Ayenia microphylla
Ayenia euphrasiifolia
dense ayenia, little-leaf ayenia, shrubby ayenia
dwarf ayenia, eyebright ayenia
petiole 0.4–1.2 cm;
blades of proximal leaves orbiculate to suborbiculate, 0.5 × 0.4 cm, distal ovate to narrowly ovate, unlobed, 0.5–2.1(–3) × 0.4–1.8(–2) cm, base rounded or obscurely subcordate, margins serrate, stellate-hairy (not ciliate), apex acute to rounded, 3(–5)-veined from base, surfaces minutely, densely stellate-hairy.
petiole (0.1–)0.2–0.5 cm;
blade orbiculate to ovate, unlobed, 0.4–1.4 × 0.1–0.7 bifurcate, and fasciculate;
petal claws 2–3 mm, lamina rhombic to ± triangular, 1 × 1 mm, base attenuate on claw, margins entire, apex notched, surfaces slightly hairy abaxially, hairs minute, simple, or glandlike, abaxial appendage cylindric to ± clavate, 0.5 mm;
androgynophore (1–)2.2–3 mm;
stamen filaments present;
stigmas exserted.
to 4 mm.
sepals caducous, not reflexed at anthesis, ovate-lanceolate, 2.5–3.2 mm, densely stellate-pubescent abaxially;
petal claws 4 mm, lamina reniform-deltate, 1.4–1.6 × 1.5 mm, base lobed, lobes ± rectangular, margins entire, apex with 2 widely spaced teeth, surfaces glabrous, abaxial appendage absent;
androgynophore 0.5–1 mm;
stamen filaments present;
stigmas scarcely exserted.
subspheric, 4–5 × 4–5 mm, puberulent to densely stellate-pubescent, prickles 0.5 mm.
oblate to subspheric, 4–5 × 4–5 mm, sparingly stellate-pubescent, prickles 0.3–0.5 mm.
3 mm, tuberculate.
2 mm, densely tuberculate.
axillary, borne on short shoots (brachyblasts), 1- or 2-flowered;
peduncle to 4 mm.
Ayenia microphylla
Ayenia euphrasiifolia
Ayenia microphylla can be distinguished from other Ayenia species in the flora area by the presence of short shoots (brachyblasts) from which leaves and inflorescences emerge. In Texas, the species is known from the trans-Pecos region.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
In Florida, Ayenia euphrasiifolia is found in the Florida Keys, south and east of Lake Okeechobee, and near Tampa Bay on the mainland.
Three subspecies, two of them endemic, are recognized in Cuba but are not recognized here; they are based on rather weak morphological characters (habit, vestiture, and
leaf texture) ostensibly correlated with vegetation type and soil substrate. If subspecies are accepted, plants in the flora area are subsp. euphrasiifolia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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