Pinanga humilis

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Pinanga (pih-NAHN-gah)
humilis (hoo-MIHL-iss)
Pc587024498980.JPG
Showing a spicate inflorescence pushing through the persistent leaf sheath and distichously arranged flowers. Photo by Dr. A.J. Henderson.
Scientific Classification
Genus: Pinanga (pih-NAHN-gah)
Species:
humilis (hoo-MIHL-iss)
Synonyms
None set.
Native Continent
Asia
Asia.gif
Morphology
Habit: Clustering
Leaf type: Pinnate
Culture
Survivability index
Common names
Cay nui

Habitat and Distribution

Vietnam. In lowland forest on steep slopes at 350 m elevation.

Showing a spicate inflorescence pushing through the persistent leaf sheath and distichously arranged flowers. Photo by Dr. A.J. Henderson.

Description

Stems clustered, caespitose; forming small clumps, to 0.9 m tall, 1 cm in diameter, green with reddishbrown scales. Leaves 5; sheaths open, not forming crownshafts, 7-13 cm long, covered with reddish-brown scales; ocreas 1-2.5 cm long, early deciduous; petioles 59-78 cm long, green; rachis 38-39 cm long; pinnae 5-7 per side of rachis, linear, contracted at the bases, middle pinna 32-33 cm long, 2 cm wide at the middle, apical pinna 15.5-21 cm long, 2 cm wide at the middle, lobed; veins scarcely raised adaxially. Inflorescences interfoliar, pushing through the persistent, disintegrating, subtending leaf sheaths, erect; peduncles 0.5-0.8 cm long, 0.3 cm wide; prophylls 3-4.5 cm long; rachis absent; rachillae 1-3, 4-4.5 cm long, rectangular in cross-section, glabrous; triads distichously arranged; staminate flowers 6.5 mm long; sepals forming a 3-lobed, flat, membranous calyx 1.5 mm long; petals 3, 6 mm long, triangular, fleshy, acute; stamens 9-13; pistillate flowers 2.5 mm long; calyx 2.5 mm long with 3, free, imbricate, ciliate, nonacuminate sepals; corolla similar to the calyx; ovary 2.5 mm long. Fruits 1.7 cm long, 0.5 cm in diameter, ellipsoid, color unknown; endosperm ruminate. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52 (2): 63-69)/Palmweb. Editing by edric.

Pinanga humilis differs from all previously described species of Pinanga from Vietnam by its leaf sheaths which do not form a distinct crownshaft and inflorescences which are not infrafoliar. In this it is similar to P. cattienensis, differing in its distichously (versus spirally) arranged triads; 38-39 cm long (versus 90-95 cm long) rachis; and 5-7 (versus 9-13) pinnae per side of the rachis. (Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69)/Palmweb.

Culture

Cold Hardiness Zone: 10b

Comments and Curiosities



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).

Henderson, A., Khac Ban, N. and Quoc Dung, N. 2008. New Species of Pinanga (Palmae) from Vietnam. Palms 52(2): 63-69


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

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