120 Fr * Buchenau. — Juncaceae. 



Einzeln von Massachusetts bis Texas längs der Küste. Mihi ignotus. Planta dubia; 

 an hybrida? — Lamina subteres, anguste canaliculata maximo pretio est in determina- 

 tione J. dichotomil 



Nota. J. dichotomus cum J. tenui et speciebus affinibus turmam polymorpham format. 

 Formae dubiae haud raro occurrunt. 



§8; v. p. 102. 



18. J. brachyphyllus Wiegand in Bull. Torr. Bot. Club XXVI. (1900) 519; Small, 

 Fl. southeast. U. St. (1903) 257. — Gaules stricti, rigidi, 30 usque 50 cm alti, diam. 

 1 usque 2 mm, sulcati. Folia laxe vaginantia, caule */ 2 usque 3 / 4 breviora; lamina 

 plana, crassiuscula. Inflorescentia anthelata, angusta, 2 usque 6 cm longa; rami erecti, 

 in drepana brevia desinentes; bracteae infimae frondosae, inflorescentiam saepe superan- 

 tes. Flores 5 mm longi, straminei; tepala lanceolato-subulata, late membranaceo-mar- 

 ginata, interna distincte breviora; stam. 6, tepala dimidia aequantia; antherae lineares, 

 filamenta aequantes; stilus brevis. Fructus ovato-trigonus, obtusatus vel retusus, firmus, 

 tepala paullo distantia subaequans; semina ca. 0,5 mm longa, oblonga, pallide ferru~ 

 ginea, distincte albo-apiculata (costis ca. 12). 



Nordamerika: Bis jetzt nur bekannt aus Arkansas (Marcy, Hayden) und Idaho 

 (Heller n. 3410). 



19. J. confusus Coville in Proc. Biol. Soc. Wash. X. (1896) 127. — /. tenuis 

 var. congestus Engelm. in Trans. St. Louis Acad. H. (1866) 450; quoad pl. colora- 

 densis; Wiegand in Bull. Torr. Bot. Club XXVII. (1900) 520, XXX. (1903) 446. — 

 Caules graciles, stricti, tenues, 15 usque 60 cm alti; folia arcte vaginantia, caulibus 

 parallelis, sed ca. dimidio breviora; lamina planiuscula, in statu sicco involuta. Inflores- 

 centia pluriflorä, contraria, densa, a bracteä infimä frondosä longe superata. Flores 3 

 usque 4 mm longi; tepala aequilonga, dorso viridiuscula, ferrugineo-striata, late mem- 

 branaceo-marginata, externa acuta, interna obtusa; stamina 6, tepalis ca. dimidio bre- 

 viora; antherae lineares, filamentis breviores; stilus brevissimus. Fructus trigono-ovalis, 

 retusus; semina ca. 0,5 longa, oblique obovata, brevissime albo-apiculata. 



Provinz der Rocky-Mountains und der pacifischen Coniferen: Auf feuchten 

 Bergwiesen von Colorado, Wyoming und Montana westwärts bis Oregon und Washington. 



Nota. Species eximia, caulibus et foliis strictis parallelis, inflorescentia densa, tepalis 

 variegatis et fructu retuso praeclara. 



20. J. secundus Beauv. in Poiret, Encycl. meth., bot. supplem. III. (1813) 160. 

 — /. tenuis var. secundus Engelm. in Trans. St. Louis Acad. II. (1866) 450; Buche- 

 nau, Monogr. Juncac. (1890) 194; Britton et Brown, 111. Fl. N. Un. St. I. (1896) 386, 

 f. 930; Wiegand in Bull. Torr. Bot. Club XXVII. (1900) 515, XXX. (1903) 446. — 

 Claroviridis. Caules graciles, stricti, 25 usque 50 cm alti, sulcati, diam. usque 1 mm. 

 Folia arcte vaginantia; lamina recta, caule ca. 2 / 3 breviora, usque 1 mm lata. Inflo- 

 rescentia 3 usque 8 cm longa, aperta, anthelata; rami erecti, in drepana 3- usque 6- 

 flora desinentes; bracteae infimae frondescentes, inflorescentia breviores. Flores ca. 3 mm 

 longi, straminei; tepala aequilonga, paullo distantia, lanceolato-subulata ; stamina 6, 

 tepalis y 3 usque */ 2 breviora; antherae lineares, filamenta aequantes; stilus brevissimus. 

 Fructus trigono-ovatus, obtusus; pericarpium tenue; semina ca. 0,3 mm longa, irregu- 

 lariter obovata, apiculata. 



Auf trockenem Boden in der atlantischen Küsten-Region von Massachusetts 

 bis Nord-Carolina; einzeln auch in Missouri (Desoto, Hasse) und Illinois (Vasey); Lookout- 

 Mountains (Alleghany). 



Nota. J. monostichus Bartlett in Rhodora VII. (1905) 50, affinis J. dichotomo et secundo, 

 a quibus differt fructibus perparvis (2 mm longis, a tepalis adpressis occultis , triseptatis), foliis 

 basilaribus longis, i/ 2 usque 3 /4 culmum aequantibus, seminibusque magnis (0,5 mm longis) ovoi- 

 deis, longitudinaliter reticulatis (in quo cum J. Vaseyi congruit). — South of Anderson, Indiana, 

 leg. Ch. P. Smith. — Mihi ignotus. 



