Gunnera

by | Mar 28, 2018 | Gunnera

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Mecardonia acuminata subsp. peninsularis

Mecardonia (axilflower) is a genus of herbaceous plants in the family Plantaginaceae. 31 species have been described,[3] of which 12 are accepted. Its distribution is predominantly in South America, and South East United States, including Florida [4] [5] and Alabama[6] [7] but may be found as far north as Virginia. [8](see map)[9] Five species are found in Argentina[10] and three in the US.[11]

Description

They are herbaceous procumbent glabrous plants. They are mostly blackened when they are dry. Their stems are 5–40 cm in length and they have 4-alate leaves. Ovate leaves 7–25 mm in length and 3–16 mm wide, with a crenate edge; petiolate. Solitary axillary flowers, pedicles 8-20 (-26) mm in length, basally bibracteolate; 5-lobed calyx, with unequal lobes, more or less free to the base, imbricate, the adaxial lobe widely lanceate to ovate, 5–9.5 mm long and 3–6 mm wide, slightly accrescent, the 2 middle lobes longer and overlapping, the 2 abaxial lobes nearly the same size as the adaxial and overlapping the middle lobes; 5-lobed corolla, 7–8 mm long, yellow with purple at the throat, bearded at the mouth; 4 fertile stamens. Ovoid fruit capsule, 5–7 mm long, loculicidal; ovoid, reticulated seeds.[12]

Taxonomy

The genus was described by Ruiz & Pav., published in Florae Peruvianae, et Chilensis Prodromus 95. 1794. [12][13] The type species is: Mecardonia procumbens Ruiz & Pav. The genus is named after Antonio Meca y Cardona, who founded the botanical gardens in Barcelona, in 1784.[14][15] [16]

Rossow (1987) in his taxonomic revision of the genus, recognized ten species. A new species, M kamogawae, was identified in Argentina by Greppi and Hagiwara (2011).

Cultivation

Sold as an ornamental garden flower, such as Mecardonia Magic Carpet Yellow, as annuals in colder areas.

Species

References

  1. ^ USDA
  2. ^ The Plant List
  3. ^ Mecardonia on PlantList
  4. ^ Atlas of Florida Vascular Plants: Mecardonia
  5. ^ The Institute for Regional Conservation
  6. ^ Gardening in the Coastal Southeast
  7. ^ Alabama Plant Atlas: Mecardonia
  8. ^ Digital Atlas of the Virginia Flora
  9. ^ Map of distribution
  10. ^ Alderete, L.; Mori, M.; Kato, A.; Escandón, A.. Establishment of an in vitro micropropagation protocol for Mecardonia tenella. Electronic Journal of Biotechnology, North America, 915 06 2006.
  11. ^ a b c d Adjoa Richardson Ahedor. Systematics of the Mecardonia acuminata (tribe Gratioleae, Plantaginaceae) complex of southeastern USA
  12. ^ a b "Mecardonia". Tropicos.org. Missouri Botanical Garden. Retrieved 20 January 2013.
  13. ^ Forzza, R. C. et al. 2010. 2010 Lista de espécies Flora do Brasil. Archived 2014-03-26 at the Wayback Machine
  14. ^ Barcelona: Pel medi ambient. Universitat Gardens
  15. ^ Idárraga-Piedrahita, A., R. D. C. Ortiz, R. Callejas Posada & M. Merello. (eds.) 2011. Fl. Antioquia: Cat. 2: 9–939. Universidad de Antioquia, Medellín.
  16. ^ D. Miguel Colmeiro (1858). Mecardonia. La Botánica y los botánicos de la Península Hispano-Lusitana- Estudios Bibliográficoa y Biográficos. Madrid:Imprenta Rivadeneyra.

Sources

External links

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