Erynoium. LXVIl. UMBELLIFElliE. 285 



4. H. RANUNCULoiDEs. Linn. J'. (H. cymbularifolia. Muhl.) 

 Glabrous ; Ivs. roundish-rcnifonn, '.i — 5-l()bed, crenate ; petioles much longer 



than the peduncles; lonbcb 5— lO-Jlowcied, c;ii)itatc"; fr. roundish, smooth. — In 

 water, Penn. to Ga. Stems weak, 1— 211on{^. Leaves 1 — 2' diam., the middle 

 lobe smaller than the others. Petioles2— 3'long. Peduncle about 1' long. Jl. Aug. 



2. CRANTZIA. Nutt. 



In honor of Prof. Cranlz, nut hor of a monograph on the Umbellifera;. 



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

 globose, the conniiissure excavated, with 2 vitta3 ; carpels unequal, 5- 

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

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



C. LiNEATA. Nutt. (Hydrocotyle, Mlc/iz.) 



Lrs. cuneate-linear, sessile, obtuse at apex, and with transverse veins, 

 shorter than the peduncles.— Muddy banks of rivers, Ma.ss. ! 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 lamina. Umbels 4 — 8-flower- 

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

 red vittae. May — Jl. 



3. SANICtJLA. Tourn. 



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



Flowers 9 $ d" ; calyx tube echinate, segments acute, leafy ; pe- 

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

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

 %■ Umbel nearly simple. Rays few., icith many -flowered, capitate umbel- 

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



5. Marilandica, SanicU. 



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

 serrate ; sterile p. pedicellate, jertlk sessile ; calyx segments entire.— In low 

 woods, thickets, U. S., and Can., common. Stem r—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 — 4' 

 long, ^ 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. 



(jT. epvysLv, 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 vi'ttEe or scales. — Herbaceous or suffruticose. Fls. blue or white, 

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



1 E. AGit'ATicuM, Button Snake-root. 



Z/rs broadly linear, parallel-veined, ciliate with remote soft spmes ; 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, appearmg 

 like one of the Endogense. Very glaucous. Stem simple, 1-51 high. Leaves 

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

 inconspicuous. Jl. Aus^. 



2. E. ViRGiNiANUM. Lam. (E. aquaticum. Michx.) . . , r 



Lrs. linear-lanceolate, uncinatoly .serrate, tapering to both ends ; xnvol. oi 

 7—8 linear leaflets, longer than the heads, 3-cleft or spinose-dentate ; scales tri- 

 cuspidate.— U 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- 



