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

3. Ayenia filiformis S. Watson, Proc. Amer. Acad. Arts. 24: 42. 1889.

Trans-Pecos ayenia Trans-Pecos ayenia

Ayenia cuneata Brandegee; A. reflexa Brandegee

Subshrubs, decumbent or erect, 0.2–0.5(–0.9) m. Stems hairy, hairs simple and retrorse or simple and stellate. Leaves: petiole 0.4–1(–1.5) cm; blades of proximal leaves ovate to orbiculate, 0.5–2(–3.2) × 0.2–1(–1.5) cm, distal oblong-ovate to ovate-lanceolate or linear, unlobed, 1–4.3(–7) × 0.2–1(–1.5) cm, base rounded to truncate, margins serrate to doubly serrate or dentate, sometimes ciliate, apex subacute, 3(–5)-veined from base, surfaces usually stellate-puberulent, sometimes glabrescent. Cymes axillary, not borne on short shoots (brachyblasts), 1–3(–11)-flowered; peduncle 2–4(–7) mm. Pedicels 2–4(–7) mm. Flowers: sepals persistent, not reflexed at anthesis, ovate-lanceolate, 1–3 mm, stellate-hairy abaxially; petal claws 2–2.5(–6) mm, lamina subtriangular or rhombic, 1–2.5 × 1–2 mm, base ± attenuate on claw, margins entire, apex notched, surfaces hairy abaxially, hairs simple, multicellular, abaxial appendage filiform to slightly clavate, 0.7 mm; androgynophore 2–3 mm; stamen filaments present; stigmas slightly exserted. Capsules oblate, 2–4 × 5 mm, densely stellate-hairy, prickles 0.5–1 mm. Seeds 2–3 mm, tuberculate.

Flowering and fruiting spring–early fall. On limestone and granite soil, steep rocky slopes, canyons, sandy washes; 1000–1500 m; Ariz., N.Mex., Tex.; Mexico (Chihuahua, Sinaloa, Sonora, Zacatecas).

In Texas, Ayenia filiformis is known from the trans-Pecos region.


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