Rhopalostylidinae is a botanical subtribe consisting of two genera of palms from

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

and

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

, ''

Hedyscepe ''Hedyscepe canterburyana'', the big mountain palm or umbrella palm, is the sole species in the genus ''Hedyscepe'' of the family Arecaceae. It is endemic to Lord Howe Island, Australia and is threatened by habitat loss. It is a solitary palm wit ...

'' and ''

Rhopalostylis ''Rhopalostylis'' is a genus of two species of palms native to the South Pacific. Both are smooth-trunked, with regular ringed scars from fallen leaves. The leaves are 3–5 m in length, and the leaf bases encircle the trunk. Distribution ''R ...

''. These two genera were formerly included in

Archontophoenicinae Archontophoenicinae is a botanical subtribe consisting of four genera of palms, namely ''Archontophoenix'' from Queensland and New South Wales and '' Actinokentia'', '' Chambeyronia'' and ''Kentiopsis'' from New Caledonia. Phylogenetic relationsh ...

, to which they are morphologically similar (Dowe 2010:233), until a recent revision (Dransfield, Uhl et al., 2005).

Description

The palms in this subtribe are medium-sized palms, with well-developed, distinct

crownshaft An elongated circumferential leaf base formation present on some species of palm is called a crownshaft. The leaf bases of some pinnate leaved palms (most notable being ''Roystonea regia'' or the royal palm but also including the genera ''Areca' ...

s and strictly

pinnate Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and in ...

leaves with generally short and massive petioles. The inflorescences are branched to two or three orders, with the prophyll and penduncular bracts similar (Uhl and Dransfield 1987:367).

Genera

References

* * * * {{Taxonbar, from=Q5836842 Plant subtribes