Tên Khoa học: Lilium polanei Gagnep.
Tên tiếng Anh:
Tên tiếng Việt:  Hoa loa kèn núi
Tên khác:

Described from northern Laos and northwestern Vietnam (“TONKIN: kilom. 8, au col de Lo-qui-ho, près Chapa (Poilane). – LAOS: entre Muong-het et M. Seng (Poilane)”). Syntypes (“Laos, entre Muong-het et M. Seng, 1400 m alt., 12-9-1929, Poilane 16929” [P-P00730969] and “Tonkin, Lo qui Ho près Chapa, 1400 m alt., 4-8-1926, Poilane 12811” [P00730970; P-P00730971]) – P.  . 4C.

Distribution: VIETNAM: Cao Bang province (Bao Lac district, Ca Thanh municipality); Ha Giang province (Dong Van district, Sinh Lung municipality; Meo Vac district, Shung Cha municipality; Quan Ba district, Can Ty municipality; Yen Minh district, Lao Va Chai municipality); Lai Chau province (Sin Ho district, Xa De Phin municipality); Lao Cai province (Sa Pa town); Son La province (Moc Chau district, Van Ho municipality). LAOS: Houaphanh, Oudomxai, Louangphabang and Luang Namtha?  . 4C.

Habitat, phenology and conservation status: Terrestrial or lithophytic, bulbiferous herb with an erect stout stem to 2 m tall. Primary or secondary mossy mixed forests of broad-leaved trees and conifers (like Pinus wangii, Podocarpus pilgeri, Pseudotsuga sinensis and Tsuga chinensis) on karstic rocky limestone, common on very steep rocky slopes and on shelves of shady cliffs near mountain tops, 1200–1600 m a.s.l. Flowers in June–August under cultivation. This species is rare and is regarded as endangerous according to IUCN Red List criteria.

Notes: Lilium poilanei is a rare, integral element of highly endangered coniferous forests on limestone. It is very sensitive for forest logging and highly endangered by the quick loss of its habitats. Besides, the bulbs of this plant have often been collected from natural habitats for exports to China where they are medicinally used. These factors are plunging the species into the verge of extinction. Photographs of this rare species are available at the web-site “The Genus Lilium’- http://www.the-genus-lilium.com /images/Lilium/poilanei06.jpg – 09.jpg (Hohenegger, 2011). This species was once collected at “entre Muong-het et M. Seng” (syntype) in Laos. This habitat is presently not precisely located, but may be in Houaphanh, Oudomxai, Louangphabang or Luang Namtha province. It was casually overlooked in the latest treatise of the Laotian flora by Newman et al. (2007).

Studied specimens: VIETNAM: Lao Cai province – Chapa, 1600 m a.s.l., July, 1925, Pételot sine no (P); Chapa, 1500 m a.s.l., July, 1930, Pételot 3738 (P); Chapa, 17 May 1961, sine coll. no 2283 (LE); Cao Bang province, Nguyen Binh district, Ca Thanh municipality, about 3 km to SW from Yen Lac village (22°44'N 105°50'E), about 42 km to NW from Cao Bang town, 1400–1450 m a.s.l., 18 November 1998, Averyanov L., P.K. Loc, N.X. Tam, CBL 383 (HN, LE, MO, P); Ha Giang province – Yen Minh district, Lao Va Chai municipality, vicinities of Ngan Chai village, 6 km to W of Yen Minh town (23°07'N 105°08'E), 1500–1600 m a.s.l., 1 May 1999, P.K. Loc, P.H. Hoang, Averyanov L., CBL 1961 (HN, MO); Meo Vac district, Shung Cha municipality, Lo Loi Phin village (23º11'N 105º17'E), 1200–1250 m a.s.l., 5 October 1999, N.T. Hiep, N.Q. Binh, L. Averyanov, P. Cribb, NTH 3332 (HM); Quan Ba district, Can Ty municipality, in the vicinity of Lung Vai village at left side of Mien River, 23°05'09''N 105°03'23''E, 1440 m a.s.l., 8 May 2002, P.K. Loc, L. Averyanov, N.T. Vinh, HAL 1438 (HN); Dong Van district, Sinh Lung municipality, vicinities of Ha De village around point 23°12'23''N 105°17'18''E, 1450 m a.s.l., 15 December 2005, L. Averyanov, T.V. Thao, P.V. The, HAL 8617 (HN); Lai Chau province – Sin Ho district, Xa De Phin municipality, Mao Xa Phin village, 22°18'49''N 103°15'18''E, 1828 m a.s.l., 8 June 2006, P.K. Loc, N.T. Vinh, N.S. Khang, P.N. Quan, T.A. Suu, HAL 8738 (HN, MO); Son La province – Moc Chau district, Van Ho municipality, Hua Tat village, 20°46'16''N 104°47'44''E, 1200–1350 m a.s.l., 29 October 2006, N.T. Hiep, L. Averyanov, P.V. The, HAL 9363 (LE).