Rhodolirium
Rhodolirium montanum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Amaryllidaceae
Subfamily: Amaryllidoideae
Subtribe: Traubiinae
Genus: Rhodolirium
Phil.[1]
Type species
Rhodolirium montanum
Phil.
Species
  • Rhodolirium andicola
  • Rhodolirium chilense
  • Rhodolirium fulgens
  • Rhodolirium laetum
  • Rhodolirium montanum
  • Rhodolirium speciosum
Synonyms
Rhodolirium andicola

Rhodolirium is a small South American genus in the tribe Hippeastreae of the family Amaryllidaceae. Although originally described by Philippi in 1858[1] it has long remained buried in other taxa, principally Hippeastrum and more recently Rhodophiala. Only in recent years has it been rehabilitated.[2][3]

Restoring the genus was first proposed by Naranjo & Poggio (2000),[4] and accepted by Ravenna in 2003,[5] although he used the name Rhodolirion, originally used by Baker (1878) in his very broad construction of Hippeastrum including both Rhodophiala and "Rhodolirion". He also renamed Rhodolirium andinum as Hippeastrum rhodolirion.[6] Later he elevated Rhodolirion to the status of subgenus, with H. rhodolirion (subsequently Rhodophiala rhodolirion)[7] as the type species .[8] Subsequently the genus has been treated as part of Rhodophiala.[9][2]

Description

Flowers single or pluriflor, perigone infundibular (funnel shaped) with elongated floral tube. Paraperigonium, if present, has free segments. Stigma capitate.[2]

Taxonomy

For early treatment of Rhodolirium, see Taxonomy of Hippeastrum. The rehabilitation has yet (as of February 2016) to be recognised by the World Checklist of Selected Plant Families,[10] but is by the Missouri Botanical Gardens, with six species.[11] The ability to resolve phylogenetic relationships based solely on morphological data is limited in the Amaryllidaceae, necessitating the use of molecular methods in addition. In their study of the American amaryllidaceae, Meerow et al. (2000) noted that Rhodophiala was polyphyletic.[12][2]

Subsequently Munoz et al. undertook a detailed study of Rhodophiala/Rhodolirium species and related genera and confirmed the genus as circumscribed was indeed polyphyletic with three species segregating as a sister group to Phycella which they proposed to resurrect as genus Rhodolirium, while the remainder of the species segregated in a separate clade more closely associated with Hippeastrum, which they proposed as Rhodophiala sensu stricto. When the morphology of the two groups thus identified was examined they were distinguishable by Rodophiala having a trifid stigma compared to capitate for Rhodolirium, by the nature of the paraperigon segments, and by their chromosome numbers (2n=18 for Rhodophiala and 16 for Rhodolirium) and their chromosome symmetry. Both groups appeared to be monophyletic and their differences sufficient to justify separation into two distinct genera. Rhodophiala and Hippeastrum appeared sufficiently close to explain their treatment as a single genus in older classifications, but their separation was consistent with the study by Meerow et al.[2]

The proposal to separate the two genera supports Ravenna's morphological studies, with Rhodolirium montanum (formerly Rhodophiala rhodolirion) as the type species for the new genus. Subsequent phylogenetic analysis by Garcia et al. (2014) confirmed this distinction between the genera and proposed dividing Hipppeastrea into two subtribes, Hippeastrinae and Traubiinae, placing Rhodophiala in the first and Rhodolirium in the second.[3]

Subdivision

Five to six species.[2][9]

  • Rhodolirium andicola (Poepp.) Ravenna syn. Rhodophiala andicola (Chile to Argentina (Neuquén))
  • Rhodolirium chilense (L'Hér.) Ravenna syn. Rhodophiala chilensis (Chile)
  • Rhodolirium fulgens
  • Rhodolirium laetum (Phil.) Ravenna syn. Rhodophiala pratensis (Northern and Central Chile)
  • Rhodolirium montanum Phil. syn. Rhodophiala rhodolirion (Chile to Argentina (Mendoza))
  • Rhodolirium speciosum (Herb.) Ravenna

Distribution and habitat

From northern Chile, in coastal vegetation zones to Osorno province in the south, at altitudes of 150–2500 m. Also in Argentina.[2]

References

  1. 1 2 Philippi 1858.
  2. 1 2 3 4 5 6 7 Munoz et al 2011.
  3. 1 2 Garcia et al 2014.
  4. ↑ Naranjo & Andrada 1975.
  5. ↑ Ravenna 2003.
  6. ↑ Baker 1878.
  7. ↑ WCLSPF 2015, Rhodophiala rhodolirion.
  8. ↑ Baker 1888.
  9. 1 2 Tropicos 2015, Rhodolirion.
  10. ↑ WCLSPF 2015, Rhodolirium.
  11. ↑ Tropicos 2015, Rhodolirium.
  12. ↑ Meerow et al 2000.

Bibliography

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.