Ertogium. LXVll. UMBELLIFER^. • 285 



4. H. RANUNCULoiDEs. Linn. f. (H. cymbulaxifolia. MiiM.) 



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



than the peduncles; ^imbdsb — lO-flowered, capitate; //•. roundish, smooth. — In 



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



lobe smaller than the others. Peliole.s2 — 3' long. Peduncle about 1' long. Jl. Aug. 



2. C RANT Z I A. Nutt. 



In honor of Prof. Crantz, author ofa monograph on the UmbellifersB. 



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

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

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

 ar or filiform, entire haves. Umbels siruple, involtocrate. 



C. i.iNEATA. Nutt. (Hydrocotyle. Michx.) 



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

 shorlar 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 laminoe. Umbels 4 — 8-flower- 

 ed. Peduncles \ longer than the leaves. Involucre 4 — 6-!eaved. Fruit with 

 red vittae. May — JL 



3. SANIClJ'LA. Toum. 



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



Flowers 9 5 J* ; 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, toitk many-flowered, capitate umbel' 

 lets. Involncre of few, ofteti cleft leaflets, involucel of several, entire. 



S. Marilandica. Sanicle. 



Lvs. 5-paried, digitate, mo:>tly radical; Ifts. or segments, oblong, incisely 

 serrate; sterile fs. pedicellate, /cr/Zfe sessile; calyx segments entire. — In low 

 woo('s, thickets, U. S., and Can., common. Stem 1 — 2f high, dichotomously 

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



fiarted to the base, with the lateral segments deeply 2-parted. Segments 3-— 4' 

 ong. \ as wide, irregularly and mucronately toothed. Cauline leaves few, 

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

 belle;s capitate. Flowers mostly baiTen, white, sometimes yellowish. Fruit 

 densely clothed with hooked bristles. Jn. 



4. ERFNGIUM. Toum. 



Gr. cpvyBiv, to belch; a snpposed remedy for Batulence. 



Flowers sessile, collected in dense heads ; calyx lobes somewhat 

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

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

 out vittse or scales. — Herbaceous or suffruticosc. Fls. blue or white 

 brac'eate ; lower bracts hivolucrate, the others smaller and paleaceous. 



1. E. AQUATicuM. 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. 1 111., &c. A remarkable plant, appearing 

 like me of the Endogeriee. Very glaucoiis. Stem simple, 1 — of high. Leaves 

 often 1 — 2f long, A — ^^i'wide. Heads pedunculate, J — I'diam. Flowers white, 

 inconspicuous. Jl. Au^. 



2. E. ViRGiNiAN-uM. Lam. (E. aquaticum. Michx.) 



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

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

 cusp date. — 1\. Marshes, N. J. to Ohio, Prof. Lnclc! Siivl'Ls-. Stem hollow, 

 3 — if high, branched above. Leaves G — 10' by 5 — 10", upper ones much small- 



