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Cylindrolobus

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Cylindrolobus
Cylindrolobus sp. (Vietnam)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Tribe: Podochileae
Subtribe: Eriinae
Genus: Cylindrolobus
Blume
Type species
Cylindrolobus compressus (Blume) Brieger
(Blume) Brieger
Synonyms[1]
  • Ceratium Blume

Cylindrolobus is a genus of orchids with about 80 species that grow in New Guinea, Wallacea, Southeast Asia, southern China, and India.[1]

Description

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These herbs are epiphytic, but also rarely terrestrial.[2] The elongate stems are slender and usually not pseudobulbous (though some species do possess a few terminal internodes, sometimes slightly swollen), with leaves along the entire length, except for some nodes at the base where persistent leaf sheaths have formed, or with some leaves towards the end/apex. The leathery leaves are alternate, conduplicate, and their shape can be linear-oblanceolate, or either narrowly elliptic or ovate. The leaves articulate to a sheathing base that tightly envelopes the stem. The usually short or slender inflorescences occur either laterally on many nodes or come from the terminal node of the stem, and have only 1 or 2-3 flowers. The peduncle is usually very much reduced. The few floral bracts are spirally arranged (in a few species they are conspicuous, brightly coloured and fleshy). The flowers are mostly coloured white or cream, though some species have ochre-yellow flowers. Flowers are medium-sized, glabrous (smooth) or with sparse stellate-hairs on the abaxial surface to the sepals. Pedicel and ovary are glabrous. Sepals vary, dorsally they are free, often recurved, while the lateral sepals are oblique at the base, forming with column foot a blunt oblique mentum. The petals are free and small than the sepals, their curved lip is three-lobed, hinged to a column foot, and adorned with a papillose, subglobose callus and either papillose keels or laminate keels. The lateral lobes are erect, and enclose the column. In most species the mid-lobe is smaller than lateral-lobes. The short column has a foot shorter than or about as long as the column proper. There are 8 rectangular pollinia, arranged in pair-series, a large and a small in each pair, with the posterior 4 are much smaller.

The few-flowered, glabrous axillary inflorescence is a diagnostic trait amongst sympodial taxa in the Epidendroideae subfamily p.p.[3]

Distribution

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The species of Cylindrolobus grow from New Guinea to Tropical Asia to south Zhōngguó/China. Countries and regions that members of the taxa grow in include: New Guinea, Lesser Sunda Islands, Maluku, Sulawesi, Philippines, Borneo, Java, Sumatra, Malaya, Thailand, Cambodia, Vietnam, Laos, Myanmar, Assam, East Himalaya, India, Tibet, and South Central China.

Species

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Further reading

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  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Eria.]
  • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Eria.]
  • Ng, Y.P. & al. (2018). Phylogenetics and systematics of Eria and related genera (Orchidaceae: Podochileae) Botanical Journal of the Linnean Society 186: 179-201.
  • Pridgeon, A.M., Cribb, P.J., Chase, M.C. & Rasmussen, F.N. (2006). Epidendroideae (Part One) Genera Orchidacearum 4: 1-672. Oxford University Press, New York, Oxford. [Cited as Callostylis.]
  • Wu, Z. & Hong, D. (eds.) (2009). Flora of China 25: 1-570. Missouri Botanical Garden Press, St. Louis.

References

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  1. ^ a b "Cylindrolobus Blume". Plants of the World Online (POWO). Royal Botanic Gardens, Kew. Retrieved 6 February 2021.
  2. ^ Chen, Xinqi; Luo, Yi-Bo; Wood, Jeffrey J. "FOC: Family List: FOC Vol. 25: Orchidaceae: 123. Cylindrolobus Blume, Fl. Javae Praef. vi. 1828". Flora of China. eFloras.org. Retrieved 6 February 2021.
  3. ^ Chen, Xinqi. "FOC: Family List: Vol. 25: 1. Orchidaceae: Key 5: Subfam. Epidendroideae p.p.: sympodial taxa". Flora of China. eFloras.org. Retrieved 6 February 2021.
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Data related to Cylindrolobus at Wikispecies

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