. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 468 EUPHORBIACEAE. Vol. 15. Chamaesyce Preslii ( Arthur. Large or Upright Spotted Spurge. Fig. 2746. Euphorbia Preslii Guss. Fl. Sic. Prodr. i ; 539. 1827. Euphorbia hypericifolia A. Gray, Man. 407. 1848. Not L- 1753- Chamaesyce Preslii Arthur, Torreya 11 : 260. 1912. Annual, glabrous or sparingly pubescent. Stem branched, at least above, ascending o
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 468 EUPHORBIACEAE. Vol. 15. Chamaesyce Preslii ( Arthur. Large or Upright Spotted Spurge. Fig. 2746. Euphorbia Preslii Guss. Fl. Sic. Prodr. i ; 539. 1827. Euphorbia hypericifolia A. Gray, Man. 407. 1848. Not L- 1753- Chamaesyce Preslii Arthur, Torreya 11 : 260. 1912. Annual, glabrous or sparingly pubescent. Stem branched, at least above, ascending or erect, y'-2'' high, the branches mostly spreading, often recurved at the ends; leaves opposite, oblong, or linear-oblong, varying to ovate or obovate, often falcate, oblique, 3-nerved, unequally serrate, often with a red blotch and red margins, short-petioled; stipules triangular, slightly lacerate; involucres narrowly obovoid, ; long, one-half or one-third as long as the peduncles, bearing 4 glands subtended by orbicular or reniform entire white or red appendages; capsule glabrous, 1" in diameter; seeds oblong-ovoid, i" long, 4-angled, with broken transverse ridges. In fields and thickets, Ontario to Massachusetts, Flor- ida, Wisconsin, Nebraska and Texas. Has been con- fused with (Lag.) Small, of Mexico. May-Oct. 13. ZYGOPHYLLIDIUM Small, Fl. SE. U. S. 714. 1903. Annual herbs, with erect forking stems. Leaves opposite, rarely alternate on the lower part of the stem, narrow, equilateral, not oblique at the base, entire; stipules gland-like, often obsolete. Involucres delicate, short-peduncled in the upper forks. Glands S, broader than long, subtended by petal-like appendages. Capsules long-pedicelled, 3-lobed. Seeds terete, usually narrowed upward, more or less papillose, the caruncle sometimes wanting. [Greek, resembling Zygophyllum.] About 5 species, natives of North America. Type species: Zygophyllidium hexagonum (Nutt.) Small. I. Zygophyllidium
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