62 ENGLISH TiOTANY. 



branched. Spikes minute. I -have not seen hypo2:ynous bristles in 

 this ])hint, but few fruiting specimens have passed through my hands. 

 The British plant I have not seen in fruit. 



I am indebted to Mr. T. B. Flower for living specimens of the 

 Devonshire plant. 



Round-headed Club-rush. 



French, Scirpe a tetes rondes. German, Knopfgrasartirje Simse. 



Section VI.— JUNCO-SCIRPUS. 



Spikes several, sessile in a head, or numerous and arranged in a 

 compound or decompound umbellato- corymbose panicle, which is 

 pseudo-lateral from being in the axil of a foliaceous bract resembling 

 a continuation of the stem. Glumes slightly concave. Hypogynous 

 bristles 2 to 6. Nut not crowned with a tubercle ; base of the style 

 not dilated. Stem stout, leafless, the basal sheaths closed, without a 

 network, destitute of a lamina or terminated by a linear-triangular or 

 linear lamina. The barren state of some of the species sometimes has 

 very long linear leaves, like those of Sjiarganium affine. 



SPECIES XI.-SC I R PUS LACUSTRIS. Lirm. 

 Plates MDXCVI. MDXCVn. MDXCVTn. 



Not cajspitose. Rootstock extensively creeping, its branches with 

 the stems placed at short intervals one before the other. Stems 

 numerous, thick, soft, terete or sometimes bluntly trigonous in the 

 upper part, smooth, leafless ; basal sheaths several, pointed, leafless, or 

 the uppermost one with a strapshaped- or linear-triangular channelled 

 lamina : sometimes when growing in running water most of the barren 

 tufts consist of long flat linear translucent submerged leaves. Spikes 

 numerous, ovate-ovoid or oblong-fusiform in fruit, aggregated into 

 stalked heads of from 2 to 5 spikes and solitary, arranged in a com- 

 pound or decompound umbellato-corymbose pseudo-lateral panicle, 

 which afterwards becomes terminal. Bracts very unequal, the lowest 

 one herbaceous, terete, and at first resembling a prolongation of the 

 stem, shorter than the panicle or exceeding it. Glumes oval or oval- 

 obovate, deeply notched, mucronate or subaristate, reddish-brown, 

 sometimes fimbriate-ciliate, smooth or scabrous ; lobes obtuse. Stigmas 

 2 or 3. Hypogynous bristles 4 to (!, shorter than the nut. Nut 

 obovate, muci'onate, bluntly trigonous when there are thi-ee stigmas, 

 or plano-convex when there are only two, nearly smooth, rather dim. 



