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Celtuce stems & heads

Celtuce (Lactuca sativa var. asparagina, augustana, or angustata), also called stem lettuce, celery lettuce, asparagus lettuce, or Chinese lettuce, IPA (UK,US) /ˈsɛlt.əs/, is a cultivar of lettuce grown primarily for its thick stem, used as a vegetable. It is especially popular in China, and is called wosun (Chinese: ; pinyin: wōsŭn) or woju (Chinese: ; pinyin: wōjù) (although the latter name may also be used to mean lettuce in general).

Celtuce (foreground) for sale in Lhasa
Celtuce, raw
Nutritional value per 100 g (3.5 oz)
Energy 75 kJ (18 kcal)
Carbohydrates 3.65 g
- Dietary fiber 1.7 g
Fat 0.3 g
Protein 0.85 g
Vitamin A equiv. 175 μg (22%)
Thiamine (vit. B1) 0.055 mg (5%)
Riboflavin (vit. B2) 0.07 mg (6%)
Niacin (vit. B3) 0.55 mg (4%)
Pantothenic acid (B5) 0.183 mg (4%)
Vitamin B6 0.05 mg (4%)
Folate (vit. B9) 46 μg (12%)
Vitamin C 19.5 mg (23%)
Calcium 39 mg (4%)
Iron 0.55 mg (4%)
Magnesium 28 mg (8%)
Manganese 0.688 mg (33%)
Phosphorus 39 mg (6%)
Potassium 330 mg (7%)
Sodium 11 mg (1%)
Zinc 0.27 mg (3%)
Link to USDA Database entry
Percentages are roughly approximated
using US recommendations for adults.
Source: USDA Nutrient Database

The stem is usually harvested at a length of around 15–20 cm and a diameter of around 3–4 cm. It is crisp, moist, and mildly flavored, and typically prepared by slicing and then stir frying with more strongly flavored ingredients.

Lechuga china o wosun
Lechuga china o wosun (2)