Winitia, Chaowasku

Chaowasku, Tanawat, Aongyong, Kithisak, Damthongdee, Anissara, Jongsook, Hathaichanok & Johnson, David M., 2020, Generic status of Winitia (Annonaceae, Miliuseae) reaffirmed by molecular phylogenetic analysis, including a new species and a new combination from Thailand, European Journal of Taxonomy 659 (659), pp. 1-23 : 12

Key to the species of Winitia

1. Inner petals spreading at maturity...................................................................................................... 2 – Inner petals tightly cohering at maturity............................................................................................ 3

2. Flowers mostly clustered on large roots and at unswollen base of trunks; inner side of both petal whorls without a glaucous appearance, inner side of inner petals with shallow pits ................................................................ Winitia thailandana Chaowasku & Aongyong sp. nov.

– Flowers mostly clustered at swollen base of trunks; inner side of both petal whorls with a glaucous appearance; inner side of inner petals without pitted structures ....................................................... Winitia expansa Chaowasku ( Chaowasku et al. 2013)

3. Outer petals broadly ovate, 9–12 × 13–14 mm; inner petals slightly obovate to obovate, 10.5–12 × 7.5–9 mm; stamens tightly packed, not bending inward; each stigma generally with Ż 10 columnar lobes, lobes not deeply divided ........................................................................................................... ........... Winitia cauliflora (Scheff.) Chaowasku ( Chaowasku et al. 2013; basionym: Scheffer 1881)

– Outer petals elliptic to slightly ovate, 12.5 × 8.5–10 mm; inner petals elliptic to slightly ovate, 8.5–9 × 8–8.5 mm; stamens more loosely packed, slightly bending inward (best observable in outer-whorl ones); each stigma with 5–7 columnar lobes, lobes deeply divided ............................................. Winitia longipes (Craib) Chaowasku & Aongyong comb. nov.