Penaea

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.^[3]

Penaea
Penaea mucronata
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Myrtales
Family:	Penaeaceae
Genus:	Penaea L.[1]
Species
See text
Synonyms[2]
Brachysiphon A.Juss. Endonema A.Juss. Glischrocolla (Endl.) A.DC. Saltera Bullock Sarcocolla Boehm. Sarcocolla Kunth Sonderothamnus R.Dahlgren Stylapterus A.Juss.

Penaea atop Table Mountain in Cape Town, South Africa

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.