Eryngium. UMBELLIFERiTK. C05 



p. 95. E. yuccaefolium, Michx. .' JI.l. p. 1(54. E. Vlrginianum 6cr., Plvk. 

 aim. I. 175, /. 4. 



Swamps, Virginia I to Florida I Illinois! Texas I — @? Varial)lo in sizo 

 and in tiie brcadiii of the leaves; wjuiotimcs scancly a l(X)t hiph, with leaves 

 2-3 lines wide ; and in favorable siluaiions aitaininp the heisilil of 4-G feet, 

 and the leaves an inch or more in breadth. Heads thre^'-foiirths of an inch 

 long. Loaliets of the invohuels rarely t(x)ihed. Calyx-tube with acute 

 scales. — Button Snake-root. — Root bitter, aromatic and pungent, reseinblinj^ 

 in its medicinal properties the Seneca Snake-rciot, and highly esteemed as a 

 diapiioretic and expectorant in the Southern States. Ell. 



•y — 7. E. Vlrginianum (Lam.) : leaves linear-lanceolate and linear, iincin- 

 ately (rarely spinulose-) serrate ; leaves of tlie involucre 7-8, usually longer 

 than the heads, 3-cleft, or dentate-spiny ; scales tricuspidate. — Lam. diet. 4. 

 p. 759; Laruchc, Eryng. p. 48, t. 19 ; Pursh, fl. 1. p. 189 ; EU. sk. 1. p. 

 343; DC.'prodr. 4. p. 95. E. acpiaticum, Michx.! Jl. 1. ;;. 1G3. E. 

 Plukenetii, Ell. I. c. p. 582. E. aquaticum, 0. Linn. spec. {ed. 1.) 1. ]>. 232. 

 Eryngium &:c., Plvk. aim. t. 396, /. 3. 



Swam])s, New Jersey ! to Florida! and west to Texas! — (5) Stem 1^—5 

 feet high, cymosely branclied and often compound at the summit, fistidous. 

 Radical and lower cauliiie leaves usually 5-10 lines wide, hut sometimes 

 very narrow, tapering at eacli end ; llie teeth often very remote and indis- 

 tinct. Heads numerous, three-fourths of an inch in diameter, pale i)lue or 

 nearly white. Scales sometimes entire, or with only a single lateral cusp. 

 Calyx-tube imbricated with acute lanceoLite vesicles. — This and the jjreced- 

 ing species were confounded by Linna?us, and were first distinguished by 

 Lamarck. 



-/— 8. E. virgatum (Lam.) : leaves oval, membranaceous; the cauline ones 

 otj short petioles, toothed or acutely serrate ; involucre (6-8-leaved) longer 

 than the subglobose heads ; scales tricuspidate. — Lam. diet. 4. p. 757 ; 

 Pursh, fl. 1. p. 189 ; DC. prodr. 4. p. 94. E. ovalifoHum, Michx. ! fl. 1. p. 

 163; Ell. sk. \. p. 343. 



Damp places in pine barrens. South Carolina ! to Florida ! and west to 

 Louisiana. .luly-Sept. — li Stem 1-3 feet long, erect or decumbent, 

 dichotomously branched at the summit. Leaves reticulately veined : radi- 

 cal ones with petioles 1-2 inches long, entire or crenately toothed ; cauline 

 ones often subcordate ; the serratures with a narrow cartilaginous border. 

 Involucral leaves linear-lanceolate, either entire or with 2-4 spiny teeth. 

 Heads half an inch in diameter. Flowers white or pale blue. Scales of the 

 calyx-tube acute. 



9. E. Baldicinii (Sprang.) : stem prostrate, and often creeping, filiform, 

 branching ; leaves membranaceous ; radical and lower cauline ones ovate, 

 petiolate, entire or somewhat lobed, remotely and acutely toothed ; upper 

 cauline ones 3-cleft or 3-parted, usually sessile ; the lateral segiiients nar- 

 rower (often linear) and entire, middle one 2-3-loothed or entire ; heads 

 (very small) ovate, on axillary peduncles ; involucre much shorter than the 

 heads; scales subulate, entire. — Spreng. ! syst. 1. p. 871 ; DC. prodr. A. p. 

 92. E. gracile, Baldw. ! in Ell. sk. 1. p. 345; JSutt.! gen. I.p. 175 ; not 

 of Laroche. E. integrifolium, IFa//. C«r. p. 112 .' 



ff. involucre longer than the heads. — E. prostratum, Nutt..' in DC. prodr. 

 4. p. 92. 



Pine woods from St. Mary's, Georgia, to St. Augustine, Florida, Balduin! 

 Southern Florida, Dr. Burrows! Mr. F. Cozzens! /?. Moist soils, Milledge- 

 ville, Georgia, Dr. Boykin! Middle Florida, Mr. Croom! and Dr. Chap- 

 man ! Kentucky, Short! Arkansas, ?s'uttall .'— (D ? Stem 6-18 long, branch^ 

 ing from the base. Leaves 8-12 lines long; the lower cauline ones often 



