Juncus. 185 



94. J. nodosus L. Spec. pl. ed. 2. (1762) 466; Rostkovius, de Junco (1801) 38 

 t. 2, f. 8. — /. Rostkovii E. Mey. Syn. Juncor. (1822) 26; Laharpe Monogr. Jone. 

 (1827) 133; Kunth, Enum. pl. III. (1841) 332; Torrey, Fl. N. York II. (1843) 327. — 

 J. nodosus var. genuinus Engelm. in Transact. St. Louis Ac. II. (1868) 471; Watson, 

 Bot. Calif. II. (1880) 208; Buchenau in Flora (1886) 166, Monogr. Juncac. (l 890) 314 

 et Flora (1891) 73 (tub.); Britt. and Brown, 111. Fl. N. Un. States I. (1896) 392 f. 947: 

 Goville in Gontrib. Un. St. Nat. Herb. IV. (1893) 207. — Longitudine et latitudine 

 caulium, foliorumque, numero.capitulorum et florum maxime variabilis. Rhizoma diam. 

 0,5 usque 1,2 mm. Gaules erecti, graciles, 10 usque 40, raro 70 cm alti, diam. 0,7 

 usque 1, raro 2 mm, basi saepe tuberoso-incrassati; folia (caulina 2 usque 4) gracilia, 

 diam. 0,5 usque 1 mm; vaginae angustae; lamina folii supremi inflorescentiam supe- 

 rans. Inflorescentia composita vel decomposita (raro ad capitulum singulum redueta), 

 a bractea infimä superata, saepe contraeta, rarius diffusa; capitula 1 usque 30, diam. 

 8 usque 10 mm, ca. 6- usque 20-flora. Flores 3,5 usque 4 mm longi, straminei, 

 rubescentes vel fuscescentes ; tepala lanceolato-subulata, aequilonga, raro externa vel 

 interna breviora; stamina 6, tepala dimidia vix aequantia. Fructus perigonium supe- 

 rans, e basi ovatä triquetro-prismaticus, rostratus, valvulae apice cohaerentes; semina 

 ca. 0,5 mm longa, late obovata, subquadratim reticulata. 



Provinz der atlantischen und mittleren Unionsstaaten bis zu den 

 Rocky-Mountains: In Sümpfen, auf Kiesbänken und Flussufern: Canada bis British- 

 Columbien; nördliche Vereinigte Staaten bis Virginia, Nebraska, Nevada und Utah. 

 Mexiko: San Luis Potosi (Schaffner n. 551, t. Watson); Durango (Palmer n. 98, 

 391; formae gracillimae; n. 98 parva, vix 10 cm alta, n. 391 major, 24 usque 40 cm 

 alta — probab. huc ducendae). 



J. alpinus X nodosus. 



95. J. Torreyi Coville in Bull. Torr. Bot. Club XXII. (1895) 303 adnot. — 

 /. nodosus L. var. megaeephalus Torr. Fl. N. Y. II. (18 43) 326. — /. megaeephahts 

 Wood, Class book Bot., ed. 2. (1861) 724 non Curtis. Engelm. in Trans. St. Louis Ac. 

 II. (1868) 471; Buchenau, Monogr. Juncac. (1890) 316; Goville in Gontrib. Un. St. 

 Nat. Herb. II. (1894) 448; Britt. and Brown, 111. Fl. N. Un. St. I. (1896) 392 f. 948; 

 Small, Fl. southeast. Un. St. (1903) 259. — Rhizoma elongatum, diam. 1 usque 2 mm. 

 Gaules erecti, rigidi, diam. 2 usque 4 mm, 20 usque 100 cm alti, basi plerumque 

 tuberoso-incrassati; folia basilaria fugacia, caulina 2 usque 5; vaginae angustae; lamina 

 firma, teres, diam. 1 usque 2,5 mm. Inflorescentia contraeta vel conglobata, raro ultra 

 5 cm longa, a bractea infima et saepe a folio supremo superata; capitula pauca (3) 

 usque multa (ca. 20), densissime multi- (30- usque 80-)flora, diam. 10 usque 14 mm. 

 Flores ca. 5 mm longi, angusti, viridescentes, demum straminei; tepala lineari-subulata; 

 stamina 6, tepala dimidia vix aequantia; antherae oblongae, filamenta aequantes; stilus 

 longus. Fructus perigonium paullo superans, triqueter vel trigonus, prismatico-pyrami- 

 datus, rostratus; valvulae apice cohaerentes; semina 0,4 usque ; 5 mm longa, late 

 obovata, transversim reticulata, areis transversim lineolatis. 



Uni ons Staaten: An nassen Stellen und Ufern; von Canada und dem Ontariosee 

 bis Texas und Oregon. 



96. J. texanus (Engelm.) Coville in Small, Fl. southeast. Un. St. (1903) 259. — 

 J. nodosus L. var. ß. texanus Engelm. in Transact. St. Louis Acad. II. (1868) 471; 

 Buchenau, Monogr. Juncac. (1890) 316; Goville in Contr. Un. St. Nat. Herb. II. (1894) 

 449. — Rhizoma tenue, elongatum, diam. ca. 1 mm. Gaules 20 usque 60 cm alti, graciles, 

 diam. ca. 1,5 mm, basi tuberoso-incrassati; folia basilaria fugacia, caulina 3 usque 5; 

 vagina angusta; lamina gracilis, diam. 0,75 usque 1 mm. Inflorescentia composita, 

 anthelata, aperta; bractea infima frondescens saepe distans, plerumque inflorescentiam 

 aequans; capitula 2 usque 15, 10- usque 40-flora, diam. 12 usque 15 mm. Flores 

 angusti, cum fruetu 6 usque 8 mm longi, straminei, sive pallide ferruginei; tepala 

 lineari-subulata; stam. 6, tepala externa dimidia aequantia; antherae lineares, filamentis 



