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Wikstroemia oahuensis

(Oahu False Ohelo (Usa))

Common Names

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Common Names in English:

Oahu False Ohelo, Oahu False Ohelo (Usa)

Description

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Genus Wikstroemia

Shrubs or subshrubs , occasionally small trees or rarely a herbaceous perennial (W. linoides), evergreen or deciduous. Leaves opposite or alternate. Inflorescence usually terminal and subterminal , rarely axillary , fascicled or solitary, spicate , racemose, umbelliform or capitate, sometimes in compound terminal panicles, often without involucre; peduncle long or short. Flowers bisexual or unisexual (Hawaii), 4- or 5-merous, subsessile or distinctly pedicellate ; pedicel articulate . Calyx tube yellow or green, less often purplish, red or white, cylindric or tubular , sometimes slightly funnel-shaped, often caducous after anthesis , sometimes persistent ; lobes 4 or 5, spreading . Petaloid appendages absent. Stamens twice as many as calyx lobes , in two series; filaments very short; anthers oblong , upper sometimes slightly exserted; connectives indistinct. Disk with 2 or 4, very rarely 1 or 5, scales , rarely joined at base by very narrow annulus, membranous. Ovary sessile, rarely shortly stipitate , usually ellipsoid , glabrous or hairy at apex, 1-loculed; style terminal, short, distinct or obscure ; stigma large, capitate, globose , or discoid . Fruit a succulent berry or rather dry. Endosperm scanty or absent; cotyledons fleshy .

About 70 species: E Asia, Malaysia, Australia, and Pacific islands with a significant minor center of diversity in Hawaii where many species are dioecious; 49 species (43 endemic) in China.

The separation of Wikstroemia from the following genus, Daphne, is problematic. Features such as leaf arrangement , inflorescence type, and flower color are all clearly paralleled within the two genera and are of no diagnostic value, although they are mentioned in most keys to these genera. In most cases, the nature of the hypogynal disk is diagnostic, but even here there are species where the interpretation of the structure of the disk is difficult. For example, the distinction between the lateral ± square disk seen in several species of Daphne and species of Wikstroemia with a single large disk scale, or species of Wikstroemia in which the disk scales are connected by a narrow annulus, or species of Daphne with very deeply divided disks makes the division seem rather arbitrary , such that there must be a good case for combining these two genera, as was done by Halda (Genus Daphne. 2001). A review of generic delimitations in the family based on molecular data would be very desirable.Yinzheng Wang & Michael G. Gilbert "Wikstroemia". in Flora of China Vol. 13 Page 213, 215, 230. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.

Physical Description

Habit: Tree , Shrub , Subshrub

Biology

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Reproduction

Duration: Perennial

Taxonomy

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Notes

Publishing author : Skottsb. Publication : in Svensk Bot. Tidskr. lviii. 183 1964 Publishing author: Skottsb. Publication: Acta Horti Gothob. xv. 400 (1944). Publishing author: Skottsb. Publication: Acta Horti Gothob. 1935, x . 129 (1936). Basionym author: (Hillebr.) Publishing author: Hochr. Publication: Candollea ii. 442 (1925). Publishing author: Skottsberg Publication: in Acta Reg. Soc. Sci. Lit. Gothoburg., Bot., 1: 70 (1972). Publishing author: Skottsb. Publication: Acta Horti Gothob. 1935, x. 127 (1936). Publishing author: Skottsb. Publication: in Svensk Bot. Tidskr. lviii. 180 1964 Publishing author: Skottsb. Publication: Acta Horti Gothob. 1935, x. 126 (1936). Publishing author: Skottsb. Publication: in Svensk Bot. Tidskr. lviii. 177 (eugenoides) 497 1964 Publishing author: A.Gray Publication: in Journ. Bot. iii. (1865) 303. Publishing author: Skottsberg Publication: in Acta Reg. Soc. Sci. Lit. Gothoburg., Bot., 1: 36 (1972). Publishing author: Skottsberg Publication: in Acta Reg. Soc. Sci. Lit. Gothoburg., Bot., 1: 27 (1972). Publishing author: Skottsberg Publication: in Acta Reg. Soc. Sci. Lit. Gothoburg., Bot., 1: 110(1972). Publishing author: Skottsberg Publication: in Acta Reg. Soc. Sci. Lit. Gothoburg., Bot., 1: 87 (1972). Publishing author: Skottsberg Publication: in Acta Reg. Soc. Sci. Lit. Gothoburg., Bot., 1: 65 (1972). Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Wikstroemia

There are approximately 201 species in this genus. Here are just 100 of them:

W. acuminata · W. alba · W. alberti · W. albiflora · W. alpestris · W. altaica · W. alternifolia · W. alternifolia var. multiflora · W. amoena · W. androsaemifolia · W. angustifolia · W. angustiloba · W. angustissima · W. anhuiensis · W. aurantiaca · W. australis · W. austrocochinchinensis · W. axillaris · W. baimashanensis · W. balansae · W. barbinervis · W. bicornuta (Alpine False Ohelo) · W. bicornuta f. glabra · W. brachyantha · W. brevipaniculata · W. buxifolia · W. calcicola · W. camelliaefolia · W. camelliifolia · W. candolleana · W. canescens · W. capitata · W. capitatoracemosa · W. capitellata · W. caudata · W. chamaedaphne · W. chamaejasme · W. chinensis · W. chuii · W. circinata · W. clementis · W. clivicola · W. cochlearifolia · W. coriacea · W. crassifolia · W. cunninghamii · W. delavayi · W. dolichantha · W. dolichantha var. effusa · W. domkeana · W. effusa · W. ellipsocarpa · W. elliptica · W. ericifolia · W. eriophylla · W. fargesii · W. farreri · W. fauriei · W. fenicis · W. flaviflora · W. floribunda · W. foetida · W. foetida var. oahuensis · W. foetida var. samoensis · W. forbesii (Molokai False Ohelo) · W. franchetii · W. fructicosa · W. fructicosa var. acutifolia · W. fruticosa · W. fruticosa var. acutifolia · W. fruticosa var. communis · W. fruticosa var. microphylla · W. fruticosa var. obovata · W. fruticosa var. sericea · W. fruticosa var. typica · W. fuminensis · W. furcata (Forest False Ohelo) · W. ganpi · W. gemmata · W. genkwa · W. glabra · W. glandulosa · W. gracilis · W. guanxianensis · W. gynopoda · W. haematoxylon · W. hainanensis · W. hanalei (Lavafield False Ohelo) · W. haoii · W. hemsleyana · W. holosericea · W. huidongensis · W. hypericifolia · W. inamoena · W. indica · W. intermedia · W. japonica · W. jiulongensis · W. johnplewsii · W. kudoi

Bibliography

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More Info

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 02, 2008:

Identifiers

Footnotes

Last Revised: 2008-11-03