3«)6 \(irf/t Anif'indfi Ci/pcn/rrie. 
Sciiipus culiiio ;ii)cipii(), \'v. (han.! jl. virg. y. lU. 
Culms cespitD^c, 6 — 12 inchos liigli, offc-ii .siircLiding or procinnhfnt, 
much coiuint's^cd, scabrous on the cd^jcs. Lrdvca Hat, very acute, 
nearly a line in Im adili. slioricr iliaii the cuhn, smooth ; shcalhs slightly 
bearded at the throat. Umhci mostly ilecoinponnd ; tlio rays about an 
inch lonir, comjjresscd; secondary ra\s l)earin2; 1 — 3 pedunculate spikes 
witii a sessile one in the fork. Involiicn: fnliaceous, one of the leaves 
generally lon2;crtliaii ilie unih'd, the other shorter. Sj)ikr:s il line long. 
.S''7r/<\v ferruginous, ])ri>inineuil_\' keeled, v/ifh the luucronale ])oint some- 
wliat sprcadinc- Siaiiieiis2. Sti/k e(|ually 3-cleft. A^/// mimile. convex 
on the sides, jreuerally covered with depressed cajntate warts, especially 
towards the base and summit. 
?Iab. lioir- and low i;j-oiiiids, [):irti;'nlar!y aloiig rivers; 
rar.'i\' in drv situations; MassacIiusetU to ]''iorida. .Near Boston, 
Ji'ij:(:l(iir; near the city oiXe\v\ork, and in iNew .Terse}!; 
District of Coliinil.ia, Dr. Bahhiin ! ; Iventucky, Ih: Shor/ .' ; 
near St. Louis, Missouri, T. DraininoiuU : Ainuania, ///•. 
ihilcs ! 
C)i)s. Nearly allied to T. roiiijilisnalu^ ,^. oh Esc/ih. hi 
TV'm:h!^s roiilri/j. [). lO^i (Scirp- coiU!)lanatus, J'aJt/,) hut. t])at 
species is a uiuch lari^er plant, the culm is far more ancipital, 
the scales broader and not raucronate, and the nut trique- 
trous. In my specimens from New Jersey, the nut is covei-ed 
with singular, somewhat stipitate tnbcicles, ha\ in^i' a depression 
at the top. T!ie\' are less conspicuous, (i)eing chiefly situated 
jiear the inise ol the nut) in a dwarf autumnal form of the plaiit 
found In' Di'- Baldwin in Use district of C'olumhia. ui some 
fine s[)ecimtms colieciod in Ala].>ama by Dr. (^ales, they are 
veiy distinct, while in a \ailety for which i am inih-bted to ])r. 
iShorl, the nuts are neai-ly smooth. 'J'lie plant hci-e described 
is now resiaided as a distiiu't species from 7'. a iil iiiinidhx (^^c. 
autumnalis, il')lth.), as W'ill.'.cnow h)n^- since suspected it to 
he, and as Michanx coji -idered it: I have there foic a.(lopt(;d 
the speciiic name of the latter bolanist, in |)reference to diat of 
Is. h1) Ksenbcck. 
