#POINTSETTIA CYME FULL#

A large elliptic leaf may be 4 inches long and 1Вѕ inches wide, including a 1-inch petiole.

#POINTSETTIA CYME FULL#

Leaves on branches may become elliptic-lanceolate and those on plants in full sun lanceolate. Generally, lower stem-leaves are ovate-elliptic with a wedge-shaped (cuneate) base and acuminate to acute apex. Leaves are simple and petiolate with considerable variation in shape and size. As shown by inset, mid-stem nodes may be prominent and support вЂњextraвЂќ branches. Photo 2: Plants generally have an open structure as a result of long internodes and caducous lower leaves.

Lower leaves are in opposite decussate pairs. Photo 1: This young plant has characteristic simple toothed leaves. When damaged, stems and leaves exude white sticky acrid sap. Lowermost lateral stems are longest with higher lateral stems gradually decreasing in length. At the time of flowering, with lower leaves dropping off early (caducous), leaves are concentrated at ends of branches where they are associated with the inflorescence (see below). Robust plants may bear multiple branches of varying size from enlarged nodes. Leaves, in opposite decussate pairs lower on the stem, may be in whorls at mid stem and again opposite or alternate on the upper stem. Plants typically do not have sub-branches of an appreciable size. Larger plants have lateral branches set-off the stem at about 45вЃ°. The terete stems are straight, stout and erect. Plants have a single stem with a branched tap root supported by descending fibrous roots. In most habitats, stems and branches are a pale green, but they may be reddish in full sun, with plant height varying from several inches to 3 feet. Toothed spurge, germinating with warm temperatures, varies considerably in size and structure, as determined by both habitat and summer weather. It is also called summer poinsettia and green poinsettia (and was formerly named Poinsettia dentata). Habitat preference is dry to mesic sandy to clayey soils found in woodland borders and openings, prairies and disturbed habitats, such as fields and roadsides.

In Arkansas, the species occurs statewide. In the U.S., toothed spurge occurs primarily from northeastern Colorado to Pennsylvania, south to southern-most Texas and east to Alabama and the Carolinas, as well as in disjunct populations in Arizona and California. The common name вЂњspurgeвЂќ derives from the Latin for вЂњpurge,вЂќ from the use of Euphorbia species as a purgative. The genus name recognizes Euphorbus, a Greek physician.* The specific epithet is from the Latin for вЂњtoothedвЂќ in reference to the leaf margins. Toothed spurge ( Euphorbia dentata) of the Spurge (Euphorbiaceae) family is a drought-tolerant summer annual with milky sap and a complex, bizarre inflorescence called a cyathium.

Pointsettia cyme