Cyperaceae. 
385 
— Heads composed of 2—3 dark rusty brown spikelets. 
Ls not reaching the middle of the stem. Stems 15—30 cm. 
—As the last. 5 ferrugi'neus L. 2254. 
601. Cladium. Cladium. Ill, 76. IT, 13. 
1. Ls denticulate and cutting at the edges and on the 
keel. Stem 80—100cm.—Marshes; not common (wanting 
in G. U. A.). 7 Mariscus R. Br. 2255. 
602. Rhynchospora. Breaksedge. Ill, 76. 
1. Spikelets brown. Bristles of the perianth rough, the hairs di¬ 
rected forwards. Rt-stock creeping.— Marshes, rare ;T.Z.A. 
Ascona, Mt. Cenere; Hurden; Rheineck, Schloss Forst- 
egg). 6 ..... fusca R. Sch. 2256. 
— Spikelets white (later rather reddish). Bristles of the 
perianth rough, the hairs directed backwards. Rt-stock tuf¬ 
ted.—Marshes; here and there. 6 . alba Vahl, 2257. 
603. Heleocharis. Heleocharis. Ill, 78. 
1. Stems quadrangular-furrowed, very slender, almost ca¬ 
pillary (3 —10 cm). Stigs 3. Achenes with longitudinal 
rib s. — Inundated places, not common. 6 
acicularis R. Br. 2258. 
— Stem cylindric or slightly compressed (sometimes, es¬ 
pecially when dry, slightly streaked). Stigs 2. Achenes 
without ribs ........ 2 
2. Perenn. pis (with almost ligneous, creeping, rt-stock). 
Floral scales subacute (except those at the base of the 
spikelet) ......... 3 
— Ann. (many-stemmed) pis. FI. scales obtuse . 4 
3. The 2 v lower (empty) scales only half-clasping the base 
of the spikelet. Stems rather dull (15—60 cm).—Damp 
meadows, water-side; everywhere. 5 palustris R. Br. 2259. 
— The lower scale entirely clasping the base of the 
spikelet. Stems shining, slenderer than in the last, easily 
turning yellow in drying.— Peat-mosses; distrib. but 
less common than the last. 6 uniglumis Schult, 2260. 
4. Spikelets many-fld. Achenes yellowish, shorter than the 
bristles of the perianth. Stems 10—15 cm. — Inundated 
places, very rare; Cugnasco ; Geneva; Reuchatel (between 
Locle and the Col des Roches, if yet?), Pruntrut. 6 
ovata R. Br. 2261. 
— Spikelets few-fld. Achenes black, longer than the bristles 
of the perianth. Stems 3 — 5 cm. H. atro-purpurea Kuntli? 
— On the damp sand by the lake of Geneva; only be¬ 
tween St. Sulpice and les Pierrettes, not far from Lau¬ 
sanne. 7. Lereschii Thom. 2262. 
