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This species is accepted, and its native range is Tanzania to S. Tropical Africa, E. Cape Prov. to S. KwaZulu-Natal.
A specimen from Kew's Herbarium

[FZ]

Orchidaceae, I. la Croix & P.J. Cribb. Flora Zambesiaca 11:2. 1998

Morphology General Habit
Epiphytic herb.
Morphology Stem
Stem short, to c. 6 cm long, usually shorter, covered with acutely pointed old leaf bases.
Morphology Roots
Roots c. 4 mm in diameter, smooth, grey.
Morphology Leaves
Leaves 4–5, forming a fan; blades 3–15 cm × 3.5–6 mm, linear, conduplicate, somewhat recurved.
Morphology Reproductive morphology Inflorescences
Inflorescences 1–2, arising at base of plant, suberect or arching, 5–20 cm long, fairly laxly 4–12-flowered.
Morphology Reproductive morphology Flowers
Flowers white, the spur greenish at tip, the pedicel and ovary sometimes salmon-pink.
Morphology Reproductive morphology Flowers Pedicel and Ovary
Pedicel and ovary slender, 15 mm long.
Morphology Reproductive morphology Inflorescences Bracts
Bracts 1.5–2 mm long, scarious.
Morphology Reproductive morphology Flowers Calyx
Sepals 5–8 × 2.5–3 mm, lanceolate, acute, the margins rolled back so that they appear narrower; dorsal sepal erect, lateral sepals deflexed.
Morphology Reproductive morphology Flowers Corolla
Petals 5–7 × 1.5–2 mm, lanceolate, acuminate, reflexed.
Morphology Reproductive morphology Flowers Labellum
Lip more or less entire to obscurely three-lobed, 5–7 × 2.3–3 mm, rhomboid, acute; spur 3.5–6 cm long, very slender, gently incurved.
Morphology Reproductive morphology Flowers Column
Column 1.5–2 mm long, anther cap brown.

[FTEA]

Orchidaceae, V. S. Summerhayes. Flora of Tropical East Africa. 1968

Morphology General Habit
An erect or spreading epiphyte with a short stem up to 6 cm. long.
Morphology Roots
Roots 2 mm. in diameter.
Morphology Leaves
Leaves conduplicate, often recurved, linear, obtuse, 3–15 cm. long, 3.5–6 mm. wide.
Morphology Reproductive morphology Inflorescences
Inflorescences spreading to suberect, 5–20 cm. long, laxly 4–12-flowered; rhachis somewhat fractiflex; bracts ovate-triangular, acute, 1.5–2 mm. long.
Morphology Reproductive morphology Flowers
Flowers white; pedicel and ovary scabrid, 9–12 mm. long.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal ovate, acute or acuminate, 5–6.5 mm. long, 3 mm. wide; lateral sepals obliquely oblong-lanceolate, acute, 5–7 mm. long, 2.3–3 mm. wide, keeled on the reverse.
Morphology Reproductive morphology Flowers Corolla
Petals oblong-lanceolate, acuminate, 5–6.5 mm. long, 1.5–2 mm. wide.
Morphology Reproductive morphology Flowers Labellum
Lip obscurely 3-lobed, subrhombic to lanceolate, acute, 5–6.5 mm. long, 2.3–3 mm. wide.
Morphology Reproductive morphology Flowers Spur
Spur slender, cylindrical, 3.5–5.3 cm. long.
Morphology Reproductive morphology Flowers Column
Column ± 2 mm. long.
Habitat
Epiphyte in woodland on Brachystegia, Uapaca and Albizia; 1300–2100 m.
Distribution
T4 T7 T8

Native to:

Cape Provinces, KwaZulu-Natal, Malawi, Mozambique, Tanzania, Zambia, Zimbabwe

Ypsilopus erectus (P.J.Cribb) P.J.Cribb & J.Stewart appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Williamson, G. [1545], Zambia K000306410 isotype
Pawek, J. [966], Malawi K000390321
Morris, B. [50], Malawi K000390323
Morris, B. [122], Malawi K000390320
Brummitt, R.K. [11098], Malawi K000390319
Dowsett-Lemaire, F. [1194], Malawi K000390318
Williamson, G. [1545], Zambia K000306409 isotype
Morris, B. [s.n.], Malawi K000390322
Slater, R., Zimbabwe Ypsilopus longifolius subsp. erectus 40739.000
Leedal, G.P. [3564], Tanzania Ypsilopus longifolius subsp. erectus 40765.000
la Croix, I. [134], Malawi Ypsilopus longifolius subsp. erectus 45140.000

First published in Kew Bull. 40: 417 (1985)

Accepted by

  • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Johnson, S. & Bytebier, B. (2015). Orchids of South Africa. A field guide: 1-536. Struik nature, Cape Town, South Africa.

Literature

Flora of Tropical East Africa

  • Cribb & J. Stewart in Kew Bulletin 40: 419 (1985).

Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0