350 Fr. Buchenau. 
Juncus 
gonium superans, triquetro-prismaticus, longius breviusve rostra- 
tus. California, Oregon . . . . . . . . . 98. J. dubius Engelm. 
2. Tepala latiora, latius membranaceo marginata, aequilonga. 
à. Ovarium sensim in stilum attenuatum. Stigmata longissima. 
Flores fusci. Mexico. . . . . . . . . 99. J. trinervis Liebm. 
b. Ovarium abrupte in stilum attenuatum; stilus ovarium aequans 
vel eo longior. 
a. Floresintense colorati. Ovarium trigono-ovatum. Californien, 
Oregon. . . . . . . . . . . 100. J. nevadensis Watson. 
B. Flores pallidi. Ovarium breve, fere trigono- sphaericum. 
Californien, Nevada. . . . 401. J. chlorocephalus Engelm. 
98. J. dubius G. ExcrrwaNN, Rev., in: Transact. St. Louis Acad., 1868, 
IH, p. 459. Rhizoma horizontale, crassius (usque 3,5 mm). Caules erecti, 
plus minus compressi, 30 usque 75cm alti. Lamina teres, laevis, unitubu- 
losa, septis completis externe manifestis intercepta. Inflorescentia suprade- 
composita (raro decomposita), anthelata, ramis elongatis; capitula hemi- 
sphaerica, 6- usque 10-flora, straminea vel ferruginea. Flores ca. 3, eum 
fructu maturo 4 mm longi. Tepala aequilonga, lanceolata, subulata (inter- 
dum interna latius marginata, obtusiuseula, mucronata). Stilus longus, 
ovarium aequans. Fructus perigonium superans, triquetro - prismaticus, 
brevius longiusve rostratus, nitidus, ferrugineus sive stramineus. 
Litt. S. Warsow, Bot. of California, 1880, II, p. 209. 
Descr. Perennis, laxe caespitosus. Radices filiformes, diam. usque 4 mm, 
pallidae, sparse fibrosae. Rhizoma horizontale, longum, perdurans, diam. usque 
3,5 mm, Caules erecti, plerumque approximati, usque inflorescentiam 30 usque 75 em 
alti, etiam superne foliati, plus minus compressi, laeves, medullá continuá parenchyma- 
toså repleti, denique cavi. Folia basilaria infima cataphyllina, usque 8 cm longa, inter- 
dum rubescentia, plus minus mucronata, supremum eorum et caulina (2—85) frondosa, 
caule breviora; vagina usque 7 cm longa, late marginata, superne laxiuscula et in auri- 
culas duas magnas producta; lamina teres vel subcompressa, laevis, unitubulosa, septis 
perfectis externe manifestis intercepta, superne sensim angustata, apice acutata. In- 
florescentia erecta, magna, supradecomposita (rarius decomposita), ramis elongatis, 
primanis plerumque erectis, superioribus saepe patulis; capitula numerosa, discreta, 
hemisphaerica, pluri- (6- usque 40-) flora, straminea vel ferruginea. Bractea infima 
frondescens, inflorescentiä multo brevior, ceterae hypsophyllinae, stramineae vel rubes- 
centes; bracteae florum lanceolatae , acuminatae, fere toto hypsophyllinae, pallidae, flore 
multo breviores. Flores ca. 3, cum fructu maturo 4 mm longi, straminei, sive rubes- 
centes. Tepala glumacea, aequilonga, lanceolata, subulata, indistincte nervia, strami- 
nea sive dorso rubescentia, interna latius marginata (et interdum obtusiuscula, mucro- 
nata). Stamina 6, tepalis 1/3 usque !/ breviora; filamenta triangulari-linearia; antherae 
lineares, filamentis longiores. Pistillum longe exsertum; ovarium e basi ovata conico- 
elongatum, sensim in stilum aequilongum attenuatum ; stigmata longissima, erecta. Fruc- 
tus perigonium superans, triquetro-prismaticus, lateribus planis vel impressis, brevius 
longiusve rostratus, unilocularis; pericarpium tenue, nitidum, ferrugineum sive strami- 
neum, Semina 0,35 usque 0,4 mm longa, obovata, apiculata, pallide ferruginea, rectan- 
gulariter reticulata, areis transversim lineolatis. 
Distr. geogr. Auf feuchtem Sande und an Ufern große Rasen 
