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Dictyosperma

January 31, 2023

Dictyosperma is a monotypic genus of flowering plant in the palm family found in the Mascarene Islands in the Indian Ocean (Mauritius, Réunion and Rodrigues). The sole species, Dictyosperma album, is widely cultivated in the tropics but has been farmed to near extinction in its native habitat.[3] It is commonly called princess palm or hurricane palm, the latter owing to its ability to withstand strong winds by easily shedding leaves.[4] It is closely related to, and resembles, palms in the genus Archontophoenix.[4] The genus is named from two Greek words meaning "net" and "seed" and the epithet is Latin for "white", the common color of the crownshaft at the top of the trunk.

Dictyosperma
Cultivated specimens on Réunion
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Arecales
Family: Arecaceae
Subfamily: Arecoideae
Tribe: Areceae
Genus: Dictyosperma
H. Wendl. & Drude[1]
Species:
D. album
Binomial name
Dictyosperma album
Synonyms[2]
  • Areca alba Bory
  • Linoma alba (Bory) O.F.Cook
  • Sublimia palmicaulis Comm. ex Mart.
  • Areca borbonica Kunth
  • Areca lactea Miq.
  • Areca propria Miq.
  • Areca purpurea Linden
  • Areca furfuracea H.Wendl.
  • Dictyosperma furfuraceum H.Wendl. & Drude
  • Areca rubra H.Wendl.
  • Dictyosperma rubrum H.Wendl. & Drude
  • Areca pisifera Lodd. ex Hook.f.
  • Dictyosperma aureum (Balf.f.) G.Nicholson
  • Areca aurea Van Houtte

Description

 
Fruit

The ringed trunks are solitary at 15 cm in diameter with a slight bulge at the base, occasionally reaching up to 12 m in height. The crownshaft is over a meter tall, swollen at the base, and covered in white wax— which has given the palm its epithet album— and small, matted brown hairs, producing a rounded leaf crown 4.5 m wide and 3 m tall. The 2.5 to 3 m leaves are borne on short 30 cm petioles; the arching leaflets are pointed at the apice, from 60 – 90 cm, dark green in color, and emerge from the rachis in a single plane.

On flowering, they produce up to six inflorescences which ring the trunk below the crownshaft, branched to one order, with white to yellow flowers, which are male and female; both pistillate and staminate flowers have three sepals and three petals, the former being smaller than the latter. The ovoid fruit ripen to purple or black in color, containing one brown, ellipsoidal seed.

Three varieties are currently recognized:

  • Dictyosperma album var. album (Bory) Scheff. - Mauritius, Réunion
  • Dictyosperma album var. aureum Balf.f. in J.G.Baker - Rodrigues Island
  • Dictyosperma album var. conjugatum H.E.Moore & J.Guého - 2 remaining specimens on Île Ronde of Mauritius (Characterised by shorter trunk and white leaf-scar)

Distribution and habitat

Living in the coastal forests of the Mascarenes, they experience warm temperatures, high humidity and regular rainfall.[5]

Asterolecanium dictyospermae

Asterolecanium dictyospermae is a species of sap sucking scale insect found only on Île Ronde on the two remaining Dictyosperma album var. conjugatum specimens. It apparently evolved on Île Ronde and became restricted to feeding upon the island's endemic variety, and due to interbreeding (between varieties) on Mauritius itself which jeopardized reproductive potential, the scale insect increased in population as a result of stress upon the host, which then threatens the existence of both host and scale insect.[6]

  •  

    Trunk base and roots

  •  

    Seedlings with bifid eophyll

  •  

    Leaf crown

  •  

    Dictyosperma album var. conjugatum

References

  1. ^ H.A. Wendland & Drude, Linnaea 39:181. 1875 Type:D. album
  2. ^ Kew World Checklist of Selected Plant Families
  3. ^ Dictyosperma album, Floridata website (accessed March 19, 2008)
  4. ^ a b Riffle, Robert L. and Craft, Paul (2003) An Encyclopedia of Cultivated Palms. Portland: Timber Press. ISBN 0-88192-558-6 / ISBN 978-0-88192-558-6
  5. ^ Uhl, Natalie W. and Dransfield, John (1987) Genera Palmarum - A classification of palms based on the work of Harold E. Moore. Lawrence, Kansas: Allen Press. ISBN 0-935868-30-5 / ISBN 978-0-935868-30-2
  6. ^ "A new species of Asterolecanium Targioni Tozzetti (Homoptera: Asterolecaniidae) on a palm in Round Island, Mauritius: a conservation puzzle". ResearchGate. Retrieved 2018-12-28.

External links

 
Wikimedia Commons has media related to Dictyosperma album.

January 31, 2023
dictyosperma, monotypic, genus, flowering, plant, palm, family, found, mascarene, islands, indian, ocean, mauritius, réunion, rodrigues, sole, species, album, widely, cultivated, tropics, been, farmed, near, extinction, native, habitat, commonly, called, princ. Dictyosperma is a monotypic genus of flowering plant in the palm family found in the Mascarene Islands in the Indian Ocean Mauritius Reunion and Rodrigues The sole species Dictyosperma album is widely cultivated in the tropics but has been farmed to near extinction in its native habitat 3 It is commonly called princess palm or hurricane palm the latter owing to its ability to withstand strong winds by easily shedding leaves 4 It is closely related to and resembles palms in the genus Archontophoenix 4 The genus is named from two Greek words meaning net and seed and the epithet is Latin for white the common color of the crownshaft at the top of the trunk DictyospermaCultivated specimens on ReunionScientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade MonocotsClade CommelinidsOrder ArecalesFamily ArecaceaeSubfamily ArecoideaeTribe AreceaeGenus DictyospermaH Wendl amp Drude 1 Species D albumBinomial nameDictyosperma album Bory H Wendl amp Drude ex Scheff Synonyms 2 Areca alba Bory Linoma alba Bory O F Cook Sublimia palmicaulis Comm ex Mart Areca borbonica Kunth Areca lactea Miq Areca propria Miq Areca purpurea Linden Areca furfuracea H Wendl Dictyosperma furfuraceum H Wendl amp Drude Areca rubra H Wendl Dictyosperma rubrum H Wendl amp Drude Areca pisifera Lodd ex Hook f Dictyosperma aureum Balf f G Nicholson Areca aurea Van Houtte Contents 1 Description 2 Distribution and habitat 3 Asterolecanium dictyospermae 4 References 5 External linksDescription Edit FruitThe ringed trunks are solitary at 15 cm in diameter with a slight bulge at the base occasionally reaching up to 12 m in height The crownshaft is over a meter tall swollen at the base and covered in white wax which has given the palm its epithet album and small matted brown hairs producing a rounded leaf crown 4 5 m wide and 3 m tall The 2 5 to 3 m leaves are borne on short 30 cm petioles the arching leaflets are pointed at the apice from 60 90 cm dark green in color and emerge from the rachis in a single plane On flowering they produce up to six inflorescences which ring the trunk below the crownshaft branched to one order with white to yellow flowers which are male and female both pistillate and staminate flowers have three sepals and three petals the former being smaller than the latter The ovoid fruit ripen to purple or black in color containing one brown ellipsoidal seed Three varieties are currently recognized Dictyosperma album var album Bory Scheff Mauritius Reunion Dictyosperma album var aureum Balf f in J G Baker Rodrigues Island Dictyosperma album var conjugatum H E Moore amp J Gueho 2 remaining specimens on Ile Ronde of Mauritius Characterised by shorter trunk and white leaf scar Distribution and habitat EditLiving in the coastal forests of the Mascarenes they experience warm temperatures high humidity and regular rainfall 5 Asterolecanium dictyospermae EditAsterolecanium dictyospermae is a species of sap sucking scale insect found only on Ile Ronde on the two remaining Dictyosperma album var conjugatum specimens It apparently evolved on Ile Ronde and became restricted to feeding upon the island s endemic variety and due to interbreeding between varieties on Mauritius itself which jeopardized reproductive potential the scale insect increased in population as a result of stress upon the host which then threatens the existence of both host and scale insect 6 Trunk base and roots Seedlings with bifid eophyll Leaf crown Dictyosperma album var conjugatumReferences Edit H A Wendland amp Drude Linnaea 39 181 1875 Type D album Kew World Checklist of Selected Plant Families Dictyosperma album Floridata website accessed March 19 2008 a b Riffle Robert L and Craft Paul 2003 An Encyclopedia of Cultivated Palms Portland Timber Press ISBN 0 88192 558 6 ISBN 978 0 88192 558 6 Uhl Natalie W and Dransfield John 1987 Genera Palmarum A classification of palms based on the work of Harold E Moore Lawrence Kansas Allen Press ISBN 0 935868 30 5 ISBN 978 0 935868 30 2 A new species of Asterolecanium Targioni Tozzetti Homoptera Asterolecaniidae on a palm in Round Island Mauritius a conservation puzzle ResearchGate Retrieved 2018 12 28 External links Edit Wikimedia Commons has media related to Dictyosperma album Dictyosperma images Dictyosperma on NPGS GRIN Dictyosperma album Germplasm Resources Information Network GRIN Agricultural Research Service ARS United States Department of Agriculture USDA GBIF Portal Fairchild Guide to Palms Dictyosperma PACSOA Dictyosperma album Floridata site Retrieved from https en wikipedia org w index php title Dictyosperma amp oldid 1123418222, wikipedia, wiki, book, books, library,

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