ORDER CTin. ETJPHORBIACE.E. 497 



posits. Flowers solitary, axillary, on peduncles as long as the leaves. 

 Root very long. — 2f . April — July. Sandy soils. 



9. E. pubentis'sima, (Mich.) Stem erect, very pubescent, somewhat 

 dichotomous. Leaves opposite, sessile, elliptic, entire, slightly cordate, 

 obtuse. Flowers solitary in the division of the stem, on peduncles about 

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

 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. Umbel 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. Flowers in terminal 

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

 ovate. — If. 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. Style trifid. Cap- 

 side 3-celled, 3-seeded. 



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

 with a milky sap. Leaves sessile, oblong-lanceolate, serrulate, 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 Delight. 



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. Involucre 10 — 12- 

 flowered. Perianth 4-toothed. Styles 3, subulate. Capsule black. 

 Seed white. — ^ . June — July. Introduced. 20 — 40 feet. 



3. S. ligustri'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 base. 

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

 gins of creeks. 6 — 12 feet. 



