Hydriastele simbiakii

From Palmpedia - Palm Grower's Guide
Jump to: navigation, search
Hydriastele (high-dree-Ah-STEL-eh)
simbiakii (seem-bee-AHK-ee)
Hs398745.JPG
Hydriastele simbiakii. A. Habit. B. Inflorescences with pistillate flowers (left) and complete triads (right). C. Portions of rachillae with pistillate flowers. All from Baker et al. 1365. All photos: W.J. Baker. PETER PETOE, CHARLIE D. HEATUBUN & WILLIAM J. BAKER Phytotaxa 370 (1) © 2018 Magnolia Press.
Scientific Classification
Genus: Hydriastele (high-dree-Ah-STEL-eh)
Species:
simbiakii (seem-bee-AHK-ee)
Synonyms
None set.
Native Continent
Oceania
Oceania.gif
Morphology
Habit: Clustering (soboliferous)
Leaf type: Pinnate
Culture
Survivability index
Common names
None.

Habitat and Distribution

Distribution:—Known only from the type locality in the Tamrau Mountains of the Bird’s Head Peninsula in western New Guinea. PETER PETOE, CHARLIE D. HEATUBUN & WILLIAM J. BAKER Phytotaxa 370 (1) © 2018 Magnolia Press.

Habitat:—Steep, rocky river margin in the flood zone about 1–2 m above fast flowing water, 400 m.
Hydriastele simbiakii. A. Habit. B. Inflorescences with pistillate flowers (left) and complete triads (right). C. Portions of rachillae with pistillate flowers. All from Baker et al. 1365. All photos: W.J. Baker. PETER PETOE, CHARLIE D. HEATUBUN & WILLIAM J. BAKER Phytotaxa 370 (1) © 2018 Magnolia Press.
PETER PETOE, CHARLIE D. HEATUBUN & WILLIAM J. BAKER Phytotaxa 370 (1) © 2018 Magnolia Press.

Description

Clustering, very slender rheophytic palm forming clumps of often numerous stems, to 5–6 m tall, bearing ca. 6–7 leaves per crown. Stem 1.5–2.5 cm in diam., pliable, shorter stems erect, longer stems leaning over river. Leaf 64–104 cm long including petiole; sheath 26–36 cm long; petiole 12–25 cm long; leaflets 14–16 per side, regularly arranged, single- or multi-fold, linear, praemorse apically. Inflorescence 13–17 cm long including 1.5–3 cm peduncle, branched to 1 order, protandrous; rachillae 3–4, scarlet; triads spirally arranged. Staminate flower 10–11 × 5–6 mm at anthesis, pink; stamens 6. Pistillate flower 4–5.5 × 2–3 mm post-anthesis, white with pinkish tinge, with free sepals and free petals with conspicuous, triangular tips. Fruit 8–12 × 4–5 mm when ripe, ellipsoid, red, with a distinct, dark, sclerotic zone encircling apical stigmatic remains (up to ca. 2 mm in diam.). Seed 7–8 × 4 mm, ellipsoid; endosperm ruminate. PETER PETOE, CHARLIE D. HEATUBUN & WILLIAM J. BAKER Phytotaxa 370 (1) © 2018 Magnolia Press.

Culture

Cold Hardiness Zone: 10b

Comments and Curiosities

Notes:—Hydriastele simbiakii is one of two strictly rheophytic species known from the genus Hydriastele, the other being H. rheophytica from the Wendlandiana group. Hydriastele simbiakii forms distinctive clumps of pliable stems, the taller ones becoming leaning and is further distinguished by displaying 14–16 regularly arranged, linear leaflets on each side of the rachis, and ruminate endosperm. Hydriastele simbiakii is most easily confused with rare forms of H. pinangoides displaying regularly pinnate leaves and similar inflorescences, but H. simbiakii is distinguished from these forms by its ecological preference and leaves with more numerous leaflets. Hydriastele simbiakii is described in more detail by Heatubun et al. (2018). PETER PETOE, CHARLIE D. HEATUBUN & WILLIAM J. BAKER Phytotaxa 370 (1) © 2018 Magnolia Press.

Uses:—Stems used for making spears.



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).

PETER PETOE, CHARLIE D. HEATUBUN & WILLIAM J. BAKER Phytotaxa 370 (1) © 2018 Magnolia Press.


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

Banner1B
Back to Palm Encyclopedia


Retrieved from "http://www.palmpedia.net/wiki/index.php5?title=Hydriastele_simbiakii&oldid=167406"