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Schiedea mannii

H.St.John (1970)

This name is accepted

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

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Description

Key Characters:

Growth Form: Subdioecious shrubs.

Stems: Stems often swollen at the nodes, terete (cylindrical), 4–angled or –ridged, weakly erect 1.5–2.5 (–10) dm long, the primary stems branched, weakly erect to ascending, internodes 0.2–0.7 (–1.5) cm long, pale purple, becoming yellowish green sporadically tinged purple in the distal parts of the plant, glabrate proximally, minutely puberulent on the distal stems and inflorescence.

Roots: Fibrous root system.

Leaves: Leaves simple. Opposite. Blades linear or linear–elliptic or linear–oblanceolate, inconspicuously falcate, 2.5–4 (–5) cm long, 0.15–0.4 (–0.5) cm wide. Apex acute. Base leaf bases often connate around the stem, base attenuate. Surfaces glabrous, recurved, thick and membranous. Margins inconspicuously thickened. Only the midvein evident, the midvein slightly excentric. Sessile. Stipules absent.

Flowers: Flowers in inflorescence terminal, with 22–131 flowers, (2–) 4–9 cm long, laterally contracted, lateral branches short, the branches and pedicels ascending to spreading, puberulent with minute glandular hairs 0.02–0.04 mm long; bracts green becoming white toward the base, sometime tinged with purple, filiform to linear–subulate, those of central axis 1.5–10 mm long, those of branches and flowers 1–1.5 mm long. hermaphroditic flowers occurring occasionally intermixed in staminate inflorescences, numbers varying with site and moisture, similar to staminate flowers except ovary and styles functioning. Populations subdioeceious. Calyx of staminate flowers with sepals subequal, 2.2–2.8 mm long, narrowly ovate, yellowish green, often tinged purple toward the apex, opaque, reflexed and convex at the base, producing a conspicuous transverse bulge in the lower ⅓, the middle part concave, broadly and shallowly navicular to nearly flat in the distal ⅓, oriented at 60° to 80° angle to the pedicel, glabrous, margins broadly and conspicuously scarious in the upper half, apex rounded, and often weakly lacerate. Pistillate flowers: sepals subequal, 2–2.25 mm long, narrowly ovate, yellowish green, yellow toward the base, opaque, reflexed and convex at the base, producing a small transverse bulge, the middle part concave, curved upward and broadly navicular to nearly flat in the distal ⅓, often irregularly inrolled toward the apex, oriented at 80° to 100° angle to the pedicel, moderately puberulent, the hairs 0.05––0.1 mm long, margins broadly and conspicuously scarious, sometimes ciliate in distal ½, apex obtuse. Corolla (petals) absent. Staminate flowers: Stamens 10 (–11), the filaments subequal, 4.9–5 mm long; anthers 0.4–0.5 mm long, pale yellow. Pistillate flowers: Stamens 10 (–11), vestigial, the filaments subequal, 2–3 mm long; anthers ca. 0.3 mm long, yellowish white, not producing pollen. Ovary superior (pistillate flowers), 1-celled; ovule placentation free-central; styles 3. Staminate flowers: styles 3, weakly elongating but non–functional.

Fruit: Capsules 2.5–3 mm long; narrowly ovoid. Seeds 0.6–0.8 mm long; reniform; compressed; the surface transversely rugose; perisperm starchy; hard or rarely soft; true endosperm absent.

Ploidy: 2n = possibly 56*

Habitat: In scattered sites on open; sunny ridges in diverse mesic forest.

Elevation Range: 400–820 m.

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

O'ahu Endemic

Dispersal Agents


Pollinators

Notes

  • Description digitized by Mercedez
  • Description digitized from the Manual of the Flowering Plants of Hawaii
  • Occurring in scattered sites on open, sunny ridges in diverse mesic forest, 400-800 m, known only from Pu'uhdpapa, Pu'ukawiwi, Mflkua Valley, Mdkua-Kea'au Ridge ('Ohikilolo), and Kamaile'unu Ridge, Wai- 'anae Mountains, O' ahu
  • Schiedea mannii is closely related to S. ligustrina and differs primarily in having narrower leaves and sparsely puberulent inflorescences. It also occurs in much more exposed habitats and perhaps should be treated as an ecologically extreme subspecies of S. ligustrina.

Bibliography

Name Published In: Pacific Sci. 24: 252 (1970)

Other References

Wagner et al. 1990:516 (O); Wagner, Weller & Sakai 2005:130 (KEY, DESCR)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Schiedea mannii Makua-Keaau Ridge (Ohikilolo), Waianae Range. Off ridge top on the Makua side, on vertical cliff face just off ridge top; about 1482 m. from the ocean dry, rocky, exposed Preserved_Specimen Obata, J.K. Oahu BISH 1975-01-19
2 Schiedea mannii Upper Makaha-Waianae Kai ridge, Waianae Rg. on crest of Makaha-Waianae Kai ridge, towards Mt. Kaala from the two large pinnacled rocks exposed and open with few exotic grasses surrounding the colony of about 12 plants. growing either on almost vertical faces or dry ridge top. Preserved_Specimen Obata, J.K. 341 Oahu BISH 1978-02-19
3 Schiedea mannii Kamaileunu near Pinnacle Rock Preserved_Specimen Takeuchi, W.N. 2111 Oahu BISH 1985-03-31
4 Schiedea mannii Waianae kai Preserved_Specimen Tate, B. 5 Oahu BISH 1987-05-01
5 Schiedea mannii Kahanahaiki Preserved_Specimen Herbst, D.R. Oahu BISH 1976-11-07
6 Schiedea mannii Kamaileunu ridge Preserved_Specimen Takeuchi, W.N. 2113 Oahu BISH 1985-03-31
7 Schiedea mannii Wai`anae Mts., ridge separating Wai`anae Kai and Makaha valleys. Preserved_Specimen Weller, K. Oahu BISH 1985-01-01
8 Schiedea mannii Preserved_Specimen St.John, H. 24793 BISH
9 Schiedea mannii Waianae Mts., Waianae Valley, Kamaileunu ridge, near Puu Kawiwi. In Acacia koa-Metrosideros lowland mesic forest with Alyxia, Canthium, Nestegis, Chamaesyce, Aleurites, Psidium guajava, Lantana, Antidesma, Pleomele, Alectryon, Dubautia sherffiana, Hibiscus Preserved_Specimen Perlman, S. 5859 Oahu BISH 1987-05-19
10 Schiedea mannii Upper Makaha-Waianae Kai ridge, Waianae Rg. on crest of Makaha-Waianae Kai ridge, towards Mt. Kaala from the two large pinnacled rocks exposed and open with few exotic grasses surrounding the colony of about 12 plants. growing either on almost vertical faces or dry ridge top. Preserved_Specimen Obata, J.K. 341 Oahu BISH 1978-02-19
11 Schiedea mannii Waianae Range, on ridge top near summit of Puu Hapapa, on ridge radiating towards Kolekole Pass on exposed ridge top, two specimens Preserved_Specimen Obata, J.K. 369 Oahu BISH 1978-05-21
12 Schiedea mannii Waianae Mts., Makua-Ohikilolo ridge Face of basalt cliff. Preserved_Specimen St.John, H. 24793 Oahu BISH 1952-02-24
13 Schiedea mannii Waianae Mts, Waianae Kai, on Ridge Trail near Pinnacle Rocks jsut below Rocks on Mt Kaala side With shrubs, Ohia, Dodonaea, Dubautia sherffiana, Schiedea hookeri, Bidens torta, Santalum plants scattered in area only few here flowering. Preserved_Specimen Perlman, S. 5483 Oahu BISH 1987-03-24
14 Schiedea mannii Waianae Kai Forest Reserve, Kamaileunu Ridge near Puu Kepauala Growing on rock out-cropping on arid, exposed crest of ridge.+ Preserved_Specimen Herbst, D.R. 5764 Oahu BISH 1976-03-14
15 Schiedea mannii Upper Makua Valley, Waianae Mts, on crest of spur into Makua Valley, ca 50 yards S of cabin at Peacock Flats In rocky, exposed situation w/grasses & scrub Lantana. Preserved_Specimen Nagata, K.M. 1151 Oahu BISH 1973-05-27
16 Schiedea mannii On rocky ledges at crest of Kamaileunu Ridge, just N of major peak N of Puu Kawiwi, Waianae Mts In company w/ Bidens, Plectranthus & Dodonaea. Preserved_Specimen Nagata, K.M. 1104 Oahu BISH 1972-12-28
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