Monographia Juncacearum. 273 
Juncus 
internodiis distinetis. Caules graciles, 6 usque 30 em alti, subcompressi vel 
compressi. Auriculae adsunt. Lamina paullo compressa, unitubulosa, septis 
perfectis, externe non manifestis, intercepta. Inflorescentia pseudosimplex, 
capituliformis, diam. 10 usque 12 mm, 10- usque 25-flora. Flores 3,2 usque 
4 mm longi, castanei. Tepala aequilonga, vel interna sublongiora. Sta- 
mina 6, rarius 3; antherae filamentis subbreviores. Stilus cylindricus, 
ovario brevior. Fructus perigonium vix aequans, obtusus, breviter muero- 
natus, unilocularis, apice castaneus. Semina 0,5 usque 0,6 mm longa, apice 
distinete albo-apiculata, basi stipitata, obovata, reticulata. 
Litt. J.ensifolius Wikstr. var. ß minor E. Meyer, Juncaceae a Chamisso 
coll., in: Linnaea, 1828, IIl, p. 373. C. S. Konta, Enum., plantarum, 484 
HI, p. 361 (sub speciebus inquirendis). E.Mever, in C. L. a Leperour, flora 
rossica, 1853, IV, p. 228 (sub Junco falcato E. M.!). G. EnGenmann, Rev. N. 
Amer. Speeies Genus Juncus, in: Transact. St. Louis Acad., 1868, II, p. 479. 
G. ExcELMANN, in: Un. Stat. Geolog. Surveys west of the hundredth meri- 
dian, 1879, VI, p. 273. S. Warson in: Un. Stat. Geolog. Explor. of the 
fortieth parallel, 1871, p. 358. S. Warsow, botany of California, 1880, II, 
p. 210. J. M. CourrEn, Man. of bot. of Rocky Mountain Region, 1885, p. 358. 
Descr. Perennis, laxe caspilosus. Radices capillares vel filiformes, diam. usque 
0,5 mm, pallidae, fibrosae. Rhizoma horizontale gracile, internodiis distinctis vel elon- 
gatis, diam. ca. 1,5 mm. Caules erecti, graciles, tenues, 6 usque 25, raro 30 cm alti, etiam 
superne foliati, subcompressi vel compressi, diam. 4 usque 4,5 mm, medullä continuä 
parenchymatosä repleti, serius cavi. Folia basilaria infima cataphyllina, usque 4 cm 
longa, supremum eorum et caulina (2 usque 3) frondosa, caule breviora; vagina angusta, 
superne in auriculas duas obtusas producta ; lamina subteres vel paullo compressa, uni- 
tubulosa, septis tenuissimis sed perfectis, externe raro manifestis intercepta, diam. ca. 4 
mm, superne sensim attenuata, apice subulata. Inflorescentia terminalis, saepissime 
pseudo-simplex, capitulum (compositum) fere sphaericum multi- (10- usque 25-) florum, 
diam. 40 usque 12 mm ; raro capitulum laterale stipitatum, Bractea infima saepe fron- 
descens, capitulum terminale superans (interdum hypsophyllina); bracteae florum lanceo- 
latae vel elongato-lanceolatae, pallide castaneae, flore breviores. Flores distincte, inter- 
dum conspicue pedunculati, castanei vel fere nigri, 3,2 usque fere 4 mm longi. Tepala 
glumacea, aequilonga vel interna subbreviora, lanceolata, uninervia, acuta (interna distincte 
membranaceo-marginata, interdum subobtusa). Stamina plerumque 6, rarius 3 tantum, 
tepalis ca. 1/3 breviora; filamenta linearia, albida; antherae lineares, flavidae, filamentis 
breviores (interdum stamina interna breviora!). Pistillum exsertum; ovarium trigono- 
obovatum vel trigono-obpyramidatum; stilus cylindricus, ovario brevior; stigmata longa, 
erecta. Fructus perigonium vix aequans, triqueter vel trigonus, obovatus vel fere ob- 
conicus, obtusus, breviter mucronatus, lateribus planis vel vix impressis, unilocularis, 
nitidus, apice castaneus, basi pallidior. Semina 0,5 usque 0,6 mm longa, apice distincte 
albo-apiculata, basi saepe longius stipitata, obovata vel oblique obovata, ferruginea, 
rectangulariter reticulata, areis arctis vel latioribus, laevibus. 
Distr. geogr. Auf feuchten Stellen und Wiesen, an Gewässern der 
Gebirge des Nordwestens von Amerika, von den Rocky-Mountains an bis 
Californien, Oregon, Siteha und Unalaschka. 
Collect. ExcgLMANN, hb. norm., 92 (!). BorawpER et Krrroca, Cal. 
Surv., 6039 (t. Jones, Utah, 4094 (!). Harı et Hannovn, Rocky Mount., 
565 D. v. sub J. ciphioide, var. montano). Marr, Oregon, 549. 
Botanische Jahrbücher. XII. Bd. 18 
