• Source: Mespilus canescens

Mespilus canescens, commonly known as Stern's medlar, is a large shrub or small tree, recently discovered in Prairie County, Arkansas, United States, and formally named in 1990. It is a critically endangered endemic species, with only 25 plants known, all in one small (9 ha) wood, now protected as the Konecny Grove Natural Area.
Originally discovered by Jane Stern (hence "Stern's medlar") in 1968–69, the plant was difficult to identify, and at times placed in the genus Crataegus, and even Aronia. J.B. Phipps first described it as belonging to the genus Mespilus in 1990.
It has been shown by genetic analysis to be closely related to the common medlar Mespilus germanica, which was previously the only known species in the genus. Subsequent molecular analyses suggest that Stern's medlar is likely a hybrid between cultivated M. germanica and one or two native North American species of Crataegus, in which case it should be referred to as × Crataemespilus canescens.




Description


Thorns are sparse, 2–3 cm (0.8–1.2 in) long. The leaves are 2–4 cm (0.8–1.6 in) long. The five-petalled white flowers are produced in late spring. The fruit is an almost spherical pome, 8–12 mm (0.3–0.5 in) diameter; it differs from common medlar fruit in being deep glossy red when ripe (not brown).




Uses


While Stern's medlar has been noted for its great horticultural potential, the plant is cultivated mainly for botanical purposes.




See also


Flora of Arkansas




References






Further reading


Enzenbacher, T. 2019. A Medlar by Any Other Name. Arnoldia, 77(1): 16–25.




External links


Center for Plant Conservation: Mespilus canescens
Phipps, J.B., Weeden, N.F., & Dickson, E.E. 1991. Isozyme evidence for the naturalness of Mespilus L. (Rosaceae, subfam. Maldoideae). Systematic Botany 16: 546-552.

Kata Kunci Pencarian:

• Mespilus canescens
• Mespilus
• Mespilus germanica
• × Crataemespilus
• Medlar (disambiguation)
• List of flora of Arkansas
• Aria edulis
• List of culinary fruits
• List of trees and shrubs by taxonomic family
• List of Rosaceae of Great Britain and Ireland