Pycnanthemum flexuosum
species of plant
Pycnanthemum flexuosum, commonly known as savanna mint, or savanna mountain-mint, is an herbaceous perennial plant native to the southeastern United States.
Description
Pycnanthemum flexuosum grows from elongate rhizomes and produces erect, quadrangular, freely branched stems. Inflorescences consist of compact, often head-like cymules arranged in terminal thyrses. The calyx is five-toothed and ranges from zygomorphic to actinomorphic; the corolla is zygomorphic and two-lipped, with an entire or notched upper lip and a three-lobed lower lip. There are four usually exserted stamens and a two-cleft, exserted stigma. Plants are canescent, with sharply to rounded-angled stems reaching 40–110 cm in height. Leaves are elliptic to elliptic-lanceolate, 1.5–5 cm long and 3–15 mm wide, with acute to obtuse tips and margins that are crenate with 1–4 teeth per side or rarely entire; bases are cuneate to rounded, and petioles are 0.5–5 mm long. The inflorescence forms flat-topped to high-domed heads 2–4 cm across, becoming more open in fruit. Bracts are canescent, aristate, and often whitened. The calyx is slightly zygomorphic with a 4–4.8 mm tube and white, acicular teeth 2.3–3.3 mm long.
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This entry incorporates text from “Pycnanthemum flexuosum” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.