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Schiedea adamantis

H.St.John (1970)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-CoreEudicot Order: Caryophyllales Family: Caryophyllaceae Genus: Schiedea

Description

Key Characters:

Growth Form: Gynodioecious shrubs, 3–8 dm tall.

Stems: Stems often swollen at the nodes, terete (cylindrical), 4–angled or –ridged, erect or strongly ascending, glabrous, internodes 0.5–4.1 cm long, green to greenish purple, terete (cylindrical), 4–angled or –ridged, lateral branches of primary stems usually elongating several or more nodes below the inflorescence.

Roots: Fibrous root system.

Leaves: Leaves simple. Opposite. Blades elliptic to elliptic–oblanceolate or oblanceolate, 1.5–3 (–6) cm long, 0.4–1.4 (–2.2) cm wide. Apex acute to acuminate. Base leaf bases often connate around the stem, base cuneate. Surfaces yellowish green; blades weakly coriaceous. Margins entire, slightly thickened and weakly revolute. Only the midvein evident. Petioles 0.3–0.8 cm long. Stipules absent.

Flowers: Flowers in inflorescence terminal, laterally contracted, somewhat congested; the hermaphroditic inflorescences 3.1–12.3 cm long and with 22–170 flowers, less congested and broader than the pistillate inflorescences, these 2.3–11.4 cm long and with 30–140 flowers; bracts of central axis 2–15 mm long, those of branches and flowers 1–1.8 mm long, green to purple, linear to subulate. Flowers bisexual (perfect) or pistillate, (4–)5-merous. Calyx of hermaphroditic flowers with sepals 3.4–4.5 mm long, narrowly ovate, broadly and shallowly navicular, oriented at 60° to 90° angle to the pedicel, green or tinged purple toward the apex, opaque, reflexed and convex at the base, producing a small transverse bulge, glabrous, margins scarious, sometimes somewhat irregularly undulate, entire, glabrous, apex obtuse. Pistillate flowers: sepals 2.6–3.2 mm long, narrowly ovate, green or yellowish green, pale yellow at the base, opaque, venation pale and translucent, reflexed and convex at the base, producing a small transverse bulge, broadly navicular, oriented at 60° to 100° angle to the pedicel, margins scarious and often irregularly undulate, entire or with 1–several lacerations, glabrous, apex often inrolled, obtuse. Corolla (petals) absent. Stamens 10 (hermaphroditic flowers), the filaments slightly dimorphic, the antisepalous whorl 4.9–5.7 mm long, the alternate whorl 4.5–5.3 mm long; anthers 0.8–1.2 mm long, yellow. Pistillate flowers: Stamens 10, vestigial; filaments unequal, the antisepalous whorl 0.5–1.75 mm long, the alternate whorl 0.4–0.65 mm long; anthers 0.2–0.4 mm long, white, not producing pollen. Ovary superior; styles 3–4 (–5) (pistillate flowers), or 3–4 (hermaphroditic flowers).

Fruit: Capsules 3.5–5 mm long; narrowly ovoid. Seeds relatively few; 0.8–0.9 mm long; reniform; compressed; the surface papillose; papillae of the margins larger than those of the faces; perisperm starchy; hard or rarely soft; true endosperm absent.

Ploidy: 2n = 52*–56*; 60*

Habitat: Known only from steep; dry slopes in largely alien shrubland.

Elevation Range: ca. 125 m.

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

O'ahu Endemic

Dispersal Agents


Pollinators

Notes

  • 125 m, O'ahu
  • Description digitized by Mercedez
  • Description digitized from the Manual of the Flowering Plants of Hawaii
  • Schiedea adamantis, known from only one population of perhaps 60-65 individuals, is currently in danger of extinction and is federally listed under the Endangered Species Act

Bibliography

Name Published In: Pacific Sci. 24: 247 (1970)

Other References

Wagner et al. 1990:510 (O); Wagner, Weller & Sakai 2005:144 (KEY, DESCR)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Associated vegetation: Schinus terebinthifolius, Ficus microcarpa, Leucaena leucocephala, Osteomeles anthyllidifolia Preserved_Specimen Kroessig, T. 20170406 Oahu BISH 2017-04-06
2 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Cultivated at the University of California, Irvine green house Preserved_Specimen Wagner, W.L. 6846 Oahu BISH 1998-02-11
3 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Originally ~8 mature plants, 2 seedlings fround on rocky dry, west facing cliff face in mostly shade. Gulch dominated by Schinus terebinthefolius, Aleurites moluccana, Oplismenus hirtellus; some Eragrostis variabilis, Sida fallax on cliff. Preserved_Specimen Ching-Harbin, S. 2021070201 Oahu BISH 2021-07-02
4 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Dry, grassy steep with Lipochaeta, Euphorbia, Antirrhinum, and Dodonaea Preserved_Specimen Ozaki, E.T. 1448 Oahu BISH 1955-04-08
5 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Material originally received from Terrance Noguchi, Oahu, collected from inside Diamond Head crater, Oahu, 12 May 1999. Preserved_Specimen Orr, D. Oahu BISH 2011-04-22
6 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Dry slope Preserved_Specimen Lamoureux, C.H. 567 Oahu BISH 1955-05-08
7 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Welton, P. 782 Oahu BISH 1991-11-23
8 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Cultivated in greenhouse, but originally from a rocky ledge in Kului gulch in a dry forest gully. Growing with Erythina sandwicensis, Urochloa maxima, Sida fallax, Euphorbia celastroides amplectens, Hibiscus arnottianus, Psydrax odorata, Psidium cattleianum, Schinus, and others. Preserved_Specimen Thomas, M.K. 928 Oahu BISH 2024-12-23
9 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details from the type colony. Preserved_Specimen Takeuchi, W.N. 1919 Oahu BISH 1985-01-13
10 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Growing with Leucaena, Eragrostis, Sida, Lantana, Lipochaeta, Antirrhinum and stachys, in an exposed area with shallow soil Preserved_Specimen Nagata, K.M. 1823 Oahu BISH 1979-02-20
11 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details in open exposed area: habitat rather dry. Also a colony found from the rim (only on the outside slopes) at 124 m. to 116. m. and extending about 3 m. side. Population count on 23.xi.1978 amounted to 67 plants. Recent drought conditions may have decimated some of the colony. One one other plant was found outside this colony. Preserved_Specimen Obata, J.K. 409 Oahu BISH 1978-11-23
12 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Cultivated at the University of California, Irvine green house Preserved_Specimen Wagner, W.L. 6845 Oahu BISH 1998-02-11
13 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Herbst, D.R. 5612 Oahu BISH 1976-01-10
14 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Herbst, D.R. 5612 Oahu BISH 1976-01-10
15 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Lamoureux, C.H. 567 BISH
16 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Takeuchi, W.N. 1920 Oahu BISH 1985-01-13
17 Schiedea adamantis Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Weller, S.G. Oahu BISH 1984-01-01
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