202 Fr. Buchenau, 
Juncus 
stricta, basi tantum canaliculata, laevis, in statu sicco valleculata, subulata, caulibus 
breviora (ca. 20—40 cm longa, diam. 0,5—4 mm), medullä parenchymatosá farcta. In- 
florescentia terminalis erecta, composita, anthelata, 2—4 cm longa; rami drepani- 
formes, flores secundi, distincte distantes, non imbricati. Bractea infima frondescens, 
inflorescentiä brevior, rarius eam superans, ceterae hypsophyllinae; prophylla floris 
ovato-lanceolata, obtusiuscula, hypsophyllina, membranaceo-marginata, flore pluries 
breviora. Flores 3, cum fructu maturo 4 mm longi, straminei, vel ferrugineo-straminei. 
Tepala aequilonga, lanceolata, acuta, medio tantum chartacea, lateribus latis membra- 
naceis. Stamina 6, tepalis !/4 breviora; filamenta linearia; antherae lineares, flavi- 
dae. filamenta aequantia. Pistillum tepala aequans; ovarium ovato-cylindricum ; 
stilus brevissimus; stigmata magna. Fructus tepala fere dimidio superans, ovato- 
cylindricus, obtusissimus, breviter mucronatus, apice fere tricoccus, trilocularis; peri- 
carpium cartilagineum firmum, stramineum, subnitidum. Semina numerosa, longa 
(4 mm longa et ultra), angusta, basi et apice longe albo-caudata, nucleo cylindrico, pallide 
ferrugineo, basi et apice fusco, regulariter longitudinaliter reticulata, 
Distr. geogr. Nordamerika, von Illinois westwärts bis Colorado und 
in die Rocky Mountains; Saskatchawan (BoursEat). 
Collect. ExceLmann, hb. norm., 47 (!). Drummoxv, Rocky Mountains, 
298 (!). Macoun, canad., 1584 (!). 
Nota. J. Vaseyi und Greenei sehen äußerlich manchen Formen des J. tenuis und 
dichotomus ziemlich ähnlich, unterscheiden sich aber durch die Form der Frucht und die 
geschwünzten Samen leicht von ihnen, . 
17. J. Greenei Oaxrs et TUcKERMANN, in J. Torrey, Flora of the state of 
New-York, 1843, II, p. 330 et in Sırıman, Amer. Jour., 1843, XLV, p. 37. 
Caules scapiformes, stricti, 30—75 em alti, lamina supra profunde canali- 
eulata; fructus perigonium superans, ovato-conicus, obtusatus, muerona- 
tus, lateribus convexis; semina parva, obovata, apice et basi breviter albo- 
*audata. 
Litt. G. ExcErLMANN, Revision of the N. Amer. Species of the genus 
Juncus. in: Transact. Acad. St. Louis, 1866, II, p. 449 et 1868, II, p. 492. 
Descr. Perennis, dense caespitosus. Radices filiformes, diam. 0,25—0,5 mm, 
pallide fuscae, fibrosae. Rhizoma horizontale, internodiis brevissimis. Caules erecti, 
stricti, teretes, scapiformes, laeves, in statu sicco costati, 30—75 cm alti, diam. 1,5—2 mm, 
medullä parenchymatosá repleti, serius cavi. Folia basilaria infima cataphyllina, vagini- 
formia, usque 6 cm longa, duo frondosa; vagina biauriculata, lamina caule brevior, 
stricta, teres, supra profunde canaliculata, subulata, medullá parenchymatosá repleta. 
Inflorescentia terminalis, erecta, composita, anthelata, 4—5 cm longa; rami dre- 
paniformes, flores secundi plus minus approximati. Bractea infima frondosa, ple- 
rumque inflorescentiam superans (interdum pluries longior), ceterae hypsophyllinae ; 
prophylla floris parva, ovata, acuta, flore multo breviora, Flores 4, cum fructu maturo 
fere 5 mm longi, straminei vel fusco-straminei (rarius externe rubescentes. Tepala 
subaequalia interna distincte breviora, externa lanceolata, subulata, anguste membra- 
naceo- marginata, interna late lanceolata, late membranaceo-marginata, acuta, vel obtu- 
siuscula. Stamina 6, tepalis externis ca. ?/; breviora, filamenta linearia (staminum in- 
ternorum brevia!); antherae lineares, flavidae, filamenta externa aequantes. Pistillum 
perigonium vix aequans; ovarium ovato-cylindricum; stilus brevissimus; stigmata 
magna. Fructus perigonium superans, ovato-conicus, obtusatus, mucronatus, lateri- 
bus convexis, apice non impressis, trilocularis; pericarpium cartilagineum, firmum 
fusco-stramineum, nitidum. Semina parva, ca. 0,5 mm longa, oblique-obovata, fere 
