296 Fr. Buchenau, 
Juncus 
Descr. Perennis, subcaespitosus. Radices capillares, diam. vix usque 0,2 mm, 
flavidae, capillares. R hizoma brevissimum, indistinctum ; turiones ex axillis foliorum 
inferiorum dense conferti. Caules erecti, usque inflorescentiam plerumque 3 vel 4, 
raro usque 40 cm alti, erecti, diam. 0,5 usque 0,8 mm, etiam superne foliati, teretes, 
laeves, medullá continuä parenchymatosä, serius dehiscente repleti (an denique cavi ?), 
Folia basilaria (in vere formata), frondosa, longissima (usque ca. 60 cm), tenuissima 
(diam, vix 0,3 mm), fluitantia, viridi-straminea, sive rubescentia; vagina usque 4 mm 
longa, angusta, late marginata, superne in auriculas duas oblongas producta; lamina plus 
minus capilliformis, unitubulosa, perfecte septata (serius in aestate folia frondosa erecta, 
diam. 4 usque fere 4,5 mm formantur) ; folia caulina frondosa 4 usque 3, viridia, caulem 
plerumque longe superantia, vagina angusta superne biauriculata; lamina stricte erecta, 
diam, usque 4 mm, laevis, unitubulosa, teres vel subcompressa, septis completis, externe 
manifestis intercepta, superne sensim attenuata, apice acutata, Inflorescentia parva, 
erecta, umbelloides, plerumque e capitulis 2 usque 6 composita, ramis erectis; capitula 
obconica, pauci- (2- usque 5-) flora. Bractea infima frondescens, stricte erecta, inflores- 
centiam aequans vel superans, ceterae hypsophyllinae; bracteae florum ovato-lanceolatae 
mucronato-aristatae, fere toto membranaceae, flore multo breviores. Flores ca. 3,5, 
cum fructu maturo ca. 4,25 mm longi, angusti, virides sive purpurascentes. Tepala 
glumacea, aequilonga (interdum unum alterumve paullo brevius), elongato ovato-lanceo- 
lata, indistincte trinervia, conspicue membranaceo-marginata, obtusiuscula, mucronata 
(sed ob margines acutos saepe acuta. Stamina 3, tepalis ca. 1/3 breviora; filamenta 
linearia, albida; antherae flavidae, oblongae, filamentis ca. dimidio breviores. Pistillum 
paullo exsertum; ovarium triquetrum, elongato-ovatum; stilus brevis; stigmata longa 
erecta, Fructus perigonium conspicue superans, lriquetro-prismaticus, faciebus im- 
pressis, superne sensim attenuatus, sive breviter mucronatus, unilocularis; pericarpium 
tenue, nitidum, superne rubro-ferrugineum, vel ferrugineum, basi pallidius. Semina 
0,75 usque 0,80 mm longa, angusta, lineari-ovata, vitellina, apice et basi fusco-maculata, 
apice brevissime caudata, elongato rectangulariter reticulata, areis manifeste transversim 
lineolatis. 
Distr. geogr. In Tümpeln der Gegend von Mendoeino-City und Hum- 
boldt-County, California, häufig. Vancouvers-Insel (Macoun). 
Collect. Boranper, Calif. Surv., 4767 (!). Kerko und HARFORD, 
Cal., 1041 (D, 1042 (I). 
Nota. Über diese merkwürdige Pflanze : sagl BoLANDER in einem Briefe an Dr, ENGEL- 
MANN (I. c. p. 461) Folgendes: »In spring these ponds are completely covered with the 
pale green capillary leaves of this species, 1—2 feel long. As the water recedes with the 
advancing dry season, the erect flowering stems begin to form, and a little later the 
vestiges of the decayed vernal leaves cover the remaining mud with grayish spiderweh- 
like filaments.« Ganz Ahnliches — wenn auch nicht in dieser Auszeichnung — kann man 
in Europa bei Juncus supinus an austrocknenden Tümpeln beobachten. Die Pflanze steht 
überhaupt dem J. supinus sehr nahe, unterscheidet sich aber von ihm durch die ein- 
róhrigen Laubblätter und den Bau der Blütenteile, 
67. J. heterophyllus Leox Durour, Observations sur quelques plantes 
de la France, in: Ann. des se. natur., 1825 V, p. 88. Submersus. Caules 
pro maxima parte submersi, repentes vel fluitantes, e nodiis radicantes, 
internodiis elongatis ; internodia suprema erecta, emersa. Folia submersa 
(hiemalia) filiformi-setacea, tenera, emersa crassa, rigida (diam. usque 
6 mm), cauli subaequilonga, teretia, unitubulosa, septis completis valde 
manifestis intercepta. Inflorescentia erecta, ramis elongatis, e capitulis 6 
