ERYNGIUM. LXV1I. UMBELLIFER.E. 285 



4. H. RANUNCULolDEs. Linn. 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. CRANTZIA. Nutt. 



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



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

 globose, the commissure excavat'ed, with 2 vittoe ; carpels unequal, 5- 

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

 ar or flliform, entire leaves. Umbels simple, involucrate. 



C. LINEATA. Nutt. (Hydrocotyle. Michx.} 



Lvs. cuneate-lir-ear, 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 ^-flower- 

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

 red vittae. May Jl. 



3. SANICtJLA. Tourn. 



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



Flowers 9 ^ ; calyx tube echinate, segments acute, leafy ; pe- 

 tals obovate, erect, with a long, inflected point; fruit subglobose, 

 armed with hooked prickles ; carpels without ribs ; vittas nnmerous. 

 ^ Umbel nearly simple. Rays few, with many -flowered, capitate umbel- 

 lets. Involucre of few, often cleft leaflets, involucel of several, entire. 



5. MARILANDICA. Sanicle. 



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

 serrate ; sterile fls. pedicellate, fertile 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 24 / 

 long, J as wide, 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. Tourn. 



Gr. spvyeiv, to belch ; a supposed remedy for flatulence. 



Flowers sessile, collected in dense heads ; calyx lobes somewhat 

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

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

 out vittae or scales. Herbaceous or suffruticose. Fls. blue or white, 

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



1. E. AQ.UATICUM. Button Snake-root. 



Lvs. broadly linear, parallel- veined, ciliate with remote soft spines ; bracts 

 tipped with spines, those of the involucels entire, shorter than the ovate-globose 

 heads. Low grounds on prairies, la. ! 111., &c. A remarkable plant, appearing 

 like one of the Endogense. Very glaucous. Stem simple, 1 5f high. Leaves 

 often 1 2f long, J 1 J' wide. Heads pedunculate, 1' diam. Flowers white, 

 inconspicuous. Jl. Aug. 



2. E. VIRGINIANUM. Lam. (E. aquaticum. MicHx.} 



Lvs. linear-lanceolate, uncinately serrate, tapering to both ends ; invol. of 

 78 linear leaflets, longer than the heads, 3-cleft or spinose-dentate ; scales tri- 

 cuspidate. 7J. Marshes, N. J. to Ohio, Prof. Lock ! and La. Stem hollow, 

 3 4f high, branched above. Leaves 6 10' by 5 10", upper ones much small- 



