Maleae
| Maleae Temporal range:
| |
|---|---|
| File:Lindleya mespiloides Kunth.jpg | |
| Lindleya mespiloides in bloom | |
| Scientific classification Edit this classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Rosaceae |
| Subfamily: | Amygdaloideae |
| Tribe: | Maleae Small 1933 |
| Subtribes | |
| Synonyms | |
The Maleae (incorrectly Pyreae) are the apple tribe in the rose family, Rosaceae. The group includes a number of plants bearing commercially important fruits, such as apples and pears, while others are cultivated as ornamentals. Older taxonomies separated some of this group as tribe Crataegeae,[2][3] as the Cydonia group (a tentative placement),[3] or some genera were placed in family Quillajaceae.[3]
The tribe consists exclusively of shrubs and small trees. Most have pomes, a type of accessory fruit that does not occur in other Rosaceae. All except Vauquelinia (with 15 chromosomes) have a basal haploid chromosome count of 17, instead of 7, 8, or 9 as in the other Rosaceae.[4]
There are approximately 28 genera that contain about 1100 species worldwide, with most species occurring in the temperate Northern Hemisphere.
Current classification
[edit | edit source]Core members of the group
[edit | edit source]A traditional circumscription of Maleae includes the following genera:[2][3][5][6]
- Amelanchier - serviceberry, juneberry, saskatoon, sugarplum
- Aria - whitebeam
- Aronia - chokeberry
- Chaenomeles - Japanese quince
- Chamaemeles
- Chamaemespilus - false medlar
- Cormus - service tree
- Cydonia - quince
- Dichotomanthes
- Docynia
- Docyniopsis
- Eriobotrya -loquat
- Eriolobus
- Hesperomeles
- Heteromeles - toyon
- Malacomeles - false serviceberry
- Malus - apple, crabapple
- Osteomeles
- Peraphyllum - wild crab apple, squaw apple
- Phippsiomeles[7]
- Photinia
- Pourthiaea[7]
- Pseudocydonia - Chinese quince
- Pyrus - pear
- Rhaphiolepis - hawthorn
- Sorbus (s.s.) - rowan
- Stranvaesia[7]
- Torminalis - chequer tree
and graft chimeras:
+ Pyrocydonia (Pirocydonia)
Tribe Crataegeae
[edit | edit source]A recent taxonomic treatment includes the following genera in Maleae that were earlier separated as tribe Crataegeae (or as intertribe hybrids):[10]
- Cotoneaster - cotoneaster
- Crataegus - hawthorn
- Mespilus - medlar
- Pyracantha - firethorn
intergeneric (including intertribal) hybrids:[8]
and the graft hybrid:
Former members of family Quillajaceae
[edit | edit source]The following genera were previously placed in tribe Quillajeae in Rosaceae, or in family Quillajaceae. Their fruit are dry capsules, not pomes.
The Cydonia group
[edit | edit source]The Cydonia group within the Maloid Rosaceae was a tentative grouping of pome-fruited genera with many ovules (rather than just two) per carpel.[3] The genera involved were:
It is not yet clear whether this group is monophyletic within the Maleae. Molecular data indicate a close relationship between Cydonia and Pseudocydonia.[6] Multiple ovules per carpel also occur in Kageneckia, a non-pome-bearing genus.[6] Chloroplast DNA analysis, but not nuclear DNA, shows a tight relationship between Cydonia and Dichotomanthes, a non-pome-bearing genus.[6]
References
[edit | edit source]
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- ^ a b G. K. Schulze-Menz 1964. Reihe Rosales. in A. Engler's Syllabus der Pflanzenfamilien mit besonderer Berücksichtigung der Nutzpflanzen nebst einer Übersicht über die Florenreiche und Florengebiete der Erde, Gebrüder Borntraeger, Berlin
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- ^ a b Stace, C. A. 1975. Hybridization and the flora of the British Isles. Academic Press, London.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Potter, D.; Eriksson, T.; Evans, R.C.; Oh, S.H.; Smedmark, J.E.E.; Morgan, D.R.; Kerr, M.; Robertson, K.R.; Arsenault, M.P.; Dickinson, T.A.; Campbell, C.S. (2007). Phylogeny and classification of Rosaceae. Plant Systematics and Evolution. 266(1–2): 5–43. Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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