Cypripedium arietinum (Ram's Head Lady's Slipper)

Overview

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Vulnerable

Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in English:

Ram's Head Lady's Slipper, Lady's-slipper, Ram's Head Lady's-Slipper, Ram's-Head, Ram's-Head Lady's-Slipper, Rams Head Lady Slipper Orchid

Common Names in French:

Cyprip

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 Cypripedium

Herbs, perennial . Roots closely to widely spaced along rhizome, slender, fleshy ; rhizomes short to elongate . Stems leafy or scapose . Leaves alternate, in single radical pair, or subopposite near midpoint of stem, ascending to spreading , plicate , bases sheathing stem. Inflorescences terminal , solitary; flowers solitary or 2-several in lax racemose spike; bracts large, foliaceous . Flowers resupinate, showy; sepals distinct or lateral sepals usually connate proximal to lip forming synsepal; petals entire; lip inflated, slipper- or sac-shaped, with adaxial orifice ; pollinaria absent; loose granular pollen in 2 lateral anthers, dorsal anther a large subapical staminode; stigma free , 2-3-lobed. Fruits capsules, ellipsoid to oblong-ellipsoid.

Species ca. 45: primarily temperate Eurasia and North America, ranging from arctic to subtropics in East Asia and Cordilleran North America and Central America.[2]

Physical Description

Species Cypripedium arietinum

Plants erect , 10-35 cm. Leaves 3-4, along middle portion of stem, spiraled to alternate, ascending to spreading ; blade narrowly elliptic to ovate-lanceolate or oblong , 5-11 × 1.3-3.5 cm. Flowers usually solitary (rarely 2 in forma biflorum P. M. Brown) ; sepals green with reddish brown markings; dorsal sepal broadly elliptic to ovate-lanceolate, 15-25 × 5-10 mm; lateral sepals distinct , 12-20 × 1.5-4 mm; petals somewhat spreading, same color as sepals, somewhat spirally twisted, linear- to linear-lanceolate, 11-24 × 1-2 mm; lip white with green apex, usually with extensive reddish reticulations often merging toward apex, adaxially swollen near middle, 10-16 mm, apex abruptly deflected downward, orifice basal, 7-12 mm; staminode suborbicular . 2n = 20. [source]

Habit: Forb/herb

Flowers: Bloom Period: May, June. • Flower Color: pink

Size/Age/Growth

Size: 6-12" tall.

Habitat

Dry to moist open coniferous and mixed forests , coniferous-forested fens , beach thickets; mostly 0--400 m [3].

Biology

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Reproduction

Duration: Perennial

Growth

Culture: Space 9-12" apart.

Soil: Minimum pH: 5.1 • Maximum pH: 6.5

Sunlight: Sun Exposure: Light Shade.

Temperature: Cold Hardiness: 2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b. (map)

Taxonomy

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Domain: Eukaryota () - Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Plantae () - Haeckel, 1866 - Plants
  - Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
    - Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
      - Subphylum: Euphyllophytina ()
        Infraphylum: Radiatopses () - Kenrick & Crane, 1997
        Class: Spermatopsida () - Brongniart, 1843
        Subclass: Liliidae () - Takhtajan, 1967
        Superorder: Lilianae () - Takhtajan, 1967
        Order: Asparagales () - Bromhead, 1838
        Family: Orchidaceae () - A.L. de Jussieu, 1789, nom. cons. - Orchid Family
        Subfamily: Cypripedioideae ()
        Genus: Cypripedium () - C. Linnaeus, 1753 - Lady's-slipper, moccasin-flower [Greek Kypris, Aphrodite, and Latin pes, foot, perhaps an orthographic error for Greek pedilon, slipper]
        Specific epithet: arietinum - R.Br.
        Botanical name: - Cypripedium arietinum R.Br.

Synonyms

Criosanthes arietina (Ait. F.) House

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 Cypripedium

ZipcodeZoo has pages for 187 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

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Notes

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Contributors

Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 30, 2012.
"Cypripedium arietinum". in Flora of North America Vol. 26 Page 499, 501. Published by Oxford University Press. Online at EFloras.org.
Global Biodiversity Information Facility. Accessed February 28, 2008. http://www.gbif.org Mediated distribution data from 2 providers.
Ruggiero M., Gordon D., Bailly N., Kirk P., Nicolson D. (2011). The Catalogue of Life Taxonomic Classification, Edition 2, Part A. In: Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D., eds). DVD; Species 2000: Reading, UK.
The Royal Horticultural Society Horticultural Database, available here.
USDA, NRCS. 2005. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
World Checklist of Selected Plant Families. Release date: November 27, 2009

Data Sources

Accessed through GBIF Data Portal February 28, 2008:

Canadian Museum of Nature: Canadian Museum of Nature Herbarium
USDA PLANTS: USDA PLANTS Database

Identifiers

Biodiversity Heritage Library NamebankID: 2663034
Catalogue of Life Accepted Name Code: Kew-53897
Globally Unique Identifier: urn:lsid:ipni.org:names:625598-1
Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 43540
Natural Heritage Network Species Identifier: PMORC0Q020
U.S.D.A. Plant Symbol: CYAR5
Zipcode Zoo Species Identifier: 33064

Footnotes

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]
Charles J. Sheviak "Cypripedium". in Flora of North America Vol. 26 Page 494, 495, 496, 497, 498, 499. Oxford University Press. Online at EFloras.org. [back]
"Cypripedium arietinum". in Flora of North America Vol. 26 Page 499, 501. Oxford University Press. Online at EFloras.org. [back]

Cypripedium arietinum

Overview

Interesting Facts

Common Names

Description

Family Orchidaceae

Genus Cypripedium

Physical Description

Species Cypripedium arietinum

Size/Age/Growth

Habitat

Biology

Reproduction

Growth

Taxonomy

Synonyms

Notes

Similar Species

Members of the genus Cypripedium

More Info

Further Reading

Notes

Contributors

Data Sources

Identifiers

Footnotes