Plagiolirion

Plagiolirion
Scientific classification
Kingdom:	Plantae
Clade:	Embryophytes
Clade:	Tracheophytes
Clade:	Spermatophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Amaryllidaceae
Subfamily:	Amaryllidoideae
Tribe:	Eucharideae
Genus:	Plagiolirion; Baker
Species:	P. horsmannii
Binomial name
	Plagiolirion horsmannii; Baker
	Plagiolirion is endemic to Colombia
Synonyms
	Eucharis horsmannii (Baker) Traub; Urceolina horsmannii (Baker) Traub;

Plagiolirion is a monotypic genus in the family Amaryllidaceae endemic to Colombia.^[1] It has only one known species, Plagiolirion horsmannii,^[1] which is rare in the wild and was thought to be extinct until it was rediscovered in the Río Cauca Valley in 1989.^[3]

Description

Herbarium specimen of *Plagiolirion horsmanii*

Vegetative characteristics

Plagiolirion horsmannii is a bulbous,^[4]^[5] perennial herb with subglobose^[3] or ovoid,^[4]^[6] tunicate, 5–6 cm long, and 5–5.5 cm wide bulbs^[3] with fleshy roots.^[4] The bulbs have offsets at the base.^[3]^[7]

Generative characteristics

The scapose, umbellate inflorescences with a terete, solid,^[3] erect,^[8] glaucous green,^[6] 49–66 cm long, and 0.5 cm wide scape,^[3] bears 10–41^[3] white,^[5]^[9] zygomorphic,^[10] inodorous, protrandrous, pedicellate,^[4] 2.5–3 cm long,^[3] and 3–4 cm wide flowers.^[9] The thin pedicels are 1.5–2 cm long.^[3]

Cytology

The diploid chromosome number of Plagiolirion horsmannii is 2n = 46.^[3]^[10]

Taxonomy

The genus and species were first described by John Gilbert Baker in 1883.^[4] The genus is placed in the tribe Eucharideae.^[11]

Etymology

The generic name Plagiolirion, from plagios meaning 'oblique' and leirion meaning 'lily',^[7] is derived from the floral morphology.^[6] The specific epithet horsmannii honours Fred Horsman,^[8] who imported the species to Colchester, United Kingdom.^[9]^[6]^[7]

Ecology

Habitat

It occurs in the Colombian Andes.^[7]

References

1 2 3 "Plagiolirion Baker". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-06-27.
1 2 3 "Plagiolirion horsmannii Baker". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-06-27.
1 2 3 4 5 6 7 8 9 10 Alan W. Meerow and Philip Silverstone-Sopkin. 1995. The rediscovery of Plagiolirion horsmannii Baker (Amaryllidaceae) Brittonia 47(4): 426-431
1 2 3 4 5 Baker, J. G. (1883). Plagiolirion horsmannii. Gard. Chron, 2(38), 1888.
1 2 The Gardeners' Chronicle: A Weekly Illustrated Journal of Horticulture and Allied Subjects. p. 105. (1883). Vereinigtes Königreich: Gardeners Chronicle.
1 2 3 4 Weathers, J. (1890). Plagiolirion horsmannii. Gardeners’ Chronicle, p. 262.
1 2 3 4 Weathers, J. (2009). The Bulb Book. p. 398. USA: Applewood Books.
1 2 The Garden: An Illustrated Weekly Journal of Gardening in All Its Branches. p. 42. (1884). Vereinigtes Königreich: (n.p.).
1 2 3 Wiener illustrirte Garten-Zeitung: Organ d. K. K. Gartenbau-Gesellschaft in Wien. p. 94. (1884). Österreich: Frick.
1 2 Silverstone-Sopkin, P. A. (2011). Los muertos vivientes: La historia natural de cuatro lirios amazónicos del suroccidente de Colombia (Eucharis y Plagiolirion, Amaryllidaceae). pp. 24–25. Universidad del Valle.
↑ Plagiolirion. (n.d.). Pacific Bulb Society. Retrieved March 4, 2025, from https://www.pacificbulbsociety.org/pbswiki/index.php/Plagiolirion

[POWO_1588-1-1] 1 2 3 "Plagiolirion Baker". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-06-27.

[POWO_201154-2-2] 1 2 3 "Plagiolirion horsmannii Baker". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-06-27.

[Meerow_&_Silverstone-Sopkin,_1995-3] 1 2 3 4 5 6 7 8 9 10 Alan W. Meerow and Philip Silverstone-Sopkin. 1995. The rediscovery of Plagiolirion horsmannii Baker (Amaryllidaceae) Brittonia 47(4): 426-431

[Baker,_1883-4] 1 2 3 4 5 Baker, J. G. (1883). Plagiolirion horsmannii. Gard. Chron, 2(38), 1888.

[Gardeners'_Chronicle,_1883-5] 1 2 The Gardeners' Chronicle: A Weekly Illustrated Journal of Horticulture and Allied Subjects. p. 105. (1883). Vereinigtes Königreich: Gardeners Chronicle.

[Weathers,_1890-6] 1 2 3 4 Weathers, J. (1890). Plagiolirion horsmannii. Gardeners’ Chronicle, p. 262.

[Weathers,_2009-7] 1 2 3 4 Weathers, J. (2009). The Bulb Book. p. 398. USA: Applewood Books.

[The_Garden,_1884-8] 1 2 The Garden: An Illustrated Weekly Journal of Gardening in All Its Branches. p. 42. (1884). Vereinigtes Königreich: (n.p.).

[Wiener_Garten-Zeitung,_1884-9] 1 2 3 Wiener illustrirte Garten-Zeitung: Organ d. K. K. Gartenbau-Gesellschaft in Wien. p. 94. (1884). Österreich: Frick.

[Silverstone-Sopkin,_2011-10] 1 2 Silverstone-Sopkin, P. A. (2011). Los muertos vivientes: La historia natural de cuatro lirios amazónicos del suroccidente de Colombia (Eucharis y Plagiolirion, Amaryllidaceae). pp. 24–25. Universidad del Valle.

[PBS-11] Plagiolirion. (n.d.). Pacific Bulb Society. Retrieved March 4, 2025, from https://www.pacificbulbsociety.org/pbswiki/index.php/Plagiolirion

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