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Prosthechea vespa

(Prosthechea vespa Orchid)

Common Names

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Common Names in English:

Prosthechea vespa Orchid

Description

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Family Orchidaceae

Herbs or rarely vines , perennial , rarely annual , strongly mycotrophic, epiphytic, terrestrial , lithophytic, or rarely aquatic or subterranean , usually green and photosynthetic, some without chlorophyll and saprophytic . Roots subterranean or aerial , tuberoid or stolonoid, usually with spongy , multilayered velamen. Stems erect or pendent or modified into creeping rhizomes, simple or sympodially or monopodially branched, delicate to stout, or thickened as corms or pseudobulbs , or greatly reduced, sometimes proliferous (especially diverse in sympodial orchids) . Leaves solitary, several, or reduced to scales , basal or cauline, alternate, distichous, or sometimes opposite or whorled , either convolute or duplicate , simple, sessile or petiolate ; stipules absent; blade articulate or not, plicate or conduplicate , cylindric , triangular, or laterally flattened, margins entire. Inflorescences terminal or lateral , racemes , spikes, panicles, or rarely cymose , erect or variously pendent, 1 many-flowered, lax or dense, flowering successively or simultaneously. Flowers bisexual [rarely unisexual ], epigynous , resupinate or not, pedicellate or sessile, 3-merous, usually bilaterally symmetric [rarely nearly radially symmetric], with abscission layer between pedicel and peduncle, rarely between ovary and perianth or ovary and pedicel; perianth of 6 tepals in 2 whorls, all petaloid or sepals sometimes greener and more foliaceous in texture ; sepals alike or not, lateral sepals often connate (forming synsepal), or all 3 sepals variously connate and/or adnate or distinct and/or free ; petals 3, median petal modified as lip, commonly larger or differing in form and color, lateral petals commonly but not always similar to sepals; nectaries of various sorts; extrafloral nectaries sometimes present on pedicels, bracts, or leaf sheaths ; stamens usually 1 2( 3, if 3 the 3d modified into sterile staminode), all on side opposite lip, fully or partially adnate to style, forming column; pollen grains in monads or tetrads , usually in 2 8 pollinia, sometimes subdivided into small packets, rarely granular , sometimes pollinia with caudicles and/or stipes; gynoecium 3-carpellate, connate, forming compound , inferior, 1- or 3-locular ovary; style variously adnate to filaments ; stigmas usually 3-lobed, concave to convex , part of median stigma lobe modified into rostellum , often separating anther from fertile portions of stigma, commonly preventing or in some cases facilitating self-pollination ; ovules numerous , anatropous , minute. Fruits capsules, opening (dehiscing) by longitudinal slits, rarely fleshy and indehiscent berries . Seeds numerous (millions in some species), minute; endosperm absent.

Genera ca. 800, species 22,000 35,000 (701 genera, 208 species in the flora ; 1 genus, 6 species introduced) : worldwide except Antarctica, most diverse in tropical forests .

The overall count for orchid genera in the flora includes Spathoglottis plicata Blume, which was recently reported from Palm Beach County, Florida. The plants , known locally since 1982, are apparently widely naturalized in old shellpits. The number of species in the flora includes one newly recognized species in Habenaria that is morphologically described, but not fully treated here. Orchidaceae are by far the largest and most diverse monocot family and rank among the largest families of flowering plants. An accurate account of the number of genera and species has eluded orchid scientists, and species counts published in the last 20 years range from 15,000 to 35,000. New species are continually being described. In addition, numerous natural and artificial hybrids exist.

Although orchids are important in horticulture , most of the plants traded in the national and international market belong to a small number of species and their hybrids in only a few genera; the majority of orchids are not commonly cultivated. Few orchids are economically important outside the horticultural trade: the fruits of several species of Vanilla are the source of the spice vanilla, and the dry roots of some species of Dactylorhiza, Eulophia, and Orchis are made into salep, a flour consumed in northern Africa, the Middle East (especially Turkey), and Asia. Some species are locally used for medicinal purposes; the mucilage from pseudobulbs of several species is sometimes used as glue; and in the Far East the stems of some species of Dendrobium are split into strips used to weave handicrafts. A few orchids have been found to cause contact dermatitis (e.g. , Cypripedium reginae) .

Orchids range vegetatively from Lilliputian plants a few millimeters long (Bulbophyllum Thouars and Platystele Schlechter) to gigantic clusters weighing several hundred kilograms (Grammatophyllum Blume) to some as much as 13.4 meters in height (Sobralia altissima D. E. Bennett & Christenson, a recently described species from Peru) . Likewise, flowers vary in size from less than 1 mm and barely visible to the naked eye (Platystele Garay), to 15 20 cm diameter (some Paphiopedilum Pfitzer, Phragmipedium Rolfe, and Cattleya Lindley spp. ), and ultimately to 76 cm [Phragmipedium caudatum (Lindley) Rolfe]. Weight can vary from a fraction of a gram (many Pleurothallus R. Brown spp.) to nearly 100 grams (Coryanthes Hooker spp.) . Their fragrances vary from delightful (Cattleya Lindley) to repulsive and unbearable (in some species of Bulbophyllum Thouars) . The plants colonize habitats ranging from some of the driest and hottest places on earth to the wettest and coolest, literally occurring from polar regions to the equator. Within the monocots, the most important diagnostic features of Orchidaceae are reduction of adaxial stamens, fusion of the remaining stamens to the gynoecium forming the column, aggregation of pollen into compact pollinia (present elsewhere only in the dicots , in Asclepiadaceae), differentiation of the median petal into the lip, a sometimes complex organ, and the exceedingly small size of the seed, which lacks endosperm. Among other distinguishing characteristics: pollen in the pollinia is usually not available as a nutrient-source (Cleistes Richard ex Lindley being a notable exception), and the often complex interaction with pollinators culminates in the phenomenon of pseudocopulation in several genera (e.g., Ophrys Linnaeus, Caladenia R. Brown sect. Calonema, Drakaea Lindley) . In the latter process , the flower mimics the appearance , the smell, and often the movements of a female wasp, attracting a male of a suitable species that tries to copulate with the flower. It usually only succeeds in becoming attached to a pollinium , which will then be transferred if the male tries to copulate with another flower.

Roots of orchids may be covered with velamen, spongy layers derived from the epidermis ; fleshy thickenings of roots are tuberoids (tubers being restricted to stems) . Stems may be swollen or thickened, underground corms or aerial pseudobulbs. Flowers are often resupinate: the lip (modified median petal) is  lowermost,  usually as a result of the pedicel being twisted or bent in its development by 180°. Pedicellate ovary, usually used in reference to length , refers to the combined pedicel and ovary. Flowers are not always borne on pedicels; when they are, it is sometimes difficult to distinguish between a slender ovary and the pedicel. Consequently, because of their slender ovaries, flowers of a  racemose spike  appear to be pedicellate even though they are sessile, while a  spicate raceme  has pedicels so short that they appear to be absent. Orchid flowers often have a modified median sepal, the dorsal sepal. Sepals coalescing at their tips form a synsepal. The middle portion of the upper (adaxial) face of the lip is the disc: it may be a thickened callus and may bear hairs , papillae, or other ornamentation. In orchids the style, stigmas, filaments, and one or more anthers are united to form a column; appendages projecting laterally from the stigma are column wings; the lip may be attached to the protrusion at the base of the column to form a column foot ; lateral sepals that are also attached to the foot form a mentum (chin) . In most orchids the column bears a single anther at its apex; the clinandrium is the cavity within which the anther is borne or embedded . Pollen is borne in discrete masses (pollinia) . Genera with mealy (sectile) pollinia may have pollinia within the anther tapering into a caudicle (stalk ), which is attached to a sticky viscidium . Those with waxy pollinia have pollinia attached to one or two stipes (of stigmatic origin and formed outside the anther), which in turn are attached to a viscidium. The various aggregations of pollinia, caudicles, stipes, and viscidium form a pollinarium , the pollination unit carried by pollinators. The median stigma lobe may have a slender extension or little beak (rostellum), which aids in gluing the pollinarium to the pollinator.[1]

Genus Prosthechea

Herbs, epiphytic. Roots fleshy , glabrous . Stems aggregate or spaced, erect , forming flattened or fusiform pseudobulbs . Leaves 1-3, apical, sessile, articulate ; blade ovate to lanceolate, thinly leathery. Inflorescences apical, paniculate racemes , flowers simultaneous or successive, produced only once, pedunculate or sessile. Flowers resupinate or not; sepals subequal ; petals sometimes much narrower; lip appressed to column, adnate to proximal 1/2, with callus; pollinia 4, obovoid , laterally compressed , subequal; caudicles 4 in 2 pairs; column not winged , apically 3- or 5-toothed; rostellum semiorbiculate, entire, covered abaxially with viscous substance. Fruits capsules, ellipsoid to ovoid , prominently 3-winged, 1-locular.

Species ca. 100: neotropical regions.

Prosthechea has been variously treated as Epidendrum, Encyclia, Hormidium, and Anacheilium, and variously circumscribed to include the cockle-shell orchids and others. It has been recently reestablished by W. E. Higgins (1997[1998]) to include not only the cockle-shell species but also their less showy Mexican relatives. Recent molecular data (C. van den Berg et al. 2000) support this status.

The Florida species of Prosthechea were segregated (J. K . Small 1933) into four genera: Encyclia, Hormidium, Anacheilium, and Epicladium. Most later authors recognize only Epidendrum or Epidendrum and Encyclia. The proposed reestablishment of Anacheilium and Hormidium (G. F. Pabst et al. 1981; R. P. Sauleda et al. 1984), was based mainly on Brazilian species and did not take Mexican species into consideration. The Mexican species have been dealt with as Encyclia subg. Osmophytum sections Osmophytum and Hormidium (R. L. Dressler and G. E. Pollard 1976).

Prosthechea is recognized by the presence of a spathe at the base of the inflorescence, lip adnate to proximal half of column, 3-winged capsule, and presence of glycoside crystals. Encyclia has no spathe, the column is usually adnate at base of column, the capsule is fusiform, not winged, and no glycoside crystals are present. In Epidendrum the lip is adnate to the column throughout, and the rostellum is slit; stems are usually canelike.[2]

Habitat

Typically found in the intertidal zone at the water's edge at a mean distance from sea level of 300.30 meters (985.24 feet).[3]

Biome: Coastal.

Taxonomy

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Synonyms

Epidendrum crassilabium

Notes

Registrant name : This is a natural hybrid

Originator name: This is a natural hybrid

Similar Species

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Members of the genus Prosthechea

ZipcodeZoo has pages for 47 species, subspecies, varieties, forms, and cultivars in this genus:

P. abbreviata (Prosthechea Abbreviata Orchid) · P. aemula (Prosthechea Aemula Orchid) · P. baculus (Prosthechea Baculus Orchid) · P. Beacon Fire (Prosthechea Beacon Fire Orchid) · P. Bob Freeman (Prosthechea Bob Freeman Orchid) · P. boothiana (Prosthechea Boothiana Orchid) · P. brassavolae (Prosthechea Brassavolae Orchid) · P. campylostalix (Prosthechea Campylostalix Orchid) · P. chacaoensis (Prosthechea Chacaoensis Orchid) · P. citrina (Prosthechea Citrina Orchid) · P. cochleata (Prosthechea) · P. Cream Puff (Prosthechea Cream Puff Orchid) · P. Edith Arakawa (Prosthechea Edith Arakawa Orchid) · P. Edward O'dell (Prosthechea Edward O'dell Orchid) · P. Ed Moore (Prosthechea Ed Moore Orchid) · P. Elfin (Prosthechea Elfin Orchid) · P. Exotic's Leprechaun (Prosthechea Exotic's Leprechaun Orchid) · P. Expectation (Prosthechea Expectation Orchid) · P. Fragracarpum (Prosthechea Fragracarpum Orchid) · P. fragrans (Prosthechea Fragrans Orchid) · P. garciana (Prosthechea Garciana Orchid) · P. Goldstern (Prosthechea Goldstern Orchid) · P. Green Hornet (Prosthechea Green Hornet Orchid) · P. Hilda (Prosthechea Hilda Orchid) · P. ionocentra (Prosthechea Ionocentra Orchid) · P. ionophlebia (Prosthechea Ionophlebia Orchid) · P. James Burkhalter (Prosthechea James Burkhalter Orchid) · P. Kathleen Elizabeth (Prosthechea Kathleen Elizabeth Orchid) · P. Lemon Lime (Prosthechea Lemon Lime Orchid) · P. livida (Prosthechea Livida Orchid) · P. L'étrange (Prosthechea L'étrange Orchid) · P. mariae (Prosthechea Mariae Orchid) · P. Marina (Prosthechea Marina Orchid) · P. Martina (Prosthechea Martina Orchid) · P. Orchidglade (Prosthechea Orchidglade Orchid) · P. Peter Hunt (Prosthechea Peter Hunt Orchid) · P. prismatocarpa (Prosthechea Prismatocarpa Orchid) · P. pygmaea (Dwarf Butterfly Orchid) · P. Radia-Cochlea (Prosthechea Radia-Cochlea Orchid) · P. radiata (Prosthechea Radiata Orchid) · P. Rêves des bois (Prosthechea Rêves Des Bois Orchid) · P. Steredenn Gwen (Prosthechea Steredenn Gwen Orchid) · P. Sunburst (Prosthechea Sunburst Orchid) · P. Tony Millet (Prosthechea Tony Millet Orchid) · P. tripunctata (Prosthechea Tripunctata Orchid) · P. vespa (Prosthechea Vespa Orchid) · P. vitellina (Manuelitos)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal March 15, 2008:

Identifiers

Footnotes

  1. Gustavo A. Romero-González, Germán Carnevali Fernández-Concha, Robert L. Dressler, Lawrence K. Magrath & George W. Argus "Orchidaceae". in Flora of North America Vol. 26 Page 15, 16, 17, 26, 27, 490, 491, 617. Oxford University Press. Online at EFloras.org. [back]
  2. Eric Hágsater "Prosthechea". in Flora of North America Vol. 26 Page 495, 608, 613. Oxford University Press. Online at EFloras.org. [back]
  3. Standard Deviation = 855.970 based on 126 observations. Terrestrial altitude and ocean depth information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 2014-05-07