JunCacetB. 
381 
— 
— Mouth of the sheaths not ciliate .... 12 
11. Rad. Is (1 — 2) at least half as long as the stem.—Lime¬ 
stone Alps; U. A. (Rederten; Borenstein, Kamor, Kur- 
firsten, Yal Medels. 1837.) 7 • . Hostii Tausch. 2224. 
— Rad. Is very short.—Alp. 7 . . . trifidus L. 2225. 
12. FIs in an isolated head, or in 2 heads one placed 
above the other, or in several heads forming together 
a many-fld anthela . . . . . 13 
— FIs isolated, in an anthela, in 2236 sometimes in 
clusters of 2 or 3 . . . . . .20 
13. Stas 3. Anthela composed of few heads; heads often 
mixed with or replaced by clusters of Is. Stem 5-25 cm, 
gen. thickened at the base, erect, or (v. uliginosusj 
decumbent and rooting in the mud, or (v. fluitans) elong¬ 
ated and floating in the water. —Peat-swamps, rare; 
Villeneuve, Bale, Stossthal, Hackenegg, Einsiedeln, Geiss- 
boden, Constance. 6 supinus lYlonch. 2226. 
— Stas 6 . . . . . . . . - 11 
14. Heads gen. numerous (in the dwarf forms of 2229 and 
2230 sometimes only 5—3). Ls cylindric or cylindric- 
compressed, divided by transverse partitions and, when 
dried, appearing outside noded-articulate. Sheaths 
without an appendage ...... 13 
— Heads isolated, or 2 — 3 one above the other. Ls with¬ 
out transverse partitions. Sheaths prolonged at each 
end to a scarious appendage .... 18 
15. Divisions of the perianth greenish yellow, obtuse. Cap¬ 
sule 3-celled. Stem with sheaths at the base which are 
not prolonged into Is. Lateral branches of the anthela 
bent back.—Damp meadows, ditches; distrib. 6 
obtusiflorus Ehrh. 2227. 
— Divisions of the perianth brown or blackish (in shaded 
pis sometimes pale). Caps. 1-celled. Sheaths gen. all 
prolonged into ls . .... l(i 
16. Divisions of the perianth all acuminate, the inner longer, 
the point slightly bent outwards. Caps, acuminate- 
mucronate. Heads gen. more numerous than in 2230, 
otherwise varying in size. Stem erect.—Damp meadows; 
distrib. but not common. 5 . sylvaticus Reich. 2228. 
— Divisions of the perianth almost equal in length, the 
inner obtuse or short-mucronate . 17 
17. Branches of the anthela erect-spreading. Divisions of 
the perianth all obtuse, the outer short-mucronate. 
Sheaths of the ls with an acute keel. Stem erect.— 
Damp meadows, sandy shores , up to the Alp., not 
everywhere in the lower regions. 6 alpinus Vill. 2229. 
— Branches of the anthela spreading or divergent. Di¬ 
visions of the perianth all short-mucronate, the outer 
