Classification
 Subordinate Taxa
 Nomenclature
Scientific Name:
Nothofagus Blume, Mus. Bot. 307 (1851), nom. cons.
Synonymy:
  • Fagus sect. Nothofagus (Blume) A.DC., Prodr. (DC.) 16, 121 (1864)
  • = Fagaster Spach, , 142 (1841)
  • = Calucechinus Hombr. & Jacquinot, Voy. Pôle Sud, Bot. Atlas t. 6 (1843)
  • Nothofagus subgen. Molischia sect. Calucechinus (Hombr. & Jacquinot) Krasser, Ann. K. K. Naturhist. Hofmus. 11: 162 (1896) nom. inval.
  • = Calusparassus Hombr. & Jacquinot in Hombron & Jacquinot, Voy. Pôle Sud, Bot. Atlas t. 6 (1843) nom. rej.
  • Nothofagus subgen. Molischia sect. Calusparassus (Hombr. & Jacquinot) Krasser, Ann. K. K. Naturhist. Hofmus. 11: 163 (1896)
  • = Fagus sect. Eufagus A.DC., Prodr. (DC.) 16, 118 (1864) nom. inval., pro parte
  • = Nothofagus subgen. Molischia Krasser, Ann. K. K. Naturhist. Hofmus. 11: 162 (1896) nom. inval.
  • = Nothofagus subgen. Pumiliae (Steenis) Baum.-Bod. (1929) nom. inval.
  • Nothofagus sect. Calucechinus subsect. Pumiliae Steenis, J. Arnold Arbor. 34: 336 (1953)
  • Nothofagus subgen. Nothofagus sect. Pumiliae (Steenis) Hill & Read, Bot. J. Linn. Soc. 105: 69 (1991)
  • = Nothofagus sect. Deciduae Steenis, Blumea 7: 146 (1952)
  • = Nothofagus sect. Plicatae Steenis, Blumea 7: 306 (1952) nom. illeg.
  • = Nothofagus sect. Calucechinus subsect. Antarcticae Steenis, J. Arnold Arbor. 34: 334 (1953) nom. inval.
 Description

Deciduous or evergreen trees up to 20 m high. Stipules peltate. Leaves distichous; fimbrial vein absent, with globular, glandular trichomes on cuticle; unicellular trichome type A absent; solitary unicellular trichomes type C absent. Stomata parallel to long axis of leaf; with thickened T-pieces of cuticle at the poles separating the two guard cells, without giant stomata over the major veins; stomata size within the areoles ± even. Upper epidermal cells over veins more elongate than areolar cells, with granular cell walls. Male dichasium 1–3-flowered; perianth campanulate, lobes prominent; stamens <20, developing centripetally; anthers slightly curved; distal connective protrusion weakly developed, filament connective free, without epidermal papillae. Female dichasium with 1 central dimerous flower and 2 lateral trimerous flowers, or 1 trimerous flower missing; stigmas tongue-shaped and decurrent. Cupule with 4 valves; outer surface of valves with simple trichomes; lamellae membranous; nuts triquetrous or lenticular, 2- or 3-winged.

Pollen: Peritreme, mesocolpia straight to convex; colpi short, spatulate or parallel-sided, with U-shaped ends, margins conspicuously thickened, annulate, aperture 4–11 µm long, polar to equatorial length ratio = 0.3.

 Distribution

New Zealand, Chile, Argentina. Nothofagus is endemic to southern South America (Chile and Argentina) with five species. One species is documented as a casual naturalisation in New Zealand.

 Biostatus
Exotic
Number of species in New Zealand within Nothofagus Blume
CategoryNumber
Exotic: Casual1
Total1
 Bibliography
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Candolle, A.L.P.P. de 1864: Prodromus Systematis Naturalis Regni Vegetabilis. Vol. 16. Part 2. Victoris Masson et fillii, Paris.
Cockayne, L.; Allan, H.H. 1934: An annotated list of groups of wild hybrids in the New Zealand flora. Annals of Botany 48: 1–55.
Cockayne, L.; Atkinson, E.H. 1926: On the New Zealand wild hybrids of Nothofagus. Genetica 8: 1–43.
Du Rietz, G.E. 1930: On domatia in the genus Nothofagus . Svensk Botanisk Tidskrift 24: 4.
Ford, K.A.; Heenan, P.B.; Smissen, R.D. 2016: Nothofagaceae. In: Breitwieser, I.; Brownsey, P.J.; Wilton, A.D. Flora of New Zealand — Seed Plants. Fascicle 3. Manaaki Whenua Press, Lincoln.
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Heenan, P.B.; Smissen, R.D. 2013: Revised circumscription of Nothofagus and recognition of the segregate genera Fuscospora, Lophozonia, and Trisyngyne (Nothofagaceae). Phytotaxa 146(1): 1–31.
Hill, R.S.; Read, J. 1991: A revised infrageneric classification of Nothofagus (Fagaceae). Botanical Journal of the Linnean Society 105: 37–72.
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Poole, A.L. 1952: The development of Nothofagus seed. Transactions of the Royal Society of New Zealand 80: 207–212.
Poole, A.L. 1958: Studies of New Zealand Nothofagus species. 3. The entire-leaved species. Transactions of the Royal Society of New Zealand 85: 551–564.
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Steenis, C.G.G.J. van 1952b: Preliminary account of Papuan Nothofagus. Blumea 7: 146–147.
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