Holcoglossum wangii Christenson

국표에 없다.

Holcoglossum (Holc.) is a genus of orchids, in the family Orchidaceae. It is native to China and Southeast Asia.

Description

All species of this genus are perennial epi- or lithophytes and are characterized by a short monopodial shoot axis with terete or cross-sectionally triangular leaves. The upper side forms a groove with the folded edges of the leaves. The leaves are tapered and not notched at the leaf tip. The root tips of living roots show a reddish color in all species of the genus, and some species also have red-spotted foliage. The flowering stem emerges laterally from the shoot axis and forms two or more flowers, which are far apart and form a raceme or inflorescence.

The flowers are white and wide open. The lip is three-lobed. The lateral lobes are erect and dotted adaxially. The central part is spread out over a large area and is parallel to the gynostemium. The lip is shaped to allow potential pollinators to depress the middle lip. The flowers have an elongated spur, which is strongly reduced in the subgenus Brachycentron. The gynostemium has a large scar area. The stamen contains two separate pollina. The stipes connecting the pollina and the adhesive disc (Viscidium) bend in the middle when removed from the rostellum. The rostellum is deeply incised. The number of chromosomes is 2n = 38 in almost all species. Holcoglossum tsii has 76 chromosomes in the diploid chromosome set (2n = 76).

Self-pollination has been observed in Holcoglossum amesianum, in which the pollina moves independently to the fertile stigma in the column.

Distribution

The distribution area of the genus extends over southwest China, Laos, Vietnam, Thailand and Malaysia. However, most of the species come from the Yunnan province in the south-west of the People's Republic of China. Holcoglossum quasipinifolium and Holcoglossum pumilum are endemic to Taiwan. The species live at higher altitudes between 1200 m and 3300 m and thus prefer a cool to cold habitat.

Holcoglossum - Wikipedia

• Lindleyana 13: 123 (1998)

• This name is reported by Orchidaceae as an accepted name in the genus Holcoglossum (family Orchidaceae).

  The record derives from WCSP which reports it as an accepted name (record 99646)

 

Cite taxon page as 'WFO (2023): Holcoglossum wangii Christenson. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000982805. Accessed on: 31 May 2023'

General Information

Stems ca. 2 cm. Leaves several, nearly basal; blade subterete, 30-58 cm × ca. 4 mm, fleshy. Inflorescence ca. 5 cm, 3-5-flowered; rachis purple; floral bracts ovate, ca. 2 mm. Flowers white, lateral lobes of lip yellow, spotted with purple; pedicel and ovary ca. 3.3 cm. Dorsal sepal oblong, ca. 20 × 7 mm, obtuse; lateral sepals oblique, elliptic, ca. 23 × 10 mm, base clawed and ± twisted, apex obtuse. Petals elliptic-oblong, ca. 28 × 10 mm, base twisted and clawed, apex obtuse; lip spurred, 3-lobed; lateral lobes erect, unequally bilobulate; mid-lobe oblong-elliptic, ca. 18 × 15 mm, with 3-5 basal lamellae; spur cylindric, 8-10 mm. Column ca. 6 mm. Fl. Oct-Dec. 2n = 38*.

• Provided by: [A].Flora of China @ efloras.org

Holcoglossum wangii Christenson (worldfloraonline.org)

 

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