Zygogynum

Zygogynum is a genus of plant in the winter's bark family Winteraceae. 19 species are native to New Caledonia, and are pollinated primarily by beetles and moths.[3] Other species are native to New Guinea (21 species), the Bismarck Archipelago (1 species), the Solomon Islands (2 species), Lord Howe Island (1 species), and Queensland (2 species).[1]

Zygogynum
Zygogynum howeanum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Magnoliids
Order: Canellales
Family: Winteraceae
Genus: Zygogynum
Baill.
Synonyms[1][2]
  • Belliolum Tiegh.
  • Bubbia Tiegh.
  • Exospermum Tiegh.
  • Tetrathalamus Lauterb.

This genus is interesting for having the greatest range in the number of stamens in any genus: as few as three or as many as 370; a 123 fold difference in the number of stamens. The number of carpels can range from one to as many as fifty.[4]

Species

The genus includes 45 accepted species:[1]

  • Zygogynum acsmithii Vink – southeastern New Caledonia
  • Zygogynum amplexicaule (Vieill. ex P.Parm.) Vink – northern and western New Caledonia
  • Zygogynum archboldianum (A.C.Sm.) Vink – western New Guinea
  • Zygogynum argenteum (A.C.Sm.) Vink – New Guinea
  • Zygogynum baillonii Tiegh. – southeastern New Caledonia
  • Zygogynum bicolor Tiegh. – central New Caledonia
  • Zygogynum bosavicum Vink – New Guinea
  • Zygogynum bullatum (Diels) Vink – Mt. Stolle, New Guinea
  • Zygogynum calophyllum (A.C.Sm.) Vink – New Guinea
  • Zygogynum calothyrsum (Diels) Vink – New Guinea
  • Zygogynum clemensiae (A.C.Sm.) Vink – New Guinea
  • Zygogynum comptonii (Baker f.) Vink - northern New Caledonia
  • Zygogynum crassifolium (Baill.) Vink – New Caledonia
  • Zygogynum cristatum Vink – central New Caledonia
  • Zygogynum cruminatum Vink – New Guinea
  • Zygogynum cyclopensis Vink – New Guinea
  • Zygogynum fraterculus Vink – New Caledonia
  • Zygogynum haplopus (B.L.Burtt) Vink – Solomon Islands
  • Zygogynum howeanum (F.Muell.) Vink – Lord Howe Island
  • Zygogynum ledermannii (Diels) Vink – New Guinea
  • Zygogynum longifolium (A.C.Sm.) Vink – New Guinea and Bismarck Archipelago
  • Zygogynum mackeei Vink – northern New Caledonia
  • Zygogynum megacarpum (A.C.Sm.) Vink – western New Guinea
  • Zygogynum montanum (Lauterb.) Vink – Papua New Guinea
  • Zygogynum oligocarpum (Schltr.) Vink – Papua New Guinea
  • Zygogynum oligostigma Vink – central New Caledonia
  • Zygogynum pachyanthum (A.C.Sm.) Vink – New Guinea
  • Zygogynum pancheri (Baill.) Vink – east-central and southeastern New Caledonia
  • Zygogynum pauciflorum (Baker f.) Vink – Mont Panié, northern New Caledonia
  • Zygogynum polyneurum (Diels) Vink – western New Guinea
  • Zygogynum pomiferum Baill. – northern and central New Caledonia
  • Zygogynum queenslandianum (Vink) Vink – northeastern Queensland
  • Zygogynum schlechteri (Guillaumin) Vink – southeastern New Caledonia
  • Zygogynum schramii Vink – western New Guinea
  • Zygogynum semecarpoides (F.Muell.) Vink – northeastern Queensland
  • Zygogynum sororium (Diels) Vink – Schrader Range, Papua New Guinea
  • Zygogynum staufferianum Vink – Papua New Guinea
  • Zygogynum stipitatum Baill. – northern and central New Caledonia
  • Zygogynum sylvestre (A.C.Sm.) Vink – New Guinea
  • Zygogynum tanyostigma Vink – Mont Panié, northern New Caledonia
  • Zygogynum tieghemii Vink – central and southeastern New Caledonia
  • Zygogynum umbellatum (Ridl.) Vink – New Guinea
  • Zygogynum vieillardii Baill. – central and southeastern New Caledonia
  • Zygogynum vinkii F.B.Sampson – central New Caledonia
  • Zygogynum whitmoreanum Vink – Solomon Islands

References
  1. "Zygogynum Baill." Plants of the World Online, Kew Science. Accessed 24 April 2022.
  2. Vink, W. (1985). The Winteraceae of the Old World. V. Exospermum links Bubbia to Zygogynum. Blumea: Biodiversity, Evolution and Biogeography of Plants, 31(1), 39–55.
  3. Pellmyr, O.; Thien, L. B.; Bergström, G.; Groth, I. (1990). "Pollination of New Caledonian Winteraceae: Opportunistic shifts or parallel radiation with their pollinators?". Plant Systematics and Evolution. 173 (3–4): 143. doi:10.1007/BF00940859. S2CID 7894633.
  4. Kubitzki, Klaus (1993). Families and Genera of Vascular Plants. Vol. 2. Berlin: Springer Verlag. p. 637.


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