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FNA | Family List | FNA Vol. 6 | Malvaceae | Gossypium

1. Gossypium armourianum Kearney, J. Wash. Acad. Sci. 23: 558. 1933.

Wild cotton Wild cotton

Plants 1 m, compact. Stems terete, glabrate. Leaves: stipules subulate, 1–3 mm; petiole terete, 1/2 to as long as blade; blade unlobed, ovate, 1.5–3 cm, coriaceous, base cordate, apex acute or subacuminate, surfaces glabrate. Inflorescences solitary flowers. Pedicels 2–6.5 cm, with 3 prominent nectaries apically; involucellar bractlets deciduous before anthesis, ligulate, 0.5–1 cm, margins entire. Flowers: calyx 5–7 mm, apex subtruncate or 5-toothed; petals yellow with red spot at base, 2.5–4.5 cm; staminal column 12–14 mm, glabrous; style somewhat shorter than petals; stigmas 3–5. Capsules 3- or 4-locular, subglobose or ovoid, 1.5 cm, with sunken glands, externally glabrous, internally ciliate. Seeds 8 mm, strigose, with tightly appressed brownish hairs. 2n = 26.

Flowering spring–summer. Open, arid habitats; 100–200 m; introduced; Calif.; Mexico (Baja California).

Gossypium armourianum is native in restricted areas in Baja California, but naturalized near Palm Springs from an introduction in the 1930s.


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