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No key was found for the requested taxon, but it has only one child: Oncidium ensatum. Showing where it is keyed below.

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Key to terrestrial orchids: Key to Orchidaceae

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1 Leaves absent at flowering, or with a solitary leaf with a purplish undersurface withering at about the time of flowering.
..2 Flowers with a spur.
....3 Spur shortly obtuse, lip partially tubular; [s. FL]
....3 Spur long and slender, lip not partially tubular; widespread in our region, south in FL to ne. FL]
..2 Flowers without a spur.
......4 Flowers white, the lip, sepals, and petals all predominantly white.
........5 Lip white with a single central green stripe; leaves often fugacious
........5 Lip white, centrally yellow to greenish-white, occasionally with multiple green veins (as in S. praecox and S. sylvatica); leaves present, absent, or withering (fugacious) at flowering
......4 Flowers pink, greenish, yellowish, or purplish, the lip sometimes white or marked with white, the sepals and petals colored.
..........6 Lip strongly bearded.
............ 7 Flower solitary; [Mountains of SC, NC, and VA northwards]
............ 7 Flowers not solitary (inflorescence a raceme); [Coastal Plain of SC southwards]
..........6 Lip not bearded.
............ ..8 Lip with 2 fleshy keels near the base; pollinia 4; plants holomycotrophic (without chlorophyll) and never with leaves
............ ..8 Lip with 3-7 keels near the base or extending most of the length of the lip; pollinia 4 or 8; plants either holomycotrophic (without chlorophyll) and never with leaves, or with a plicate winter leaf withering shortly before flowering.
............ ....9 Plants with a plicate winter leaf withering shortly before flowering (the withered remnant usually detectable); veins of the petals and sepals not strikingly different in color than the intervein areas; lip with 3 ridges; pollinia 4
............ ....9 Plants never with leaves, holomycotrophic (without chlorophyll); veins of the petals and sepals strikingly different in color than the intervein areas; lip with 5-7 ridges; pollinia 8
1 Leaves present at flowering (Cleistesiopsis with a foliaceous bract at the summit of the stem).
............ ......10 Plants with evident, above-ground pseudobulbs, sometimes enclosed by sheaths.
............ ........11 Leaf bases tightly sheathing the stems, often petiolate.
............ ..........12 Lip broadest near its base; inflorescence typically a spicate raceme (prematurely umbellate in M. spicata); leaves to 10 cm long
............ ..........12 Lip broadest near its apex; inflorescence typically a more open or lax raceme; leaves to 30 cm long.
............ ............ 13 Leaves 3-7, membranaceous, plicate; anthers green
............ ............ 13 Leaves 2, thickish, conduplicate; anthers yellow
............ ........11 Leaf bases not conspicuously clasping the stems (or if clasping, loosely so).
............ ............ ..14 Flowers predominantly yellow, pseudobulbs > 8 (-100) cm long.
............ ............ ....15 Flowers without brown spots; pseudobulbs typically 10-30 (-100) cm long
............ ............ ....15 Flowers with brown spots; pseudobulbs typically 8-15 cm long
............ ............ ..14 Flowers not predominantly yellow, pseudobulbs < 8 cm long.
............ ............ ......16 Leaves not plicate, with conspicuous dark green mottling
............ ............ ......16 Leaves plicate, without conspicuous dark green mottling.
............ ............ ........17 Lip conspicuously bearded (or if not bearded, conspicuously keeled and with brownish-maroon veins extending to margins of lip)
............ ............ ........17 Lip not conspicuously bearded.
............ ............ ..........18 Perianth brown (white on lower surface); lip tubular
............ ............ ..........18 Perianth pink or purple; lip not tubular.
............ ............ ............ 19 Lip with 5-7 conspicuous yellow-white keels
............ ............ ............ 19 Lip without 5-7 conspicuous yellow-white keels
............ ......10 Plants without above-ground pseudobulbs (either absent or subterranean).
............ ............ ............ ........23 Leaf long petiolate, lanceolate-elliptic; lateral sepals conspicuously spreading with long acuminate apices; [s. FL]
............ ............ ............ ........23 Leaf not long petiolate, orbicular; lateral sepals reflexed or slightly spreading without long acuminate apices, rather, typically blunt or rounded; [widespread; NC and TN northward]
............ ............ ............ ............ 25 Flowers relatively large, primarily pink, purple, or white; flowers arranged in loosely arranged racemes
............ ............ ............ ............ ..26 Lip below (resupinate); flowers white, often cleistogamous; lip white with purple margins, with keels
............ ............ ............ ............ ..26 Lip above (not resupinate); flowers purple or pink (rarely white), chasmagomous; lip with yellow fringes (beard)
............ ............ ............ ............ 25 Flowers relatively small, whitish; flowers arranged in densely (and sometimes also spirally) arranged spikes.
............ ............ ............ ............ ....27 Dorsal sepal connivent with petals forming hood over columnn; lip sagittate-auriculate
............ ............ ............ ............ ....27 Dorsal sepals not forming connivent hood with petals, or if rarely so, then lip pandurate (as in S. romanzoffianum)
............ ............ ............ ............ ......28 Flowers in spikes or racemes, 5-many, reddish, yellowish, or greenish.
............ ............ ............ ............ ......28 Flower solitary (-4), pink (rarely nearly white); [subfamily Vanilloideae; tribe Pogonieae].
............ ............ ............ ............ ........29 Sepals brown to purple, linear or narrowly oblanceolate, 3-6.5 cm long, about 5 mm wide; leaf coriaceous
............ ............ ............ ............ ........29 Sepals pink (rarely white), elliptic or oblanceolate, 1.3-2.7 cm long, 3-11 mm wide; leaf herbaceous
............ ............ ............ ............ ..........30 Lip inflated, pouch-like or slipper-like, 2-6 cm long
............ ............ ............ ............ ..........30 Lip not inflated, or if so, then 0.3-1.1 cm long.
............ ............ ............ ............ ............ ....33 Lip arcuate, with purple-brown marginal speckles; leaf sheaths inflated-tubular
............ ............ ............ ............ ............ ....33 Lip saccate, without purple-brown marginal spots; leaf sheaths tight and not inflated-tubular.
............ ............ ............ ............ ............ ......34 Leaves typically many (3-14); 4-20 cm long; lip variously colored without conspicuous yellow disc; [widespread]
............ ............ ............ ............ ............ ......34 Leaves typically fewer (2-5); 4-4.5 cm long; lip primarily white with conspicuous yellow disc; [s. FL]
............ ............ ............ ............ ............ ..32 Leaves smooth, often creased at the midrib, but not plicate; lip not saccate.
............ ............ ............ ............ ............ ........35 Leaves whorled, terminating the stem; [subfamily Vanilloideae; tribe Pogonieae]
............ ............ ............ ............ ............ ........35 Leaves alternate or opposite, not terminating the stem.
............ ............ ............ ............ ............ ..........36 Leaves (2-) 3-many, alternate, variously distributed on the stem.
............ ............ ............ ............ ............ ............ 37 Plant with aerial roots throughout stem; lip orange-red, deeply 3 to 4 lobed and marginally fimbriate; [subfamily Epidendroideae]
............ ............ ............ ............ ............ ............ 37 Plant without aerial roots throughout stem; lip variously colored, if orange then not deeply 3 to 4 lobed.
............ ............ ............ ............ ............ ............ ....39 Distal portion of lip not uniformly yellow; leaves ovate, 0.4-2.0 cm long
............ ............ ............ ............ ............ ............ ....39 Distal portion of lip uniformly yellow; leaves linear or narrowly lanceolate, 1-8 cm long
............ ............ ............ ............ ............ ............ ..38 Lip with a spur; leaves linear, lanceolate, or narrowly elliptic, 5-40 cm long (at least the larger > 5 cm long, except in Aspidogyne, with lanceolate to ovate leaves 1.5-6.5 cm long).
............ ............ ............ ............ ............ ............ ......40 Leaves 1.5-6.5 cm long, with inflated tubular sheaths; plants from creeping rhizomes
............ ............ ............ ............ ............ ............ ......40 Leaves 5-40 cm long, sessile; plants from fleshy or fusiform roots.
............ ............ ............ ............ ............ ............ ........41 Lip divided into 3 linear divisions, the divisions not further divided, fringed, or eroded
............ ............ ............ ............ ............ ............ ........41 Lip not divided into 3 divisions, or divided into 3 divisions but the divisions not linear.
............ ............ ............ ............ ............ 31 Leaves basal (sometimes with bladeless sheaths upward on the stem).
............ ............ ............ ............ ............ ............ ............ ..44 Lip oriented downward (resupinate); flowers greenish, purplish-brown, maroon or yellowish.
............ ............ ............ ............ ............ ............ ............ 43 Leaves smooth, often creased at the midrib, but not plicate.
............ ............ ............ ............ ............ ............ ............ ........47 Leaves long petiolate, not basally sheating stems; sepals longer (to 30 mm), narrowly lanceolate
............ ............ ............ ............ ............ ............ ............ ........47 Leaves not long petiolate, basally sheating stems; sepals shorter, variously shaped
............ ............ ............ ............ ............ ............ ............ ..........48 Flowers not bicolored, the lip, petals, and sepals similarly colored; leaves 2-5
............ ............ ............ ............ ............ ............ ............ ............ ....51 Inflorescence a raceme; lip with pink-purple coloration along margin; flowers larger, not tightly spiraling
............ ............ ............ ............ ............ ............ ............ ............ ....51 Inflorescence a spike; lip without pink/purple coloration along margin; flowers smaller, often spiraling or tightly assembled
............ ............ ............ ............ ............ ............ ............ ............ ..50 Leaf blades more-or-less horizontally oriented, flat against the ground or 1-2 cm above it.
............ ............ ............ ............ ............ ............ ............ ............ ......52 Flowers orange-red (except rarely light green as in S. lanceolata forma albidaviridis)
............ ............ ............ ............ ............ ............ ............ ............ ......52 Flowers never strongly orange-red, instead white, yellowish, greenish, or brown (including coppery).
............ ............ ............ ............ ............ ............ ............ ............ ..........54 Lip without green spots (sometimes with green coloration but not green-spotted).
............ ............ ............ ............ ............ ............ ............ ............ ............ 55 Large flowers distinctly pedicellate on racemes; lip short-caudate, 4.5-7 mm long; petals obliquely triangular
............ ............ ............ ............ ............ ............ ............ ............ ............ ..56 Leaves with prominent white or pale green variegation on midrib and/or veins; [subtribe Goodyerinae]
............ ............ ............ ............ ............ ............ ............ ............ ............ ......58 Lip and perianth segments each with a single central green stripe; leaves more or less fugacious
............ ............ ............ ............ ............ ............ ............ ............ ............ ......58 Lip and perianth without a central green stripe; occasionally with multiple green veins on the lip; leaf often persistent.
............ ............ ............ ............ ............ ............ ............ ............ ............ ........59 Flowers white, often also marked or veined with yellow or green; [widespread in our region]
............ ............ ............ ............ ............ ............ ............ ............ ............ ..........60 Lip canaliculate (grooved longitudinally), without conspicuous yellow throat; flowers greenish-brown or coppery

Key to epiphytic orchids: Key to Orchidaceae

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1 Plant a vine, the main stems long and climbing up the trunks or stems of other woody plants; stems succulent
1 Plant not a vine, instead a cespitose, trailing, rhizomatous, or hanging herb; stems not succulent.
..2 Leaves equitant in a fan-like array; plants growing as a twig-epiphyte primarily on Ceratiola ericoides and perhaps occasionally scrub oaks; [limited to xeric scrub habitat in Martin and Palm Beach counties, FL].
....3 Flowers primarily white with yellow, brown, and purple coloration; without dark streaks extending down the middle lobe of the lip.
....3 Flowers bright pink to dark purple; with 5 darker purple streaks (the middle partially yellow) extending down the middle lobe of the lip.
..2 Leaves not equitant or fan-like; plants not twig epiphytes in xeric scrub; [in a wide variety of cypress swamps, mesic hardwood hammocks, sloughs, strands, or otherwise non-xeric, swampy habitats throughout; occasionally in crevices of grit outcrops (e.g. Epidendrum conopseum)].
......4 Plant without pseudobulbs or basally thickened stems, instead only with fleshy, glabrous, fibrous, or chlorophyllous roots
........5 Plants with fleshy, glabrous, or fibrous roots, not evidently photosynthetic or velamentous; plants with 1 to many leaves.
..........6 Stems with numerous alternate, cauline leaves; leaf blades ovate to elliptic or lanceolate, fleshy-leathery
..........6 Stems with a single leaf, erect and sessile or subsessile; leaf blades elliptic to oblanceolate, leathery.
............ 7 Inflorescences few flowered racemes (occasionally several-flowered), 0.8-2 cm long; flowers dark red-purple, glabrous, typically congested near apex of inflorescence; stems 1.5-5 (-8) cm long with 4-8 closely appressed, ciliate sheaths; leaf blades < 2.5 cm long.
............ 7 Inflorescences many-flowered racemes, (6-)10-25 (-28) cm long; flowers pubescent, translucent yellow, often spaced throughout the inflorescence; stems 10-25 cm long with 2-3 loose, inflated sheaths; leaf blades > 10 cm.
........5 Plants with chlorophyllous roots, evidently photosynthetic, velamentous (with thick spongy root epidermis); plants with leaves absent, early deciduous, or otherwise inconspicuous.
............ ..8 Inflorescence a densely arranged, 2-ranked, erect or pendent spike with more than 12 flowers; flowers sessile at the node; floral bracts cordate; spur sacccate
............ ..8 Inflorescence a moderate to loosely flowered raceme with 1-10 flowers (less than 12), floral bracts lanceolate; spur arcuate or scrotiform.
............ ....9 Chlorophyllous roots with prominent white marks; perianth segments (sepals/petals) > 20 mm, white to cream-colored; middle lobe of lip with subquadrangular isthmus, between 2 twisting caudate lobes 45-70 mm long; arcuate spurs to 17 cm long; roots 3-5 mm wide.
............ ....9 Chlorophyllous roots without white marks; perianth segments (sepals/petals) < 4 mm long; lip ovate, lacking long caudate lobes, pale yellow; scrotiform spurs to 4 mm long; roots < 1 mm wide
......4 Plant with pseudobulbs (thickened stems), pseudobulbs sometimes inconspicuous, reduced, or appearing as basally thickened stems.
............ ......10 Pseudobulbs inconspicuous or not prominent (stems appearing basally thickened or pseudobulb reduced); reduced pseudobulbs often concealed by longer, scarious, leafy bracts.
............ ........11 Plants with a single, solitary, thick (coriaceous) elliptic leaf; flowers with prominent blotches
............ ........11 Plants with multiple leaves per stem (2-6); leaves linear-lanceolate or oblong-elliptic; flowers without prominent blotches.
............ ..........12 Inflorescence erect-arching, not strongly secund and not curved upward at apex; flowers lavender or violet to white with dark rose/purple veins extending to distal portions of lip; typically flowering from Mar-Apr, towards the end of the s. FL dry season; leaves 3-13 cm long
............ ..........12 Inflorescence a strongly secund terminal panicle (a simple raceme in smaller plants), often curved upward apically; flowers yellow-pale green; typically flowering from Aug-Dec., towards the end of the wet season and beginning of the s. FL dry season; leaves 3.5-20 cm long
............ ......10 Pseudobulbs conspicuous or prominent, strongly to slightly compressed; ovoid, sub-orbicular, ellipsoid, or fusiform (bilaterally flattened).
............ ............ 13 Pseudobulbs (on mature plants) > 30 (-50) cm long
............ ............ 13 Pseudobulbs (on mature plants) < 30 cm long (typically < 15 cm long).
............ ............ ..14 Inflorescence terminal (arising from the apex of the pseudobulb).
............ ............ ....15 Capsules prominently 3-winged
............ ............ ....15 Capsules not prominently 3-winged.
............ ............ ......16 Pseudobulbs ovoid-pyriform; 1-3 linear-lanceolate leaves per stem
............ ............ ......16 Pseudobulbs ovoid; 1 (rarely 2) oblong-ovate leaf per stem
............ ............ ..14 Inflorescence basal (arising from the base of the pseudobulb).
............ ............ ........17 Inflorescence a spike with 12-28 sessile flowers
............ ............ ........17 Inflorescence a raceme or panicle, not a spike (flowers pedicellate).
............ ............ ..........18 Inflorescence > 100 (-250) cm in length
............ ............ ..........18 Inflorescence < 50 cm in length.
............ ............ ............ 19 Pseudobulb completely enveloped by 6-7 conduplicate distichous leaf sheaths; flowers borne singly on short pedicels arising from leaf axil, without brown blotches; flowers self-pollinating
............ ............ ............ 19 Pseudobulb not enveloped by leaves; pedicels originating from inflorescence; flowers yellow to white, with or without brownish blotches, not self-pollinating.
............ ............ ............ ..20 Plants conspicuously rhizomatous; inflorescence < 1 cm long; pseudobulbs cylindric to ovoid
............ ............ ............ ..20 Plants not rhizomatous; inflorescence > 1 cm in length; pseudobulbs cylindric or elliptic.
............ ............ ............ ....21 Perianth segments long caudate; sepals 3-20 cm long
............ ............ ............ ....21 Perianth segments not long caudate (instead, oblong-elliptic); sepals 2.2-12 cm long.
............ ............ ............ ......22 Perianth segments white to cream-yellow colored with maroon stripes; pollinia not borne on long slender stipe
............ ............ ............ ......22 Perianth segments cream colored to pale orange with condensed red-purple spots; pollinia borne on a long slender stipe
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