IGO UMDICLLIFKIUE. (I'AUSLEY FAMILY.) 



lobctl or tootlicd leaves, and white or blue bracted flowers closely sessile in 

 dense heads. 



* Fruit scahj : stans erect. 



1. E. yuccoefolium, Michx. Leaves linear, concave, Itristly or some- 

 what spiny on the margins, parallel-veined; leaves of the iiivoliuTc mostly 

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

 ly in damp soil, Florida, and northward. June. 1). — Stem 2°-3° liij^'h. 

 Leaves distant, the lowest ones 1° - li° 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. Ravencl. 

 Sept. and Oct. — Stem 1 ^° - 3° high. Flowers white. 



3. E. Virginianum, Lam. Leaves linear-lanceolate, flat; the lowest 

 ones spiny-serrate witli the teeth incurved, or nearly entire, veiny ; the upper 

 narrower, spiny or pinnatifid ; leaves of the involucre (blue) 3-5-clcft, longer 

 than the head ; bracts 3-cleft, as long as the flowers. — Marshes, Florida to 

 Mississippi, and nortliward. July. 1|. or (5) — Stem 2° - 3° higli. 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 as the 

 head; bracts tricuspidatc, barely as long as the mature calyx. (E. Virginia- 

 num, Ell.) — Fresh marshes near the coast, Georgia to North Carolina. August. 



— Stem 4°-C°high. Lowest leaves l°-2° long and 2^' -3' wide. Flowers 

 white. 



5. E. virgatum, Lam. Leaves short, oblong or oblong-ovatc, serrate, 

 the upper ones toothed or divided; leaves of the involucre entire, or with 2-4 

 bristly teeth, longer tlum the head; bracts 3-toothed. (E. ovalifolium, il//c/ir.) 



— rinc-barrcn swamj)?, Florida to North Carolina, and westward. August. — 

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



* * Fruit (/ranular : stems diffuse. 



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

 leaves spatuiate, pinnately lobcd, 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 3-toothcd. — Dry 

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



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

 earliest ones ovate, siiarply serrate or toothed, long-pctioled, the others 3-partcd, 

 with the middle segment lanceolate and commonly 3-toothed ; leaves of the in- 

 volucre subulate, longer or sliorter than the oblong head ; br.icts s[)atulate, ob- 

 tuse, barely exct'cding tlic calyx. — Low sandy pine barrens, (Jeorgia, Florida, 

 and westward. S<'[)tembcr. (j) ? — Stems 5'- 10' long. Flowers blue. 



8. E. Ccrvantesii, Lnroch. Stems prostrate, diffiiM-ly liranclird ; earli- 

 est leaves lanceolate or oblong, entire, or s])aringly foofiied, longix-tioled, the 

 Others sessile, 3-partcd, with the segments linear or filiform and entire; leaves 



