Penaea Explained

Penaea is a genus of flowering plants in the family Penaeaceae, found in southern South Africa. They have an unusual type of embryo sac development; after two rounds of mitosis, four nuclei are formed at each pole, leading to a mature embryo sac containing four polar groups each with three cells. When found in other taxa, these embryo sacs are termed Penaea-type.^[1]

Species

Currently accepted species include:^[2]

• Penaea acuta Thunb.
• Penaea acutifolia A.Juss.
• Penaea candolleana Stephens
• Penaea cneorum Meerb.
• Penaea dahlgrenii Rourke
• Penaea dubia Stephens
• Penaea ericifolia (A.Juss.) Gilg
• Penaea ericoides (A.Juss.) Endl.
• Penaea formosa Thunb.
• Penaea fruticulosa L.f.
• Penaea fucata L.
• Penaea geneiophora Byng & Christenh.
• Penaea gigantea (R.Dahlgren) Byng & Christenh.
• Penaea lanceolata (R.Dahlgren) Byng & Christenh.
• Penaea lateriflora L.f.
• Penaea micrantha (R.Dahlgren) Byng & Christenh.
• Penaea microphylla (Rourke) Byng & Christenh.
• Penaea mucronata L.
• Penaea mundii (Sond.) Byng & Christenh.
• Penaea petraea (W.F.Barker) Byng & Christenh.
• Penaea retzioides (Sond.) Byng & Christenh.
• Penaea rupestris (Sond.) Byng & Christenh.
• Penaea ruscifolia (R.Dahlgren) Byng & Christenh.
• Penaea sarcocolla L.
• Penaea speciosa (Sond.) Byng & Christenh.
• Penaea sulcata (R.Dahlgren) Byng & Christenh.

Notes and References

1. 10.3390/life10070104 . Endosperm of Angiosperms and Genomic Imprinting . 2020 . Kordyum . Elizabeth L. . Mosyakin . Sergei L. . Life . 10 . 7 . 104 . 32635326 . 7400472 . free . 2020Life...10..104K .
2. Web site: Penaea L. . . 2017 . Plants of the World Online . Board of Trustees of the Royal Botanic Gardens, Kew . 26 July 2020 .