Juncus. 245 



Inflorescentia e capitulis 2 usque 6 (in var. panniculato 



usque 1 2) composita, umbelloides vel anthelata. Stigmata 



longissima. Fructus imperfecta trilocularis 179. /. latifolius. 



b. Tepala aequilonga (raro in J. falcato interna sublongiora). 



Stigmata longa. 



a. Fructus perigonium conspicue superans, imperfecte 

 trilocularis. Tepala interna obtusissima, latissime albo- 

 marginata. Semina ca. 0,4 mm longa, obovata . . 180. J. obtusatus. 



ß. Fructus perigonium aequans (in var. prominens dis- 

 tincte longior), triseptatus usque trilocularis. Tepala 

 interna ovata, obtusa, late fusco-marginata. Semina 

 majora, plerumque 0,6 usque 0,75 mm longa. . . 181. J. falcattcs. 



177. J. longistylis Torr, in Emory, Un. St. and Mex. Bound. Surv. II. (1859) 

 223. — /. Menziesii R. Br. var. californieus Hook, et Arn., Bot. of Cptn. Beechey's 

 Voyage (4 841) 402. Engelm. in Trans. St. Louis Ac. II. (1866) 453, (1868) 496; 

 Watson, Un. St. Explor. fort. Parallel, Bot. (1871) 357; Watson, Bot. Calif. II. (1880) 

 208; Buchenau, Monogr. Juncac. (1890) 424; Britt. et Brown, 111. Fl. N. Un. St. I. 

 (1896) 388 f. 936 (mala; tepala acuminata depicta sunt). — Viridis. Stolones graciles, 

 2 usque 5 (raro 8) cm longi. Caules graciles, diam. ca. 1 mm. Auriculae conspicuae, 

 obtusae; folia caulem vix dimidium aequantia. Inflorescentia plerumque contracta, 

 a bracteä infimä non superata; bracteae florum hypsophyllinae, membranaceae, pallidae. 

 Flores ca. 5 mm longi, variegati; tepala subaequilonga, medio dorsi viridiuscula, lineis 

 2 castaneis notata, marginibus latis, membranaceis ; stamina tepalis ca. duplo breviora; 

 antherae lineares, filamentis sublongiores; stilus longus sed ovario brevior. Fructus 

 tepala aequans, trigono-ovatus, obtusatus, mucronatus; semina 0,55 usque 0,7 mm 

 longa, oblique obovata, apiculata, regulariter reticulata, areis transversim lineolatis. 



Provinzen der Prairien und der pacifischen Goniferen: Auf Sand- und 

 Kiesbänken an Gewässern, verbreitet von Neu-Mexiko, Colorado und Nebraska an bis 

 Galifornien und nordwärts zum Saskatchewan. 



178. J. canaliculatus Engelm. in Bot. Gaz. VII. (1882) 6; Buchenau, Monogr. 

 Juncac. (1890) 425. — /. macrophyllus Coville in Univ. Calif. Public. I. (1902) 65. 

 — Pallidus, breviter stolonifer. Folia longa, caulem saepe fere aequantia; auriculae 

 oblongae, angustae. Inflorescentia aperta, anthelata, 8- usque 30-capitata, saepe a 

 bracteä. infima frondosa superata; capitula 3- usque 1 2-flora. Flores ca. 5 mm longi; 

 tepala stramineo-viridia, dorso interdum rubescentia. Antherae lineares, filamentis plus 

 quam duplo longiores, flavescentes*); stilus longus, ovarium aequans. Fructus perigo- 

 nium aequans, trigono-ovatus, angulis rotundatis, breviter rostratus, pallide ferrugineus; 

 semina 0,55 usque 0,60 mm longa, oblique-obovata, apiculata, rectangulariter reticulata, 

 areis transversim lineolatis. 



An Bergwassern in Ober- und Unter- California und Arizona. Hierher die 

 früher als zweifelhaft angesehenen n. 1439 und 137 4 von Parish, California; ferner 

 Hall, Jacinto-Mountain, California. 



179. J. latifolius Buchenau, Monogr. Juncac. (1890) 425. — /. longistylis Torr, 

 var. latifolius (cum?) Engelm. in Transact. St. Louis Acad. (1868) 496 (an pr. pte. 

 forma Junci falcati?)] Watson, Un. St. Geol. Expl. fort. Parallel, Bot. (-1 871) 357; 

 Watson, Bot. Calif. II. (1880) 20 8. — J. orthophyllus Coville in Contrib. Un. St. Nat. 

 Herb. IV. (1893) 207. — Viridis, vel glauco-viridis. Stolones longi, validi. Caules 

 erecti, graciles. Auriculae desunt vel in folio supremo parvae adsunt. Inflorescentia 

 umbelloides vel anthelata; bracteä infima capitulum terminale vix aequans, ceterae 

 hypsophyllinae; capitula ca. 8- usque 1 0-flora. Flores magni, ca. 6 mm longi; tepala 



*) Interdum, pr. ex. in specimine authentico Engelmanni, antherae a fungo endophytico e 

 genere Cladosporio infectae unde purpureo-coloratae sunt. 



