Sandhill Clammyweed

Large clammyweed is a sticky, unscented annual herb of 10–60 cm (3.9–23.6 in). It has branched or unbranched, green or purple stems with seated glands and glandular hairs. The 0.3–1.5 mm (0.012–0.059 in) long, green or purple leaf stalks are often at an angle with the leaf blade. The leaf blade consists of three narrow, 0.9–3.5 cm (0.35–1.38 in) long and only 1–2 mm (0.039–0.079 in) wide, somewhat fleshy leaflets, the right and left halves more or less folded towards each other (or conduplicate) with entire margins, a needle-like tip, the underside of the leaf with many, and the upper side with few glands. The bilaterally symmetrical flowers are set in gland-covered racemes that are initially 1–3 cm (0.39–1.18 in) long but that keep growing to 6–8 cm (2.4–3.1 in) when fruits are ripe. Each individual flower is subtended by a bracts consisting of one or three entire bractlets, which have an oval shape and are 7–15 mm (0.28–0.59 in) long. The stalk of the individual flower is 1−2.3 cm (0.4-0.9 in) long. The four deciduous, eventually deflected, green to purple coloured, hairless sepals are lanceolate to inverted egg-shaped, 2.5–3.5 mm (0.1–0.14 in) long and 0.8–1.3 mm (0.03–0.05 in) wide, with entire margins and a pointy tip. The four petals are mostly creamy white, oblong-ovate, consist of a more yellowish straight and narrow claw and a wide plate. …

Large clammyweed naturally occurs in Texas and adjacent parts of Arkansas, Louisiana and Oklahoma, where it can be found in fields, prairies, sandy hillsides and open woodland.

== References ==