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Polyscias lydgatei

(Hillebr.) Lowry & G.M.Plunkett (2010)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Asterids Order: Apiales Family: Araliaceae Genus: Polyscias

Description

Key Characters:

Growth Form: Small tree, 7–10 m tall quite glabrous, secretory canals present in most parts.

Stems:

Roots:

Leaves: Leaves compound. Alternate. Blades 34–40 (50) cm long, 5–11–foliate, blades of leaflets elliptic–oblong or at times narrowly obovate, 6–10 cm. long and 2–4.5 cm. wide; petiolules delicate, 8–23 mm. long. Leaflet apices rounded. Base rounded to attenuate Leaflets thin-chartaceous. Margins entire and slightly revolute Petioles 8–9 cm. long. Stipules absent or rudimentary.

Flowers: Flowers in terminal (often appearing lateral) inflorescence twice–umbellate from a short, common rhachis of about 6 mm.; peduncles 9–12, slender, <2 mm wide, 8–10 cm long, bearing terminal sperical umbellets of about 26–47 flowers. Flowers bisexual (perfect), actinomorphic; pedicels slender < 1 mm wide, 15–30 mm long. Calyx broad–obconical, 5 mm. tall, with undulating border. Corolla of 6 petals, yellow to yellow green, cohering at their tips, 6 mm. long. Stamens 12 or 18 (two to three times as many as petals) in a single whorl, about 4 mm. long; anthers straight or recurved. Ovary inferior, (3)–4 celled; stigmas 4, sessile. Nectary disk flat to conical, yellow.

Fruit: Drupes 1 cm long; 0.5–0.7 cm wide; globose to ovoid with stylopodium forming small (1 mm) beak; fruit wall becoming longitudinally ridged when dry Seeds 1 per pyrene; globose; 4–5 mm long; embryo small.

Ploidy:

Habitat: Dry to mesic areas; open woods; ridges; degraded msesic forest.

Elevation Range: 335–378 m

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

O'ahu Endemic

Dispersal Agents


Pollinators

Notes

  • Description digitized by Timothy Gallaher/curated by Pumehana Imada. The description uses data from The Manual Flowering of Flowering Plants of Hawaii, Sherff (1955) and Motley (2005).
  • This species was founded by Hillebrand upon a plant attributed to Lydgate and which had been collected at Wailupe, southeastern-most Oahu. The type was in the Berlin Herbarium and perished with the destruction of that herbarium in World War II. I have bef

Bibliography

Name Published In: Pl. Divers. Evol. 128: 74 (2010)

Other References

Motley, T. J. (2005). Tetraplasandra lydgatei (Araliaceae): Taxonomic Recognition of a Rare, Endemic Species from O‘ahu, Hawaiian Islands1. Pacific science, 59(1), 105-110.

Wagner et al. 1990:235 (Syn. Tetraplasandra lydgatei = T. oahuensis); Motley 2005:106 (RESURRECT/O, KEY, DESCR); Lowry & Plunkett 2010:74 (COMBNOV, Syn. T. lydgatei = P. lydgatei)

Sherff, E. E. (1955). Revision of the Hawaiian members of the genus Tetraplasandra A. Gray. Chicago Natural Histor. Museum.

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Rather dry locality Preserved_Specimen Forbes, C.N. 1942 Oahu BISH 1914-10-15
2 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details E facing; w Psidium etc. Preserved_Specimen Obata, J.K. Oahu BISH 1992-09-27
3 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen MacDaniels, L.H. 466 Oahu BISH 1927-01-27
4 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Forbes, C.N. 2511 Oahu BISH 1917-05-04
5 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Chung, D. Oahu BISH 2000-07-30
6 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen MacDaniels, L.H. 466 Oahu BISH 1927-01-27
7 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Forbes, C.N. 2461 Oahu BISH 1917-04-11
8 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details E facing; w Psidium etc. Preserved_Specimen Obata, J.K. Oahu BISH 1992-09-27
9 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Freely branching 15 ft. tall tree in degraded mesic forest on windswept side ridge. Preserved_Specimen Chung, D. Oahu BISH 2000-09-23
10 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details dry open woods Preserved_Specimen Degener, O. 6099 Oahu BISH 1932-06-04
11 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Along ridgetop, growing under larger Psidium sp. (waiawi); in drier steep habitat. Preserved_Specimen Obata, J.K. Oahu BISH 1992-08-02
12 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details With Psidium cattleianum, Sideroxylon polynesicum, Schinus terebinthifolia, Euphorbia celastroides. Preserved_Specimen Thomas, M.K. 27 Oahu BISH 2019-09-01
13 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details Rather dry locality Preserved_Specimen Forbes, C.N. 1942 Oahu BISH 1914-10-15
14 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details With Psidium cattleianum, Sideroxylon polynesicum, Schinus terebinthifolia, Euphorbia celastroides. Preserved_Specimen Thomas, M.K. 27 Oahu BISH 2019-09-01
15 Polyscias lydgatei Locality redacted. Contact Bishop Museum Botany Department for details In degraded mesic forest on windswept side ridge. Preserved_Specimen Chung, D. Oahu BISH 2000-06-28
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