Fryer). — P. coriaceus var. major Fryer in Journ. of Bot. 

 XXVIII. (i 890) 321. — P. lucens F. terrestris major Tisel. Potam. suec. exsicc. n. 66. 



— Planta robuslior. 



Var. ö. connecticutensis Morong ap. A. Bennett in Journ. of Bot. XXXIX. (1901) 

 199. — P. lucetis var. Connecticutensis Bobbins in A. Gray, Man. ed. 5. (1867) 488; 

 Morong in Mem. Torr. Bot. Club III. (1893) 2, 31. — P. angustifolius var. Connec- 

 ticutensis A. Bennett 1. c. (190*0- — Caulis flexuosus Folia acuminata. Fructus major, 

 3,5 — 4 mm longus et ca. 3 mm latus, distincte tricarinatus stylo ventrali. 



Nordamerika: Connecticut, Saltonstalls Pond, Fast Haven (Bobbins); New York, 

 Pine Plains (Hoysradt). Ähnliche Formen in Vermont. 



Var. s. methyensis. — P. angustifolius [P. Zixii) var. Methyensis A. Benn. in 

 Journ. of Bot. XXIX. (1 891) 151; Morong in Mem. Torr. Bot. Club III. 2. (1893) 30. 



— P. Zixii Macoun, Cat. of Canad. pl. (l 890) 371; A. Benn. 1. c. (1891). — Folia 

 media elongata angustata, folia superiora ovata, semicoriacea, longislipulata. Fructus 

 minores. Embryo magis curvatus. 



Nordamerika: Methye Lake nördlich von Buffalo Lake 57° 30" (Macoun). 



Var. t. porrectifolius A. Bennett in litt. — Folia submersa ca. 3 dm longa et 

 ca. 2 cm lata. Folia natantia ca. 1 dm longa et 3 cm lata. 



Nord-Amerik a. 



Var. rj. gracilis A. Bennett in litt. — Planta nana, gracilis. 



Nord-Amerika. 



Nota. Ex cl. A. Bennett in litt, formae americanae partim valde dubiosae remanent 

 dum specimina tantum pauca adsunt. 



Formae terrestres non raro in paludibus et locis exsiccantibus inveniuntur (conf. 

 Cham, et Schlechtd. in Linn. II. [1827] 201; Fryer in Journ. ofBot. XXV. [1888: 309). 



Nota. In Hungaria meridionalis (ex cl. Simonkai in Aschers, u. Graebner, Synops. mittel- 

 europ. Fl. I. [1897] 321) rhizoma tuberosum ab hominibus et animalibus gustatum est. 



44. P. malainus (P. malaina) Miq. Fl. Arch. Ind. (1871) 46; A. Benn. in 

 Journ. of Bot. XXIX. (1891) 154. — P. Gaudichaudii Cham, et Schlechtd. in Linnaea 

 II. (1827) 199? A. Benn. in Journ. of Bot. XXXI. (1893) 132. XXXIII. (1895) 373; 

 Journ. Linn. Soc. XXXVI. (1903) 194. — P. mucronatus Presl, Epimel. bot. (1849) 

 2 45 nee Schrad. — P. japonicus Franch. et Sav. Enum. pl. Jap. II. (1879) 15 nomen 

 solum. conf. A. Benn. in Journ. of Bot. XXX. (1892) 228. — P. Wrightii Morong in 

 Bull. Torr. Bot. Club XIII. (1886) 158 t. 59; A. Benn. in Journ. of Bot. XXVIII. (1890) 

 298. — P. lucens Cuming n. 1381; Vidal, Phan. Cuming Philipp. 155 ex Bolfe in Journ. 

 of Bot. XXIV. (1886) 60; K. Schum. in Fl. brasil. III. 3. (1894) 688 p. pte. nee L. — 

 P. tretocarpus Maxim, in Herb. div. A. Benn. in Journ. of Bot. XXIX. (1891) 154. — 

 Caulis internodiis ca. 3 cm longis. Folia elliptica vel lineari elliptica, ca. 5 — 8 cm 

 longa et 2 cm lata, utrinque acuta rarius apice acuminata vel obtusa mucronata, breviter 

 (superiora longe) petiolata, nervo medio crasso excurrente mucronata, juniora prae- 

 sertim margine serrulata, 7-nervia, nervis seeundis validioribus, tertiis marginalibus ob- 

 soletis, reticulati-venosa, membranacea pellucida, tenuia. Stipulae 2 fere cm longae, 

 membranaceae, latae, laxae, amplexicaules, virescentes. Pedunculi teretes, graciles, 

 foliis longiores, ad 1 fere dm longi. Spica ca. 2 cm longa, gracilis, cylindracea, 1 6 — 

 1 8 flora, floribus quam in lucenti multo minoribus. 



Nota. Planta gracilis P. lucenti admodum similis inflorescentiae forma difTert. 



Westindien: Cuba (Wright n. 3714!); Jamaica (Mac Fadyen!). 



Asien: Tibet; Kashmir 1900 m (Schlagintweit Cat. n. 10449 conf. A. Bennett 

 in Journ. of Bot. XXVIII. [1890] 298); Java (Zollinger n. 3778!); Sumatra (Beccari 



6* 



