160 UMBELLIFERJE. (PARSLEY FAMILY.) 
lobed or toothed leaves, and white or blue braeted flowers closely sessile in- 
dense heads. 
* Fruit scaly: stems erect. 
1. E. yucceefolium, Michx. Leaves linear, concave, bristly or some- - 
what spiny on the margins, parallel-veined; leaves of the involucre mostly | 
entire, shorter than the broadly ovate head ; bracts entire. — Pine barrens, most- 
ly in damp soil, Florida, and northward. June. ) —Stem 29-3? high. 
Leaves distant, the lowest ones 19 - 119 long. Flowers white. 
2. E. Ravenelii, Gray. Leaves linear, elongated, nearly terete, grooved 
on the upper surface, obscurely, denticulate ; leaves of the involucre 3-cleft, as 
long as the head; bracts 3-cleft, spine-pointed, longer than the flowers. — Low 
pine barrens, near the head-waters of Cooper river, South Carolina. Ravenel. 
Sept. and Oct. — Stem 13? - 39 high. Flowers white. 
3. E. Virginianum, Lam. Leaves linear-lanceolate, flat; the lowest 
ones spiny-serrate with the teeth incurved, or nearly entire, veiny; the upper 
narrower, spiny or pinnatifid; leaves of the involucre (blue) 3 — 5-cleft, longer 
than the head; bracts 3-cleft, as long as the flowers.— Marshes, Florida t0 — 
Mississippi, and northward. July. 1} or (9) — Stem 929-39 high. Flowers 
blue. 3s 
4. E. preealtum, Gray. Leaves lanceolate, flat, veiny, serrate; the up- - 
per ones linear, spiny-toothed; leaves of the involucre 2-3 times as long as the 
head; bracts tricuspidate, barely as long as the mature calyx. (E. Virginia- 
num, Ell.) — Fresh marshes near the coast, Georgia to North Carolina. August 
— Stem 4°-6° high. Lowest leaves 19 - 2? long and 2}/-3! wide. Flowers 
white. 
5. E. virgatum, Lam. Leaves short, oblong or oblong-ovate, serrate, 
the upper ones toothed or divided; leaves of the involucre entire, or with 2-4 
bristly teeth, longer than the head; bracts 3-toothed. (E. ovalifolium, Michr) — 
—Pine-barren swamps, Florida to North Carolina, and westward. August. — 
Stem 19-20 long. Leaves 2/-3'long, sometimes cordate. Flowers blue. | 
* * Fruit granular: stems diffuse. 
6. E. aromaticum, Baldw. Stems clustered, prostrate, very leafy; x 
leaves spatulate, pinnately lobed, cartilaginous on the margins; the 3 upp - 
. lobes broad and spine-pointed, the lower ones scattered and bristlelike; leaves — 
D. of the involucre 3-cleft, longer than the globose head; bracts 3-toothed. — D'Y 
_ pine barrens, East and South Florida. Sept. — Stems 1' long. 
_ 7. E. Baldwinii, Spreng. Small, prostrate, branching ; leaves thin; de 
st ones ovate, sharply serrate or toothed, long-petioled, the others i 
With the middle segment lanceolate and commonly 3-toothed ; leaves of the in- ; 
 volucre subulate, longer or shorter than the oblong head; bracts spatulate, ob 
tuse, barely exceeding the calyx. — Low sandy pine barrens, Georgia, Florilh 
and westward. B I 
