Juncus. 1 73 



Clavis specierum. 



A. Fructus perigonium conspicue superans, longe rostratus. 

 Bracteae florum membranaceae, albae. Stam. 6. Südwest- 

 Europa, Nordwest-Afrika 82. /. heterophyllus. 



B. Fructus perigonium aequans vel superans, mucronatus vel 

 breviter rostratus. 



a. Folium frondosum unicum, ca. in medium caulem in- 

 sertum, strictum, crassum, unitubulosum, pungens, usque 

 100 cm longum. Stamina 6. Maine, Neu-Schottland, 

 Neu-Braunschweig 83. J. militaris. 



b. Folia frondosa caulina nonnulla, linearia, unitubulosa, 

 perfecte septata, caule longiora. Stamina 3. California, 

 Vancouvers-Insel 84. J. supiniformis. 



c. Folia frondosa basilaria et caulina tenuia vel setacea, 

 pluri- vel bitubulosa (caulina rarius pseudo- unitubulosa). 

 Stamina 3, rarius 6. Europa, Nord-Afrika, Neufund- 

 land 85. /. supinus 



82. J. heterophyllus Dufour in Ann. sc. nat. V. (1825) 88. — J. atlanticus 

 Laharpe, Monogr. Jone. (1827) 128. — /. lampocarpus Ehrh. var. heterophyllus 

 Duby, Botan. gall. I. (1828) 477. Kunth, Enum. pl. III. (1841) 334 (sub J. uliginoso 

 Roth); Goss. Notes pl. crit., rares ou nouvelles France II. (184 9) 65; Pariatore, Fl. 

 ital. II. (1852) 342; Franchet in Billot, Annotations fl. France et Allemagne (1855 — 62); 

 Gren. et Godron, Fl. France III. (1855 — 56) 344. — *J. Mimizani Guilland ined. 

 in herb. plur. « Goss. et Dur. Explor. sc. Algerie II. (1854 — 67) 264. Gennari, Specie 

 et varietä fl. sarda (1867) 21; Barbey, Fl. sard. Comp. (1884) 62 et 188; Buchenau 

 Monogr. Juncac. (1890) 296; Coutinho in Bol. Soc. Broteriana VIII. (1890) 108; 

 Trabut in Battandier et Trab. Fl. de 1' Algerie, 2. ed. (1895) 87, t. 2; Aschers, und 

 Graebn. Synops. mitteleur. Fl. II. 2. (1904) 463, adnot. — Fluitans vel natans, raro 

 repens ; partes emersae glaucae. Radices apice saepe incrassatae (?). Rhizoma nulluni. 

 Caules basi ramificati, submersi: pallidi, nitidi, elongati, teretes vel angulosi, emersi, 

 teretes, firmi. Folia submersa: (hiemalia) filiformi-setacea, tenera, emersa: crassa, 

 rigida (diam. usque 6 mm), cauli subaequilonga (10 usque 20 cm longa), teretia, uni- 

 tubulosa, septis perfectis, manifestis intereepta; auriculae magnae, obtusae. Inflores- 

 centia ereeta, composita; rami elongati; capitula 6 usque 18, discreta, 2-usque 6-flora; 

 flores magni, distinete peduneulati, ca. 6,, cum fruetu 8 mm longi; tepala oblonga, 

 obtusa, fuscescentia , albo-marginata, aequilonga vel interna longiora; stamina 6, 

 tepalis breviora; antherae lineares, filamentis plus quam duplo longiores; stilus longus. 

 Fructus longe exsertus, trigono-ovalis, in rostrum longum attenuatus, ferrugineus; 

 semina ca. 0,5 mm longa, sphaerico obovata, vix apiculata, ferruginea, reetangulariter 

 reticulata. (Iconem v. p. 174). 



Atlantische und westliche Mediterran-Provinz. In Gräben, stehenden und 

 langsam fließenden Gewässern vom mittleren nach dem südwestlichen Frankreich, 

 Portugal, Spanien?, Marokko, Algier, Sizilien, Sardinien, Corsica, Toscana. 



83. J. militaris Bigelow, Florula bostoniensis, ed. 2. (1824) 139; Kunth, Enum. 

 pl. III. (1841) 361 (inter spec. dubias laudatur) : Bigelow in Beck, Bot. N. and Middl. 

 Un. St. [1833] 372; Gray, Manual, ed. 2. (1856) 482; Engelm. in Trans. St. Louis 

 Ac. II. (1868) 460; Buchenau, Monogr. Juncac. (1890) 298; Britton and Brown, 111. 

 Fl. N. Un. St. I. (1896) 391, f. 944 (minus bona). — Rhizoma horizontale, elongatum 

 in ima aqua repens diam. 2 usque 3 mm, e gemmis numerosis folia capillaria, viridia, 

 fluitantia, usque 120 cm longa, unitubulosa, perfecte septata emittens. Caules singuli, 

 erecti, rigidi, 40 usque 120 cm alti, teretes, ex aqua emergentes; folia basilaria (6?) 

 cataphyllina straminea, usque 15 cm longa; folium frondosum unitubulosum, perfecte 



