- ≡ Fagus sect. Nothofagus (Blume) A.DC., Prodr. [A. P. de Candolle] 16(2), 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. [A. P. de Candolle] 16(2), 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.
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.
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.
Category | Number |
---|---|
Exotic: Casual | 1 |
Total | 1 |