Richea pandanifolia

Location & distribution maps

Phylogeny & links to associated information

Wikipedia links:       Angiosperms > Eudicots > Asterids >  Ericales > Ericaceae > Richea pandanifolia

Other links:     

Plant  information

Common name:                Pandani

•  Also,  giant grass tree

Conservation status:  unknown

Etymology:   

Flowers:                  

• Inflorescences emerge from the leaf axils on structures called panicles (branched inflorescence) which can grow up to 25 cm long

• Their flowers can be either white of deep pink in colour

Fruit:                         

Leaves:         

• Strap-like leaves that taper to points and can grow up to 1 m long

• These are dense and form from terminus branches

• As the leaves age they are persistent, meaning that they remain on the plant

• Young leaves are green in colour but as they age they become a greyish brown

• The margins of these leaves are serrated and can cut human skin

Stem & branches: 

• While it usually grows from just one stem it can sometimes be branched

• This branching occurs in the lowland subspecies as well as in damaged alpine plants

Habit:        

• An erect tree or shrub

• It grows from 2 to 12 m in heigh

Habitat:   

• It can be found in deciduous heath, coniferous heath, alpine sedge land and heath in the central and western mountains

• It is also found in rain forests where it is more common as a tree

Distribution:                  

• Endemic to Tasmania, as are nine of the 11 species in the genus Richea

• Found in central, western and south west Tasmania

• Two theories may explain the diversity of Richea species in Tasmania:

  • One proposes that the diversity in endemic Tasmanian Richea species could be due to them being the relics of Gondwanan fragmentation

  • The other theory proposes that the diversity is the result of speciation subsequent to the breaking up of Gondwana

    •  This unusual display of endemism can be explained in part as Richea is a genus of Gondwanan origin

    • Since the break-up of Gondwana, mainland Australia has become inhospitable for many Gondwanan species and Tasmania has become a refuge for many genera that used to thrive on the supercontinent

Additional notes:     

• Taxonomy

  • The first European description of this plant was by botanist Joseph Dalton Hooker in his 1844 publication The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror. I. Flora Antarctica

  • In this publication Hooke named the species "Richea pandanifolia"

  • In 1891, Otto Kuntze transferred it to the genus Cystanthe

• There are two subspecies:

  • Richea pandanifolia Hook.f. subsp. pandanifolia

  • Richea pandanifolia subsp. ramulosa

• Richea pandanifolia can hybridise with Richea scoparia to make R. × curtisiae

• Identification

  • Richea pandanifolia is sometimes confused with Dracophyllum milliganii

  • R. pandanifolia can be distinguished from this rare species as D. milliganii has terminal inflorescence whereas R. pandanifolia 's inflorescence is in the leaf axis

  • R. pandanifolia also has serrated leaf margins whereas D. milliganii has smooth leaf margins

Sources of information:

• https://sites.google.com/view/plants-info/angiosperms/taxa/r/richea/richea-pandanifolia (2023)