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Araucaria rulei

(Rule Araucaria)

Overview

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Endangered

Threat status

Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in English:

Rule Araucaria

Common Names in French:

Araucaria De Nouvelle Calédonie

Common Names in Portuguese:

Araucária De Nova Caledônia

Description

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Family Araucariaceae

Trees evergreen , dioecious or monoecious, with relatively large pith in trunk and resin in cortex. Leaves spirally arranged or decussate, sessile, decurrent. Cones unisexual . Pollen cones axillary or terminal on branchlets , solitary or clustered; microsporophylls numerous , spirally arranged, sessile; microsporangia 4-20, external, suspended, arranged in 2 rows , filiform ; pollen sacs split longitudinally; pollen nonsaccate. Seed cones solitary, terminal on branchlets, maturing in 2nd or 3rd year; bracts numerous, spirally arranged; ovulate scales degenerate or ligulate , connate with bracts on 1 side, each with 1 ovule at base abaxially; ovules connate with ovulate scales or with bracts (when ovulate scales degenerate) ; bracts of mature cones deciduous, flattened, woody or thickly leathery, bearing 1 seed in basal part (if developed), sometimes adnate with ligulate seed scales in center of adaxial surface, apex triangular or caudate . Seeds connate with bracts or detached, flattened, winged or not. 2n = 26.

Three genera and 41 species: Indonesia, Malaysia, Papua New Guinea, Philippines; Australia, New Zealand, SW Pacific Islands, South America; two genera and four species (all introduced ) in China.[1]

Genus Araucaria

Trees monoecious, occasionally dioecious; branches whorled or almost so; winter buds small. Leaves spirally arranged , needlelike to broadly ovate or triangular, varied in shape and size even on same tree. Pollen cones axillary or terminal on branchlets , cylindric , ovoid , or ellipsoid ; microsporophylls densely arranged. Seed cones erect , ellipsoid, or ovoid to subglobose; ovulate scales ligulate ; bracts of mature cones large, woody, distal part thickened, distal margin sharply and transversely ridged , apex reflexed or upcurved, pointed ; seed scales adnate with bracts in basal, seed-bearing part, detached in apical part, sometimes thickened and exposed. Seeds connate with bracts, sometimes with 2 apparent lateral wings formed from bract. Cotyledons usually 2, occasionally 4. Germination hypogeal or epigeal.

Nineteen species: Papua New Guinea; Australia (including Norfolk Island), New Caledonia, South America; three species (introduced ) in China.[2]

Physical Description

Habit: Evergreen .

Size/Age/Growth

Size: 12-15' tall.

Habitat

Ecology: Restricted to serpentine, often nickel bearing soils, in 'maquis-minier' shrubland. Trees are usually scattered and rarely form dense stands. [3].

List of Habitats :

Biology

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Growth

Culture: Space 15-20' apart.

Sunlight: Sun Exposure: Sun to Partial Shade.

Temperature: Cold Hardiness: 9b, 10a, 10b, 11. (map)

Taxonomy

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Synonyms

Araucaria rulei var. compacta (Carrière) F. M. Bailey • Araucaria rulei var. polymorpha (Carrière) F. M. Bailey • Eutacta muelleri var. microphylla Carrière • Eutacta rulei (F. Muell.) Carrière • Eutacta rulei var. compacta Carrière • Eutacta rulei var. polymorpha Carrière

Notes

Name Status: Accepted Name .

Comment: Conservation status: EN (C1 ), Habit: Tree

Last scrutiny: 5-Jun-2008

Similar Species

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Members of the genus Araucaria

ZipcodeZoo has pages for 10 species, subspecies, varieties, forms, and cultivars in this genus:

A. angustifolia (Brazilian Monkey Puzzle Tree) · A. araucana (Monkey Puzzle) · A. bidwillii (Bunya Bunya) · A. columnaris (Cook Pine) · A. cunninghamii (Hoop Pine) · A. heterophylla (Norfolk Island Pine) · A. heterophylla 'Monia' (Majestic Beauty ® Star Pine) · A. hunsteinii (Klinkii Pine) · A. rulei (Rule Araucaria) · A. subulata (Narrow-Leaved Araucaria)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 16, 2007:

Identifiers

Footnotes

  1. Liguo Fu, Nan Li & Robert R. Mill "Araucariaceae". in Flora of China Vol. 4 Page 9. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. Liguo Fu, Nan Li & Robert R. Mill "Araucaria". in Flora of China Vol. 4 Page 9. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  3. Thomas, P. 2010. Araucaria rulei. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 30 January 2012. [back]
Last Revised: 7/21/2012