Dinema

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Dinema
Dinema polybulbon.jpg
Dinema polybulbon
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Tribe: Epidendreae
Subtribe: Laeliinae
Genus: Dinema
Lindl.
Species:
D. polybulbon
Binomial name
Dinema polybulbon
(Sw.) Lindl.
Synonyms [1]
  • Epidendrum polybulbonSw.
  • Encyclia polybulbon(Sw.) Dressler
  • Bulbophyllum occidentaleSpreng.
  • Epidendrum polybulbon var. luteoalbumMiethe
  • Epidendrum cubincolaBorhidi
  • Dinema cubincola(Borhidi) H.Dietr.

Dinema is a genus of orchids. It is represented by a single currently accepted species, Dinema polybulbon, native to Mexico, Central America, and the Caribbean. [2]

Contents

Description

They are epiphytes or lithophytes; with pseudobulbs 10 mm long and 6 mm wide, spaced 1–1.5 cm apart on the creeping rhizome, slightly compressed, yellowish-green, apically bi-foliate. The leaves are 15 mm long and 8 mm wide, obtuse, emarginate, shiny green. The inflorescence is uniflora or rarely with 2 flowers, terminal, the flowers 15 mm in diameter, the sepals and the petals are yellowish-brown, the lip is white to yellowish-white with the yellow nail, the column is white with purple spots; the sepals 9 mm long and 2 mm wide, shortly acuminate; petals 9 mm long and 1.5 mm wide; the simple lip, 9 mm long and 6 mm wide, unguiculate, adnate to the base of the spine, with the disc dilated and with undulated edges, thickened nail 2 mm wide; the column is 5 mm long, with 2 conspicuous extensions at the apex, the anther is terminal, pollinia 4; ovary 15 mm long, pedicellate. The fruits are ellipsoid capsules [3]

Distribution

It is found in Mexico, Belize, El Salvador, Guatemala, Honduras, Nicaragua, Cuba and Jamaica. Uncommon species in habitat, found in humid mixed forests, at an altitude of 1000–1400 meters; it blooms in November, and bears fruit in August.

Taxonomy

Dinema polybulbon from Curtis's Botanical Magazine vol. 70 (N.S. 17) pl. 4067 Dinema polybulbon - Curtis' 70 (N.S. 17) pl. 4067 (1844).jpg
Dinema polybulbon from Curtis's Botanical Magazine vol. 70 (N.S. 17) pl. 4067

This species can be recognized by the small size, the relatively large solitary flowers, the simple white to yellowish-white lip, and the cornicle-shaped extensions of the column. It is a monotypic genus.

Dinema polybulbon was described by (Sw.) Lindl. and published in The Genera and Species of Orchidaceous Plants 111. 1831

Synonyms

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References

  1. ↑ Kew World Checklist of Selected Plant Families
  2. ↑ la Croix, Isobyl (2008). The New Encyclopedia of Orchids: 1500 Species in Cultivation. Portland, Oregon: Timber Press. p. 166. ISBN   978-0881928761.
  3. ↑ "Dinema polybulbon". Tropicos.org. Missouri Botanical Garden: Flora de Nicaragua. Retrieved 21 May 2010.
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