Cyperaceae. 
387 
10. Stem triangular throughout its entire length. (Stigs 2) 11 
— Stem entirely cylindric, rarely obtuse angled above 12 
11. Ls of the rad. sheaths short. Spikelets partly sessile, 
partly peduncled. FI.-scales with obtuse lobes. Stem 
50 —60 cm. S. triqueter auct. not L., S. Pollichii Gr. 
Godr.—Marshes, shores, rare; W. Y. B. Z. 6 
trigonus Roth. 2271. 
— Ls of the rad. sheaths elongated (10 — 15 cm long). Spike- 
lets all sessile. FI.-scales with acute lobes. Stem slenderer 
than in the last. Invol.-bract longer. S. Rothii Hopp,— 
Water-side; shores of the lakes of Neuchatel and Bienne. 6 
pungens Vahl. 2272. 
12. Stem 50 —100 cm, light green, obtusely 3-cornered above, 
with 2 rather convex faces, the 3rd flat. Fi.-scales smooth 
or with scattered, raised spots. Top of the anthers 
glabr. Stigs 2. S. Duvalii Hopp., S. lacustris-trigonus or 
Tabernsemontanus-trigonus (see N. Beitr. 1, 48).—In¬ 
undated places, very rare; Bouveret, Aarau, Brunnen? 
Rheineck. 6, 7 . . . . *carinatus Sm. 2273. 
— Stem entirely cylindric ...... 13 
13. Stem (100 —200 cm) bright green. FI.-scales smooth. Stigs 
gen. 3. Top of the anthers bearded. Achenes 3-cornered. 
—b .bodamicus Gaud. (Custoris Heg.). Stem lower, ob¬ 
tusely 3-cornered in the upper part; rad. sheaths pro¬ 
longed into ls—Shores, in water; everywhere. 6 
lacustris L. 2274. 
— Stem glaucous, lower and slenderer than in the last. 
Fl.-scales rough-spotted. Stigs 2. Top of the anthers 
glabr. Achenes compressed - convex, smaller. Anthela 
denser. —Inundated places; rarer than the last, but dis- 
trib. 6 Tabernaemontani Gmel. 2275. 
14. (9). Stem triangular (50—70 cm). Bristles of the perianth 
present. Spikelets sessile Bract of the anthela very long, 
spreading. Achenes wrinkled transversely!—Marshes, 
rare; Locarno, Yilleneuve, Noville, Fehraltorf and Gossau, 
Canton Zurich, Frauenthal, Canton Zug, Rheineck. 7 
mucronatus L. 227(5. 
— Stem cylindric (5— 25 cm). Bristles of the perianth 0 13 
15. Spikelets clustered (2—4 together) not far from the top 
of the stem. Achenes with longitudinal ribs. —Damp 
places, ditches; not common (wanting in S. and W.?). 7 
setaceus L. 2277. 
— Spikelets in clusters (of 3—5) near the middle of the 
stem. Achenes transversely wrinkled. —Damp places on 
the shores of the lake of Geneva. 7 supinus L. 2278. 
