Pinanga sobolifera

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Pinanga (pih-NAHN-gah)
sobolifera (soh-boh-lih-FEHR-ah)
533850.jpg
Floribunda Nursery, Hawaii. Photo by Geoff Stein
Scientific Classification
Genus: Pinanga (pih-NAHN-gah)
Species:
sobolifera (soh-boh-lih-FEHR-ah)
Synonyms
None set.
Native Continent
Asia
Asia.gif
Morphology
Habit: Clustering
Leaf type: Pinnate
Culture
Survivability index
Common names
None.

Habitat and Distribution

Endemic to the Philippines, Luzon (Quezon Prov.). In dipterocarp forest.
Floribunda Nursery, Hawaii. Photo by Geoff Stein
Elevation; about 800 m. alt.

Description

Clustering slender unarmed pleonanthic monoecious undergrowth palm, to 2 m tall. Stem to 2.5 cm in diam., internodes to 5-10 cm long; runner shoots or stolons produced at base of stem. Crownshaft elongate, cylindrical, slightly swollen, to 35 cm long. Leaves to 5 in crown; leaf sheath about 30 cm long; leaf without sheath to 1.1 m long; petiole about 8 x 0.8 cm, channelled adaxially, rounded abaxially. Leaflets 10-13 on each side of the rachis, regularly arranged to 6-7 cm apart; basal leaflets 1-2-costate, c. 24 x 1.5 cm, sigmoidal, the apex long-acuminate; middle leaflets 2-costate, about 45-55 x 2.7 cm, ± straight, lanceolate, the apex long-acuminate; terminal leaflets to 8-costate, about 34 x 5.7 cm, joined at the base to 18 cm along the rachis. Inflorescence infrafoliar, pendulous; prophyll elliptic-ensiform, 2-keeled, about 10 x 4.5 cm; peduncle 2.7 x 0.5 cm, flattened, greenish when fresh; rachillae 8-11, borne 1 cm apart, each to 17 cm long, angular, 2 mm thick, greenish as peduncle; the subtending bract narrowly annular, apiculate in the middle part; triads borne spirally in 3 series along the rachilla. Staminate flower triangular, trigonous, asymmetrical, 5 x 3.5 mm; sepals 3, triangular, acuminate, 2 x 1 mm; petals 3, unequal, valvate, triangular or ovate-lanceolate, 4 x 3 mm; stamens about 9-12; anthers basifixed, 2 x 1 mm; filaments 0.5 mm long. Pistillate flower depressed-globose, 2 x 2.5 mm, sepals ± as long as the petals; sepals 3, free, imbricate, 1 mm high, ± narrower than the sepals and more cucullate, ciliolate along the margins; ovary shortly oblong 1.5 x 1 mm, tipped with an irregularly-lobed stigma. Fruiting perianth depressed-cupular, 2 mm high, 3 mm across, with a flat base and contracted mouth, the sepals and petals free and imbricate, subequal, glabrous; the subtending bract a very low explanate annular collar. Fruits spirally arranged along the rachilla, about 5 mm apart, ripening pinkish then purplish-black, ellipsoid-ovoid, about 1.2 x 0.8 cm, shortly beaked; epicarp drying light brown and finely striate; mesocarp thinly fibrous; seed ovoid, 1 x 0.7 cm, acute at tip, caudiculate at base; endosperm ruminate; embryo basal. (E.S. Fernando. 1994)/Palmweb. Editing by edric.

This species is similar to P. heterophylla in the clustering habit and size and in the spirally arranged flowers and fruits. It is, however, recognizable in producing runner shoots or stolons, in having more rachillae (8-11) in the inflorescence, in the seed caudiculate at the base, and in the more regularly arranged leaflets. (E.S. Fernando. 1994)/Palmweb.

Culture

Cold Hardiness Zone: 10b

Comments and Curiosities

Etymology: The specific epithet, is derived from the Lain word for clustering (Producing soboles); soboliferous


External Links

References

Phonetic spelling of Latin names by edric.

Special thanks to Geoff Stein, (Palmbob) for his hundreds of photos.

Special thanks to Palmweb.org, Dr. John Dransfield, Dr. Bill Baker & team, for their volumes of information and photos.

Glossary of Palm Terms; Based on the glossary in Dransfield, J., N.W. Uhl, C.B. Asmussen-Lange, W.J. Baker, M.M. Harley & C.E. Lewis. 2008. Genera Palmarum - Evolution and Classification of the Palms. Royal Botanic Gardens, Kew. All images copyright of the artists and photographers (see images for credits).

Fernando, E.S. 1994. New Species of Pinanga (Palmae : Arecoideae) from Luzon Island, Philippines. Kew Bulletin, Vol. 49, No. 4, pp. 775-784.


Many Special Thanks to Ed Vaile for his long hours of tireless editing and numerous contributions.

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