Ayenia filiformis

S. Watson

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

Common names: Trans-Pecos ayenia
Illustrated
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 ovatelanceolate 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, ovatelanceolate, 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

Distribution

V6 365-distribution-map.jpg

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

Discussion

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

Selected References

None.

Lower Taxa

None.

... more about "Ayenia filiformis"
not +  and appendaged +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
3(-5)-veined +
protruding +
clavate +, cylindric +  and filiform +
Laurence J. Dorr +
S. Watson +
attenuate +  and rounded to truncate +
2 cm20 mm <br />0.02 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
ovate +  and orbiculate +
0.2cm;1cm +
septicidal +, loculicidal +  and dehiscence +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
stellate-hairy +
5 cm50 mm <br />0.05 m <br /> (?) +
filiform +
Trans-Pecos ayenia +
not 1-3(-11)-flowered +
4.3 cm43 mm <br />0.043 m <br /> (7 cm70 mm <br />0.07 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4.3 cm43 mm <br />0.043 m <br />) +
unlobed;oblong-ovate;ovatelanceolate or linear +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Ariz. +, N.Mex. +, Tex. +, Mexico (Chihuahua) +, Mexico (Sinaloa) +, Mexico (Sonora) +  and Mexico (Zacatecas) +
1000–1500 m +
sparse;copious +
actinomorphic +
septicidal +, loculicidal +  and dehiscence +
loculicidal +  and septicidal +
subspheric +  and oblate +
On limestone and granite soil, steep rocky slopes, canyons, sandy washes +
multicellular +  and simple +
1-11-flowered +  and cymose +
terminal +  and axillary +
connate +  and distinct +
1mm +  and 2.5mm +
rhombic +  and subtriangular +
1mm +  and 2mm +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
erose +  and entire +
entire +, dentate +, serrate +  and doubly serrate +
(1-)2-many +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
5 +  and 4 +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering and fruiting spring–early fall. +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Proc. Amer. Acad. Arts +
septicidal +, loculicidal +  and dehiscence +
tuberculate +
2mm +  and 3mm +
persistent +
not reflexed +
stellate-hairy +
ovatelanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Illustrated +
rounded +  and cylindric +
3-7-veined +  and unarmed +
hairy +, glabrescent +  and stellate-puberulent +
Ayenia cuneata +  and A. reflexa +
Ayenia filiformis +
species +
erect +  and decumbent +