cyrERACE^. 65 



Spikelcts oblong-ovoid iii fruit. Glumes smooth, or slightly rough 

 with scattered asperities. Anthers with the apiculus not ciliated. 

 Stigmas 2. Nut plano-convex. 



On the muddy banks of tidal rivers. Very local. Plentiful on the 

 banks of the Thames, on both sides of the river from Kew to Wands- 

 worth, and formerly on tlie Kentish shore below Greenwich, but the 

 station is now destroyed there by the improvement of the river banks; 

 on the banks of the Arun neiu- Amberley, Sussex. It has been 

 reported from other places, but probably erroneously. It certainly 

 does not now grow at Ham Ponds or other places. Sandwich,' nor in 

 East Wear Bay, in South Kent, where it was said to occur, by tlie 

 Rev. G. E. Smith, in the "Flora of South Kent." 



England. Perennial. Summer, Autumn. 



The stem varies from li to 6 feet high or more, and is more or 

 less evidently 3-sided towai'ds the apex. Very similar to the two 

 preceding sub species, differing from S. eu-lacustris only in the stem 

 being more or less trigonous above; the anther-point not fringed, the 

 stigmas 2; and the nut plano-convex. From S. Tabernttunontanaj 

 it differs in the stem not being glaucous nor terete to the summit, and 

 tlie glumes not scabrous or but slightly so; from both by tlie longer 

 and more cylindrical spikelcts. 



Tngonous-stemmed Bidlvush. 



French, Scirpe carenc. German, BuvaVs Simse. 



SPECIES XII— SCIRPUS TRIQUETER. Linn. 



Plate MDXCIX. 



Reich. Ic. Fl. Germ, et Helv. Vol. VIII. Tab. CCGV. 

 Billot, Fl. Gall, et Germ. Exsicc. No. 1083. 

 S. Pollicbii, Gren. & Godr. Fl. de Fr. Vol. III. p. 374. 

 (H)Eleogiton triquetrum, Reich. Fl. Germ. Escurs. p. 77. 



Not casspitose. Rootstock extensively creeping, its branches with 

 the stems placed at intervals one before the other. Stems several, 

 thick, soft, triquetrous throughout, leafless; basal sheaths several, 

 pointed; the lowest ones leafless, the uppermost one with a strap- 

 shaped- or linear-triangular triquetrous channelled lamina; the barren 

 tufts never producing long floating leaves. Spikes several or few^ ovate- 

 ovoid in fruit, aggregated into stalked heads of from 2 to 5 spikes, 

 and solitary, aiTanged in a simple umbellato-corymbose pseudo-lateral 

 jianicle, or sometimes the spikes all sessile, from 3 to 8 in a psciudo- 

 lateral head : in either case the inflorescence does not become terminal 

 in fruit. Bracts very unequal, the lowest one herbaceous, tricpietrous, 



VOL. X. K 



