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|Variety:||B. rapa var. perviridis|
|Brassica rapa var. perviridis
|Nutritional value per 100 g (3.5 oz)|
|Energy||92 kJ (22 kcal)|
|Dietary fiber||2.8 g|
|Vitamin A equiv.||
|Pantothenic acid (B5)||
|Percentages are roughly approximated using US recommendations for adults.
Source: USDA Nutrient Database
Komatsuna (コマツナ（小松菜）) or Japanese mustard spinach (Brassica rapa var. perviridis) is a leaf vegetable. It is a variety of Brassica rapa, the plant species that yields the turnip, mizuna, napa cabbage, and rapini. It is grown commercially in Japan and Taiwan. The name 'komatsuna' is from the Japanese komatsuna (小松菜, コマツナ), 'greens of Komatsu', a reference to Komatsugawa village where it was heavily grown during the Edo period. It is stir-fried, pickled, boiled, and added to soups or used fresh in salads. It is an excellent source of calcium.
The leaves of komatsuna may be eaten at any stage of their growth. In a mature plant they are dark green with slender light green stalks, around 30 centimeters (12") long and 18 cm (7") wide. It is most often grown in the spring and autumn, as it cannot endure extreme heat or cold for more than a short time.
The plant is also used for fodder in some Asian countries.
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