52 Fr. Buchenau. — Alismataceae. 



Var. australis Smith in Bull. Torr. Bot. Club. XXIV. [l 897) 20 t. 291. — Caulis 

 4 dm altus, folia ca. 2 dm longa; lamina 8 usque 10 cm longa, ovato-elliptica, obtusa, 

 lobis basilaribus obtusis; pedunculi fertiles 10 usque 13 mm longi, bracteis longiores; 

 fructiculi (an maturi? Fr. B.) 3 usque 3,5 mm longi. 



An Sümpfen und Wasserlöchern vou Pennsylvanien bis Alabama. 



Nota. Fructiculos nonnullos tantum vidi. Species certc S. latifoliae valde affinis, seil 

 differt rostro fructiculi erecto, curvato. 



17. S. Engelmanniana Smith in Rep. Miss. Bot. Gard. VI. (1894) 15, t. 9. — 

 S. variabilis var. (?) gracilis Watson in A. Gray, Man. ed. 6. (1889) 555; Britton and 

 Brown, 111. Flora North. Un. $tates i. (i 896) 88. — Perennis; stolonifera et probabi- 

 liter tuberifera. Caules erecti, graciles, subangulosi, 2 usque 4 dm alti, folia plerum- 

 que aequantes. Folia longe petiolata; lamina 8 usque 20 cm longa, apice obtusa vel 

 acuta; lobi lineares, 1 usque 5 mm lati, basilares terminalem aequantes (vel longiores). 

 Inflorescentia racemosa, verticillis 4 usque 6; bracteae lanceolatae, acutae, 8 usque 

 12 mm longae; pedunculi graciles, bracteis longiores, fertiles 10 usque 14, steriles 10 

 usque 20 mm longi; flores conspicui, diam. 2 usque 3 cm; sepala ovata; petala multo 

 majora, orbicularia; stamina 18 usque 23. Fructus globosus, diam. 12 usque 14mm; 

 fructiculi magni, 4 mm longi, obovati, utrinque alati, lateribus alatis (alis 2 vel 3); 

 rostrum longum erectum. 



Am Rande von Sümpfen von Massachussets bis Delaware, selten. Für Florida 

 zweifelhaft. 



Nota. In planta a celeb. E. Tuckermann in Massachussets lecta lobos basilares contra 

 diagnosin Smithii terminali longiores observavi. 



Nota. Species longirostrae affinis, differt praecipue foliis linearibus, pedunculis longioribus, 

 gracilioribus, fructiculis angustioribus. 



F. Folia emersa lineari-lanceolata, lanceolata vel ovata, non sagittiformia. 

 a. Lancifoliae. Filamenta non dilatata. Spec. 18 — 20. 



18. S. lancifolia L. Syst. nat. ed. 10. II. (1759) 1270; L. Amoen. acad. V. 

 (1760) 409; Plumierus, Plant, amer., fasc. V. (1757), t. 116; Mich. Fl. bor. am. II. (1803) 

 189. — S. falcata Pursh, Fl. Amer. sept. (1814) 397; Botan. Repository V. (ca. 1815) 

 t. 333; Descourtilz, Flora pittoresque Antill. VIII. (1829), 201, t. 498; Kunth, Enum. 

 pl. III. (1841) 158: lancifolia L., 159 falcata Pursh, angustifolia Lindl., Sellowicma 

 Kunth. — S. plantaginifolia Martens et Galeotti, Enum. pl. Mex. in Bull. Acad. 

 Belg. IX. (1842) 379; Miq. Symb. Fl. surin. in Linnaea XVIII. ( 1 844) 353; Seubert 

 in Fl. brasil. fasc. VIII. (1847) 111; Griseb. Fl. Brit. W. Ind. Isl. (1864) 505; 

 Buchenau in Abh. Nat. Ver. Brem. II. (186 8) 25, 44; Micheli in DG. Monogr. 

 Phaner. III. (1881) 72, cum var. a. major, ß. angustifolia, y. media, 6. papulosa', 

 Buchenau in Engler's Bot. Jahrb. II. (1882) 487; Smith in Rep. Miss. Bot. Garden VI. 

 (1864) 21 (cum var. falcata Pursh, p. 21 et angustifolia Griseb. p. 33) t. 16; Britton 

 et Brown, 111. Fl. North. Un. States I. (1896) 90. — Perennis (an stolonifera?). Planta 

 valida rigida, maxime variabilis. Caulis erectus, usque 2 m altus, folia superans, teres 

 vel subangulosus. Folia emersa magna, coriacea, pallide viridia, pseudopenninervia, 

 nunquam hastata vel sagittiformia. Inflorescentia magna, racemosa vel panniculata ; 

 bracteae ovatae, liberae; pedunculi graciles, erecti, steriles longiores; flores magni, 

 diam. usque 6cm(!); petala magna, alba; filamenta subulata, pubescentia; fructiculi 

 variabiles, 2 usque 3 mm longi, anguste alati, dimidio obovati, vel fere falcati, plerumque 

 oblique rostrati. 



Var. a. major Micheli 1. c. 73 (c. synonymo S. Selloiviana Kunth). — Planta 

 magna. Lamina ovata vel late lanceolata, basi sensim attenuata, apice obtusa usque 

 longe acuminata. Bracteae liberae, 10 usque 25 mm longae. Pedunculi fertiles ca. 30 mm 

 longi. Antherae filamenta aequantes. Fructiculi breviter rostrati. 



