DESCRIPTION OF A NEW SINGHALESE SEDGE. 235 
multiplied ; and a thorough revision of the tribe on broad and sound 
principles, like those followed in the « Genera Plantarum,' must in- 
evitably lead to extensive reductions : Calamagrostis, for example, is 
absolutely distinguishable from JgrottU by nothing except the length 
of the hairs embracing the floret ; and great discordance exists amongst 
botanists as to the limits between those genera, Lachnajrostis (when 
admitted), and even Gastridium. 
natis : 
DESCRIPTION OF A NEW SINGHALESE SEDGE. 
By H. F. Hance, Ph.D., etc. 
Carex Thwaitesii, n. sp. ; radicibus fibrosis ; culmis 1^-2-pedalibus 
per totam longitudinem foliosis compressis cum vaginis hirto-scabridis ; 
folus linearibus exquisite attenuatis 7-9 poll, longis 2£ lin. latis sca- 
ns, mfenoribus deorsum in vaginas subscariosas sensim diminutis, 
supremis culmum paulo superantibus ; iigulis conspicuis scariosis ob- 
"Mgia productis lateribus sursum protractis et foliorum basi libera; ad- 
spicis 3-5, terminali mascula cylindrica semipollicari, squamis 
palhde brunneis ovatis acutis muticis, reliquis femineis f-l-pollicaribus, 
omnibus breviter pedunculatis ; bracteis foliis conformibus culmo 
figioribus ; perigyniis elliptico-trigonis fuscis densissime cinerco- 
> r o-tomentosis in rostrum conspicuum iis tertio breviorem ore bicus- 
puato productis, squama pallide brunnea ovata breviter cuspidata 
ouplo lougioribus ; achamio elliptico-triquetro 1| lin. longo pallide 
nuineo nitido oculo armato subtilissime puncticulato basi stylina baud 
coronato. 
In ditionibus Maturatta et Hewahette dictis ins. Zeylanise, alt. 
4-5000 ped. (Thwaites !, n. 2750).— C. breviculmis, Thw.' Enum. PI. 
^vlaniae, p. 356, non R. Br. 
uen naming the above Sedge C. breviculmis, Dr. Thwaites had 
S6en no specimens of the Australian plant, from which it is surely 
»ore distinct than that and C. Royleana, N. ab E., inter se. The to- 
y ti:flernnt aspect, robuster habit, leafy stem, larger and thicker 
-P 1 es, different-coloured squamae, and larger, fuscous, densely hairy, 
011 ^-beaked perigynia, seem to me abundant and indubitable marks of 
a 'stinction. 
