Monographia Juncacearum. 299 
Juncus 
ENGELMANN usque 25-) flora. Bracteae omnes hypsophyllinae, stramineae sive pallide 
ferrugineae; bracteae florum ovatae, aristato-acuminatae, fere toto hyalinae, flore multo 
breviores. Flores ca. 3 mm longi, acutanguli, viridiusculi sive ferruginei. Tepala 
glumacea, aequilonga, vel externa subbreviora, viridi-straminea sive ferruginea, anguste- 
lanceolata, acuminata, vel fere aristata, trinervia, anguste membranaceo - marginata. 
Stamina 6, tepala dimidia paullo superantia; filamenta e basi triangulari-linearia, 
albida; antherae flavidae, lineares, filamentis longiores, interdum deciduae. Pistillum 
exsertum; ovarium triquetro-ovatum, sensim in stilum longum ovarium aequantem an- 
gustatum; stigmata longa, erecta. Fructus perigonium aequans vel paullo superans, 
triquetro-ovatus, rostratus, unilocularis, nitidus, stramineus sive ferrugineus. Semina 
0,5 mm longa, sphaerico-obovata, obtusissima, apiculata, castanea, anguste costata, 
rectangulariter reticulata, areis subtissime trausversim lineolatis. 
Distr. geogr. In Flüssen und stehenden Gewässern der nordöst- 
lichen Vereinigten Staaten von Maryland bis Maine; Neuschottland, Neu- 
braunschweig (Macoun). 
Collect. Engerman, hb. norm., 53 (V. 
Nota. J.militaris ist eine überaus merkwürdige und mit keiner anderen Art näher 
verwandte Pflanze; der krüftige Wuchs, das sehr lange starre, bajonnetartig vorge- 
streckte stengelständige Laubblatt machen die Pflanze sogleich kenntlich; zwischen dem 
Laubblatte und dem Blütenstande findet sich zuweilen ein steriles Hochblatt, welches 
nur selten eine kurze Laubspitze trägt. — Überaus merkwürdig sind aber namentlich die 
grundständigen flutenden Laubblätter, welche bis jetzt nur in rasch fließenden Ge- 
wässern beobachtet worden sind. Dr. Bonge sagt darüber bei ENGELMANN l. c. p. 464 
Folgendes: »It seems that about the period of maturing the seeds, at the End of August, 
the long horizontal rhizoma, which at its end is to bear the flowering stem of next season, 
begins to shot forth, and from the axils of its scales produces a number of extremely 
short or rudimentary branchlets which are again branching and form short knobs on the 
rootstock, These branchlets bear a number of capillary leaves of the thickness of horse- 
hair, and knotted like the ordinary leaves of this species, at this time, end of August, few 
in number and only a few inches long. Towards the close of the season they increase in 
number and length, and seem to live through the winter wherever they are immersed 
deep enough to escape the frost. They attain their full development about May and June, 
when they are 2—3 feet long and carpet the bottom of those streams, at the depth of 
2— 4 feet below the surface, with their dark green undulating masses, most beautiful to 
look at, but quite obnoxious to the proprietors of the millstreams, the sluices of which 
they are apt to obstruct. These leaves decay about the period the plant begins to bloom.« 
Wie die Pflanze sich in dieser Beziehung in stehenden Gewässern verhält, bleibt noch zu 
ermitteln. Wahrscheinlich bildetsie hier eine dritte Form (dünncylindrischer) Laubblätter. 
$ 30. 
(v. p. 262.) 
Plantae perennes !), plerumque altiores. Caules et folia valde, plerum- 
que ancipiti-compressa; caules saepe anguste sed distincte alati. Auriculae 
plerumque desunt, rarius parvae adsunt. Lamina septis incompletis, externe 
vix vel paullo manifestis intercepta, pluritubulosa °). 
A. Stilus longus. 
A. Ovarium sensim in stilum attenuatum. 
1) Specimina J. prismatocarpi var. Leschenaultii interdum in primo aestate florent. 
2) Exceptio: Forma unitubulosa J. prismalocarpi var. Leschenaultii. 
