ORDER CVIII. — EUniORBIACE.E. 407 



posita. Flowers solitary, axillary, on peduncles as long as tlu' leaves. 

 Root very lon«^. — If. April — July. Sandy soils. 



9. E. PUBENTis'siMA, (Mlcb.) Stem erect, very pubescent, somewhat 

 dif'hotomous. Leaves opposite, sessile, elli|)tic, entire, slightly cordate, 

 obtuse. i^/o7{'(?r.s solitary in the division of the stem, on peduncles about 

 as long as the leaves; interior segments of the involucre white. — U. 

 April — July. Pine barrens. 12 — 18 inches, 



10. E. HELiosco'piA, (L.) Stem erect, glabrous, branching. Leaves 

 alternate, obovate, scattered, sessile, cuneate, finely serrate, the floral 

 ones obovate, or broad-lanceolate. Utnbel 5-cleft, with the small 

 branches dichotomous. Fruit smooth. — 0. May. Damp clay soils. 

 12 — 18 inches. 



11. E. corolla'ta, (L.) Stem erect, slightly hairy, usually simple. 

 Leaves alternate, oval, petiolate, varying in form. Floicers in terminal 

 umbels, conspicuous ; the inner segments of the involucre petaloid, ob 

 ovate. — U. Through the summer. In dry fields. 1 — 2 feet. 



Var. E. angustifo'lia, (Ell.) Leaves 3 — 4 inches long, linear-lanceolate, 

 sessile, hairy beneath ; the upper branches of the umbel dichotomous. — 

 If. May—Sept. Dry soils. Very common. 1 — 2 feet. 



12. E. panicula'ta, (Ell.) Stem slightly angled, hairy. Leaves large 

 for the genus, entire, with revolute margins, hairy along the midrib be- 

 neath. Flowers terminal, somewhat paniculate. Fruit smooth. — If. 

 Aug. — Sept. Middle Car. and Geo. 1 — 2 feet. 



Genus II.— STILLIN'GIA. Gard. 19—15. 

 (In honor of Dr. Benjamin Stillingfleet.) 



Monoecious. Involucre hemispherical, many-flowered. Pe- 

 rianth tubular, erose. Stamens 2 — 3, exserted. Fertile florets ; 

 perianth 1 -flowered, fimbriate or toothed. Stf/le trifid. Caj)- 

 sale 3-celled, 3-seeded. 



1. S. sylvat'ica, (L.) Stein herbaceous, somewhat angled, glabrous, 

 with a milky sap. Leaves sessile, oblong-lanceolate, serruhite, sub cori- 

 aceous, lucid on the upper surface. Flowers in a terminal spike, the 

 upper ones sterile, with a few fertile ones at the base. — If. May — 

 June. Sandy soils. 2 — 3 feet. Queens Dcli<jht. 



2. S. sebif'era, (L.) a small tree, with glabrous branches, yielding 

 a milky juice or sap. Leaves alternate, petiolate, rhomboidal, acumin- 

 ate, entire, with a gland on the petiole. Flowers in terminal spikes, 

 with the fertile ones few at the base of the spikes. Livolucrc 10 — 12- 

 flowered. Perianth 4-toothed. Sti/les 3, subulate. Capsule black. 

 Seed vrlnte. — "^ . June — July. Introduced. 20 — 10 feet. 



3. S. ligustui'na, (Mich.) A shrub much branched, glabrous. Leaves 

 lanceolate, tapering, entire, petiolate. Flowers in terminal spikes. 

 Sterile florets numerous at the summit; fertile ones few at the ba.-^e. 

 Involucre 1 — 2-flowered. Ferianth 3-cleft. — ^. May — July. Mar- 

 gins of creeks. 6 — 12 feet. 



