Ayenia filiformis

S. Watson

Proc. Amer. Acad. Arts 24: 42. 1889.

Common names: Trans-Pecos ayenia
Synonyms: Ayenia cuneata Brandegee A. reflexa Brandegee
Treatment appears in FNA Volume 6. Treatment on page 205. Mentioned on page 204, 207.

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.

Phenology: Flowering and fruiting spring–early fall.
Habitat: On limestone and granite soil, steep rocky slopes, canyons, sandy washes
Elevation: 1000–1500 m


V6 365-distribution-map.jpg

Ariz., N.Mex., Tex., Mexico (Chihuahua, Sinaloa, Sonora, Zacatecas).


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

Selected References


Lower Taxa

... more about "Ayenia filiformis"
Laurence J. Dorr +
S. Watson +
Trans-Pecos ayenia +
Ariz. +, N.Mex. +, Tex. +, Mexico (Chihuahua +, Sinaloa +, Sonora +  and Zacatecas). +
1000–1500 m +
On limestone and granite soil, steep rocky slopes, canyons, sandy washes +
Flowering and fruiting spring–early fall. +
Proc. Amer. Acad. Arts +
Illustrated +
Ayenia cuneata +  and A. reflexa +
Ayenia filiformis +
species +