ICO UMBELLIFER^E. ( PARSLEY FAMILY.) 



lobed or toothed leaves, and white or blue braeted flowers closely sessile in 

 dense heads. 



* F ruit scaly : stems erect. 



1. E. yuccsefolium, Michx. Leaves linear, concave, bristly or some- 

 what spiny on the margins, parallel-veined; haves of the involucre mostly 

 entire, shorter than the broadly ovate head ; bracts entire. — Pine barrens, most- 

 ly in (lamp soil, Florida, and northward. June. 1J. — Stem 2°«-3°bigh. 

 Leaves distant, the lowest ones 1°-Ii° long. Flowers white. 



2. E. Ravenelii, Gray. Leaves linear, elongated, nearly terete, groove, 1 

 on the upper surface, obscurely denticulate; leaves of the involucre 3-clcft, 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. Havnul. 

 Sept. and Oct. — Stem l£° - 3° 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-eleft, as long as the flowers. — Marshes, Florida tO 

 Mississippi, and northward. July. \ or ® — Stem 2° -3° high. Flowers 

 blue. 



4. E. prsealtum, Gray. Leaves lanceolate, flat, veiny, serrate; the up- 

 per ones linear, spiny-toothed; leaves of the involucre 2-3 times as long a^ 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°-G° high. Lowest leaves l°-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, Michx.) 



— Pine-barren swamps, Florida to North Carolina, and westward. August — 

 Stem 1°- 2° long. Leaves 2' -3' long, sometimes cordate. Flowers blue. 



* * Fruit granular : stems diffuse. 



6. E. aromaticum, Baldw. Stems clustered, prostrate, very leafy; 

 leaves spatulatc, pinnately lobed, cartilaginous on the margins ; the 3 upper 

 lobes broad and spine-pointed, the lower ones scattered and bristle-like; leaves 

 of the involucre 3-cleft, longer than the globose head ; bracts 8-toothed. — Dry 

 pine barrens, East and South Florida. Sept. — Stems 1' long. 



7. E. Baldwinii, Spreng. Small, prostrate, branching; leaves thin; the 



curliest ones ovate, sharply serrate or toothed, long-petioled, the others .'! parted, 

 with the middle Begment lanceolate- and commonly 3-tOOthed ; leaves of the in 



volucre subulate, longer or Bhortertban the oblong head; bracts Bpatulate, ob- 

 tuse, barely exceeding the calyx. — Low sandy pine barrens, Georgia, Florida, 

 and westward. September. (j) ? — Stems 5'- lO* long. Flowers blue. 



8. E. Cervantesii, Laroch. Stems prostrate, diffusely branched; earli- 

 est leaves lanceolate or oblong, entire, or sparing!) I bed, long-petioled, the 



others sessile, 3-partid, with the segments linear or Aliform and entire; leaves 



