Disa polygonides Lindl.

Species

Angiosperms > Asparagales > Orchidaceae > Disa

Characteristics

Plants slender to robust, 150-700 mm tall; sterile shoots rarely produced, leaves 3-4, linear to lorate; fertile shoots: cauline leaves few if sterile shoots developed, otherwise numerous, 6-25, imbricate. Inflorescences dense, 80-100-flowered; bracts as long as flowers. Flowers brick-red, less than 10 mm in diameter. Median sepal erect, obªtuse, galea 5-7 x 3-4 x c. 1 mm deep, upper marªgin slightly incurved; spur pendent, reaching beªlow base of median sepal; lateral sepals spreading forwards, narrowly oblong, 6-7 mm long, shal-lowly concave, apiculus rudimentary. Petals narªrowly obovate, apex slightly keeled, 4-6 x 2-3 mm, curving over and behind anther. Lip subpen-dent or horizontal, lorate to linear, rounded, c. 6 x 1 mm. Anther erect; stigma pulvinate; rostellum simple.
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Terrestrial herb, fairly robust, geophyte, 0.15-0.70 m high; with root tubers; sterile shoot rare. Leaves of fertile shoot 6-25, up to 80 mm long, cauline, grading into floral bracts. Inflorescence a very dense, cylindrical, tapering spike, 30-170 mm long; flowers 30-80, red. Sepals subequal; median sepal erect, galeate, spurred; spur pendent, 1.5-4.5 mm long, slender to club-shaped; lateral sepals 6-7 mm long, porrect. Petals narrowly obovate, acute. Lip 6 mm long, pendent. Flowering time Oct.-Feb.
Fertile shoots 15–70 cm long; cauline leaves imbricate, few if sterile shoots are present, numerous if not, largest at the base of the shoot, to 25 cm long, linear to narrowly lanceolate, acute.
Terrestrial herb, up to 0.7 m high. Inflorescence cylindrical, somewhat tapering, 30-170 mm long with numerous flowers. Spur (1.5-) 3.3-4.5 mm long. Petals narrowly obovate, acute. Flowers red.
Slender or robust, tuberous geophyte to 70 cm. Leaves cauline, few, linear to lorate. Flowers many in a dense raceme, red, spur pendent, lateral sepals 6-7 mm long, anther erect.
Spur pendent from just above the base of the galea, reaching to below the base of the galea, 1.5–3.3–4.5 mm long, cylindrical.
Dorsal sepal forming an erect galea, 5–7 mm long, 3–4 mm wide and c. 1 mm deep, elliptic to subobovate, obtuse.
Floral bracts narrowly ovate, acute to subacuminate, as tall as the flowers with the apices reflexed.
Terrestrial herb with separate fertile and sterile shoots, perennating by testicular tubers.
Sterile shoots rare, produce 3–4 semi-erect leaves c. 25 cm long, linear to lorate, acute.
Inflorescence dense, 3–17 cm long, cylindrical, 80–100-flowered.
Lateral sepals 6–7 mm long, narrowly oblong, acute.
Lip c. 6 mm long, lorate to linear, rounded.
Petals 4–6 mm long, narrowly obovate, acute.
Stigma with well developed lateral lobes.
Flowers brick-red, rarely orange.
Anther erect, c. 3.5 mm long.
Ovary 5–10 mm long.
Rostellum simple.
Life form perennial
Growth form herb
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Sexuality hermaphrodite
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Mature height (meter) 0.15 - 0.7
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Environment

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Hardiness (USDA) 9-12

Usage

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Edible -
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Cultivation

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Images

Disa polygonides unspecified picture

Distribution

Disa polygonides world distribution map, present in Mozambique, eSwatini, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:630216-1
WFO ID wfo-0000944515
COL ID 36S2Q
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Disa natalensis Disa polygonides