Amorimia subg. Amorimia

Almeida, Rafael Felipe De, Amorim, André Márcio, Corrêa, Angela Maria Da Silva & Berg, Cássio Van Den, 2017, A new infrageneric classification for Amorimia (Malpighiaceae) based on morphological, phytochemical and molecular evidence, Phytotaxa 313 (3), pp. 231-248 : 243

1. Amorimia subg. Amorimia ( Fig. 9 10 ).

The nominate subgenus differs from Amorimia subgenus Uncinae by its sepals adaxially hairy; sepal glands yellow turning orange or red or ocher; petals elliptic, base truncate to hastate, adaxially entirely to distally hairy, claws canaliculate; anthers always hairy (at base, connective and/or apex); styles with the apex truncate, acuminate or rounded; and pollen grains polygonal.

Notes:— This subgenus includes eight species mostly restricted to seasonally dry to evergreen forests from eastern South America: A. andersonii , A. candidae , A. coriacea , A. exotropica ( Grisebach 1858: 93) Anderson (2006: 180) , A. maritima ( Jussieu 1840: 259) Anderson (2006: 181) , A. pellegrinii , A. rigida and A. velutina ( Fig. 10 ).

Figures

FIGURE 9. Synapomorphies of Amorimia (clade A): bracts glandular, petals pubescent on both sides, samaras with the two lateral wings larger than the dorsal wing and presence of monofluoracetate. Synapomorphies of Amorimia subg. Uncinae (clade B): sepals acute at apex and glabrous abaxially, elaiophores green turning yellow, petals yellow never turning orange or red with age and cuneate at base, styles uncinate at apex and pollen grains spherical. Synapomorphies of Amorimia subg. Amorimia (clade C): sepals rounded at apex and pubescent abaxially, elaiophores yellow turning red to ochre, petals yellow turning orange to red with age and truncate at base, styles truncate at apex and pollen grains polygonal. Synapomorphies of Mascagnia: elaiophores pink turning ochre with age, petals keeled and samaras with lateral wings larger than dorsal wing, and fused into an orbicular wing. Synapomorphies of Ectopopterys: sepals eglandular, deflexed, anther with enlarged connectives, apex of foliate styles and samaras with the dorsal wing larger than the lateral wings thickened on the lower side.

FIGURE 10. Distribution map of species from Amorimia subg. Amorimia: ●—A. exotropica; ○—A. rigida; ▲—A. coriacea; Δ—A. candidae; ■—A. velutina; □—A. maritima; *—A. pellegrinii; A—A. andersonii. South American phytogeographical domains: Amazon rainforest—light green, Chaco/Pantanal—yellow, cerrado—orange, caatinga—white, Atlantic Forest—dark green, and Pampas—blue.