Alvaradoa amorphoides subsp. psilophylla

(Urban) Cronquist

Brittonia5: 135. 1944

Basionyms: Alvaradoa psilophylla
Found in FNA Volume 9. Treatment on page 4.
FNA9 P1 Alvaradoa amorphoides.jpeg
Shrubs or trees, 10–70 dm. Stems of current year puberulent. Leaves glabrous except for puberulent rachis; rachis (including petiole) 9.5–21 cm; petiolules 1–1.5 mm; leaflets 17–35, abaxially pale green, adaxially olive, oblong to elliptic, 5–8(–10) × 14–19 mm, apex rounded. Racemes pendent; staminate-flowered racemes 7–15 cm, puberulent; pistillate-flowered racemes 7–10 cm, pubescent. Pedicels: staminate 1.5–2 mm; pistillate 1–2 mm. Staminate flowers: sepals 5, ovate, 1.5 mm, puberulent; petals 5, filiform, 3–3.5 mm, narrower than filaments; intrastaminal discs lobed; stamens 5, filaments 2–5 mm; pistils vestigial. Pistillate flowers: sepals 5, ovate, puberulent; petals 0; intrastaminal discs circular, thin, unlobed; stamens 0; pistils 3-carpellate, ovate, flattened, 2–2.2 × 1–1.4 mm, pubescent, stigmas unequal, 2 at apex of ovary, divergent, 3d slightly more proximal along medial line of pistil, sometimes only distal 2 stigmas present, 1 larger than other. Samaras stramineous or purplish tinged, flattened, (8–)10–12 × 2.7–3.2(–4) mm, dry, margins ciliate, puberulent; pedicels 6–10 mm.

Phenology: Flowering and fruiting year-round.
Habitat: Hammocks, pine woodlands, on limestone
Elevation: 0–20 m


Fla., West Indies (Bahamas, Cuba).


In the flora area, subsp. psilophylla is found in Miami-Dade County. Specimens of subsp. amorphoides from Mexico and Central America are, in general, more robust with longer, narrower fruits. Plants of subsp. amorphoides occur in a wider variety of habitats and are not obligate on limestone formations as are those of subsp. psilophylla.



AuthorW. Wayt Thomas +
BasionymAlvaradoa psilophylla +
Elevation0–20 m +
HabitatHammocks, pine woodlands, on limestone +
IllustratorMarjorie C. Leggitt +
PhenologyFlowering and fruiting year-round. +
ReferenceNone +
Taxon nameAlvaradoa amorphoides subsp. psilophylla +
Taxon parentAlvaradoa amorphoides +
Taxon ranksubspecies +
VolumeVolume 9 +