(First upload on September 14 2008. Last on January 25 2020) [ 日本語 | English ]

Vaccinium uliginosum L.

Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Subfamily Vaccinoideae (スノキ亜科)

Vaccinium L. (スノキ)
Kuromamenoki (クロマメノキ, 黒豆ノ木), alpine blueberry
Lifeform: deciduous shrub
Distribution: cool and cold temperate regions, including arctic and Japan (north to central Honshu), in the northen hemisphere
Habitat: shrubby wetland, in particular, bogwetlands (湿原)
Reproduction: vegetatively reproduced after wildfire (火災)
Seed dispersal: animal by indigo blue fruits(popular edible furit in Alaska)
Chromosome number: 2n = 72 (6X)
Varieties (Hultén 1968)
ssp. uliginosum
ssp. microphyllum Lange = V. gaultherioides Bigelow: low-growing; leaves less than 1 cm long, obovate to roundish
ssp. alpinum (Bigelow) Hultén (syn. var. alpinum Bigelow) (ヒメクロマメノキ)
var. salicinum (Cham.) Hultén = V. salicinum Cham.: very narrow, acute leaves
Alaskan tundra: if you are here (= the northern edge of the Brooks Range) in late summer, save some time for picking alpine blueberry, but watch for bears. Without large salmon runs to feed on, bears gorge on berries to outlast winter's fast.

Vaccinium uliginosum in Alaska

var. minus
Cross-pollincation: single shoot should be avoided for fruiting
Soil: acidic such as mixture of peat and Kanuma pumice

[1] in Poker Flat Rsearch Range on August 1, 2007. [2] there were numerous fruits in the summer of 2007, as well as Vaccinium vitis-idaea, but were less in the summer of 2008. The area dominated by Picea mariana was burnt by a wildfire in 2004.

Blueberries in Japan

Japanese names: blueberry (ブルーベリー), ヌマスノキ, アメリカスノキ
Many species in the section Cyanococcus Rydb. of genus Vaccinium producing blue or purple fruits
Lowbush = wild
V. angustifolium Aiton,, non. Benth
V. uliginosum L. (AK)
Rabbiteye = cultivated
V. virgatum
Highbush = cultivated
Northern highbush (< -20°C)
V. corymbosum L., (ヌマスノキ) northern highbush blueberry (cvs. Spartan, Herbert, Berkeley, Blueray and Lateblue)
Southern highbush (< -10°C)
V. formosum Andrews.

Vaccinium corymbosum

blueberry1 blueberry2 blueberry3
[1-3] in a pot placed in front of the office of Shibecha Kyoto University Experimental Forest, on June 26 2019.