Erynoium. LXVII. UMBELLIFER^. 285 



4. H. RANUNCULoiDEs. Linii. f. (H. cymbularifolia. Muhl.) 

 Glabrous ; Ivs. roundish-reniform, 3 — 5-lobed, crenate ; petioles much longer 



than the peduncles ; umbels 5 — 10-flowered, capitate ; fr. roundish, smooth. — In 

 water, Penn. to Ga. Stems weak, 1 — 2f long. Leaves 1 — 2' diam., the middle 

 lobe smaller than the others. Petioles 2 — 3' long. Peduncle about 1' long. Jl. Aug. 



2. C RANT Z I A. Nutt. 



In honor of Prof. Crantz, author of a monograph on the Umbelliferae. 



Calyx tube subglobose, margin obsolete ; petals obtuse ; fruit sub- 

 globose, the commissure excavated, with 2 vittce ; carpels unequal, 5- 

 ribbed, with a vitta in each interval. — Small, creeping herbs with line- 

 ar or filiform, entire leaves. Umbels simple^ involucrate. 



C. LiNEATA. Nutt. (Hydrocotyle, Mickx.) 



Jbi)S. cuneate-linear, sessile, obtuse at apex, and with transverse veins, 

 shorter than the peduncles. — Muddy banks of rivers, Mass. ! to La. Stems sev- 

 eral inches long, creeping and rooting in the mud. Leaves 1 — 2' by 1 — 2", 

 often linear and appearing like petioles without laminae. Umbels 4 — 8-flower- 

 ed. Peduncles i longer than the leaves. Involucre 4 — 6-leaved. Fruit with 

 red vittae. May — Jl. 



3. SANICtJ-LA. Tourn. 



Lat. sanare, to cure ; on account of the reputed virtues as a vulnerary. 



Flowers <^ ^ ^ ] calyx tube echinate, segments acute, leafy ; pe- 

 tals obovate, erect, with a long, inflected point; fruit subgloi)ose, 

 armed with hooked prickles ; carpels without ribs ; vittae numerous. — 

 % Umbel nearly sim2)lc. Raysfew^ with many-fiowered^ capitate umbel- 

 lets. Involucre offeiv, often cleft leaflets^ iiivolucel of several^ entire. 



5. Marilandica, Sanicle. 



Lvs. 5-parted, digitate, mostly radical ; Ifts. or segments, oblong, incisely 

 serrate; sterile fls. pedicellate, /t?-///^ sessile; calyx segments entire. — In low 

 woods, thickets, U. S., and Can., common. Stem 1 — 2f high, dichotomously 

 branched above, smooth, furrowed. Radical leaves on petioles 6 — 12' long, 3- 

 parted to the base, with the lateral segments deeply 2-parted. Segments 2 — i' 

 long, i^ as Avide, irregularly and mucronately toothed. Cauline leaves few, 

 nearly sessile. Involucres" 6-leaved, serrate. Umbels often proliferous. Um- 

 bellets capitate. Flowers mostly barren, white, sometimes yellowish. Fruit 

 densely clothed with hooked bristles. Jn. 



4. ERYNGIUM. Toum. 



Gr. epvyeiVf to belch; a supposed remedy for flatulence. 



Flowers sessile, collected in dense heads ; calyx lobes somewhat 

 leafy ; petals connivcnt, oblong, emarginate with a long inflexed 

 point ; styles filiform ; fruit scaly or tuberculate, obovate, terete, with- 

 out vittae or scales. — Ilcrhaccous or sujfruticose. Fls. blue or white, 

 bracteate ; lower bracts involucrate^ the others smaller and paleaceous. 



1. E. AauATicuM. Button Snake-root. 



Lvs. broadly linear, parallel-veined, ciliate with remote soft spines; l^ra/:ts 

 tipped with spines, tho.sc of the involucels entire, shorter than the ovate-globose 

 heads.— Low grounds on prairies, la. ! III., &c. A remarkable plant, appearing 

 like one of the Endogenrp. Very glaucous. Stem simple, l—5f high. Leaves 

 often 1— 2flong, i— li'widc. Heads pedunculate, J— 1' diam. Flowers white, 

 inconspicuous. Jl. Auy. 



2. E. ViRGiNiANUM. Lam. (E. aquaticum. Michz.) 



Lvs. linear-lanceolate, imcinaioly serrate, tapering to both ends; invnl. of 

 7_8 line^ir leaflets, longer than the heads, 3-cleft or spinose-dentate ; scahs tri- 

 ouspidate.— 7|. Marshes, N. J. to Ohio, Prof. Luck ! 2indL.A. Stem hollow, 

 3— If hiirh. branched al)ove. Leav(-< fi— 10' bv 5—10", upper ones much .•»mall- 



