|A. a. var. semiintegrifolia; Skagit Bay, Washington|
Amelanchier alnifolia, the saskatoon, Pacific serviceberry, western serviceberry, alder-leaf shadbush, dwarf shadbush, chuckley pear, or western juneberry, is a shrub with edible berry-like fruit, native to North America from Alaska across most of western Canada and in the western and north central United States. Historically it was also called "pigeon berry". It grows from sea level in the north of the range, up to 2,600 m (8,530 ft) elevation in California and 3,400 m (11,200 ft) in the Rocky Mountains.
The name "saskatoon" derives from the Cree inanimate noun misâskwatômina (misâskwatômin NI sg saskatoonberry, misâskwatômina NI pl saskatoonberries). The city of Saskatoon, Saskatchewan is named after the berry.
As with all species in the genus Amelanchier, the flowers are white, with 5 quite separate petals. In A. alnifolia, they are about 2–3 cm (0.8–1.2 in) across, and appear on short racemes of 3–20 somewhat crowded together, in spring while the new leaves are still expanding.
- Amelanchier alnifolia var. alnifolia. Northeastern part of the species' range.
- Amelanchier alnifolia var. pumila (Nutt.) A.Nelson. Rocky Mountains, Sierra Nevada.
- Amelanchier alnifolia var. semiintegrifolia (Hook.) C.L.Hitchc. Pacific coastal regions, Alaska to northwestern California.
Cultivation and uses 
Seedlings are planted with 13–20 ft (4–6 m) between rows and 1.5–3 ft (0.5–1 m) between plants. An individual bush may bear fruit 30 or more years.
Saskatoons are adaptable to most soil types with exception of poorly drained or heavy clay soils lacking organic matter. Shallow soils should be avoided, especially if there is a high or erratic water table. Winter hardiness is exceptional but frost can damage blooms as late as May. Large amounts of sunshine are needed for fruit ripening.
With a sweet nutty taste, the fruits have long been eaten by Canada's Aboriginal people, fresh or dried. They are well known as an ingredient in pemmican, a preparation of dried meat to which saskatoon berries are added as flavour and preservative. They are also often used in pies, jam, wines, cider, beers and sugar-infused berries similar to dried cranberries used for cereals, trail mix and snack foods.
Diseases and pests 
Nutrients and potential health benefits 
|Nutrients in raw saskatoon berries|
|Nutrient||Value per 100 grams||% Daily Value|
|Total dietary fiber||5.9 g||20%|
|Sugars, total||11.4 g||8%|
|Calcium, Ca||42 mg||4%|
|Magnesium, Mg||24 mg||6%|
|Iron, Fe||1 mg||12%|
|Manganese, Mn||1.4 mg||70%|
|Potassium, K||162 mg||3%|
|Sodium, Na||0.5 mg||0%|
|Vitamin C||3.6 mg||4%|
|Vitamin A, IU||11 IU||1%|
|Vitamin E||1.1 mg||7%|
|Folate, mcg||4.6 mcg||1%|
|Panthothenic acid||0.3 mg||6%|
Saskatoon berries contain significant Daily Value amounts of total dietary fibre, vitamins B2 (riboflavin) and biotin, and the essential minerals, iron and manganese, a nutrient profile similar to the content of blueberries.
Notable for polyphenol antioxidants also similar in composition to blueberries, saskatoons have total phenolics of 452 mg per 100 g (average of Smoky and Northline cultivars), flavonols (61 mg) and anthocyanins (178 mg), although others have found the phenolic values to be either lower in the Smoky cultivar or higher. Quercetin, cyanidin, delphinidin, pelargonidin, petunidin, peonidin, and malvidin were polyphenols present in saskatoon berries.
|Wikimedia Commons has media related to: Amelanchier alnifolia|
- Germplasm Resources Information Network: Amelanchier alnifolia
- Schorger, A.W. 1955. The Passenger Pigeon; its natural history and extinction. The University of Wisconsin Press, Madison.
- Plants of British Columbia: Amelanchier alnifolia
- Jepson Flora: Amelanchier alnifolia
- "saskatoon". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005.
- University of Maine: Amelanchier list of taxa
- University of Maine: Amelanchier alnifolia var. alnifolia
- Jepson Flora: Amelanchier alnifolia var. pumila
- University of Maine: Amelanchier alnifolia var. pumila
- Jepson Flora: Amelanchier alnifolia var. semiintegrifolia
- University of Maine: Amelanchier alnifolia var. semiintegrifolia
- Introduction to Saskatoons
- St-Pierre, R. G. Growing Saskatoons - A Manual For Orchardists
- Mazza, G (2005). "Compositional and functional properties of saskatoon berry and blueberry". Int. J. Fruit Sci. 5 (3): 99–118.
- Mazza G, Davidson CG. Saskatoon berry: A fruit crop for the prairies. p. 516-519. In: J. Janick and J.E. Simon (eds.), New crops. Wiley, New York, 1993.
- Government of Manitoba - Ministry of Agriculture: Saskatoon Berries
- St-Pierre RG. Growing saskatoons - a manual for orchardists
- British Food Standards Authority: Saskatoon Berries
- Johnson, B. We banned a berry – and it took Brussels to stop us being so silly. The Telegraph 2004-12-23
- Anon. Britain plucks saskatoon berries from store shelves. CBC News 2004-06-07.
- Leeder, Jessica. Saskatchewan couple betting the farm on the Saskatoon berry's super powers. The Globe and Mail. 16 September 2011.
- Ron Smith. "Juneberries". Retrieved 2010-06-21. "Q: I have a question about Juneberry shrub trees. When the Juneberries start to ripen, they get red in color and then something starts to grow on them, almost like a fungus. What could it be and what can be done? A: It is a fungus, most likely cedar-apple rust. Juneberry is in the same family as the apple (rose), so it is subject to some of the same diseases. The easiest way to control this is to find the offending juniper and remove it or pick off and destroy the orange, golf ball-sized fruit that is present before sporogenesis has a chance to begin."
- Ozga (2007). "Characterization of cyanidin- and quercetin-derived flavonoids and other phenolics in mature saskatoon fruits (Amelanchier alnifolia Nutt.)". Journal of Agricultural and Food Chemistry 55 (25): 10414–24. doi:10.1021/jf072949b. PMID 17994693.
- Hosseinian (2007). "Saskatoon and wild blueberries have higher anthocyanin contents than other Manitoba berries". Journal of Agricultural and Food Chemistry 55 (26): 10832–8. doi:10.1021/jf072529m. PMID 18052240.
- Bakowska-barczak (2007). "Survey of bioactive components in Western Canadian berries". Canadian Journal of Physiology and Pharmacology 85 (11): 1139–52. doi:10.1139/y07-102. PMID 18066116.
- Adhikari (2005). "Quantification and characterisation of cyclo-oxygenase and lipid peroxidation inhibitory anthocyanins in fruits of Amelanchier". Phytochemical analysis 16 (3): 175–80. PMID 15997850.