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Vegetables

Water Spinach

A common Hong Kong leafy vegetable with long hollow stems and pointed or arrow-shaped green leaves.

Identification illustration; actual appearance may vary.
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3 identity clues

  • Long stems with a hollow tube
  • Pointed or arrow-shaped leaves
  • Visible nodes where leaf stalks emerge
Reading language:
English
Names in other languages
繁體中文
通菜
English
Water Spinach
Bahasa Indonesia
Kangkung (通菜)
Tagalog
Kangkong / Water Spinach (通菜)

Name in Cantonese (Jyutping): tung1 coi3

What is it?

Water spinach is the official Hong Kong market English name for 通菜. It is also called ong choy, morning glory, swamp cabbage or kangkung.

How to identify it

Look for long tender stems with a clearly hollow centre, visible nodes and pointed green leaves. It is not ordinary spinach despite the English name.

Common confusion

This item

Water Spinach

  • Long stems with a hollow tube
  • Pointed or arrow-shaped leaves
  • Visible nodes where leaf stalks emerge
  • Soft oval or broad leaves
  • Tender stems normally solid rather than hollow
  • Green and red-veined varieties both occur

Compare

Watercress

  • Many slender stems
  • Small rounded leaflets along the stems
  • Usually sold in bunches
How to identify it

Water spinach has long hollow stems; Chinese amaranth normally has solid stems and different leaf veins.

Chinese Amaranth

Fresh Chinese amaranth showing soft oval green leaves, clear veins and tender solid stems
Identification illustration; actual appearance may vary.

Watercress

Fresh bunch of watercress with slender stems and many small rounded green leaflets
Identification illustration; actual appearance may vary.

Common Hong Kong household uses

Commonly stir-fried with garlic, fermented bean curd or shrimp paste.

Choosing & preparing

Remove tough stems and yellow leaves, inspect each section, wash thoroughly under running water and drain before quick cooking.

Storage

Keep unwashed and dry in the refrigerator and use quickly. Wrap cut portions and refrigerate.

Helper tip

Chinese amaranth normally has solid stems rather than a hollow tube. Break one stem or ask the employer if unsure.

What Ma’am or Sir may say

今晚用腐乳炒通菜。

The employer wants water spinach stir-fried with fermented bean curd, not ordinary spinach.

Useful market phrase

唔該要一斤嫩通菜。

Meaning: One catty (斤) of tender Water Spinach, please.

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Water Spinach

Fresh water spinach showing long hollow green stems, visible nodes and pointed leaves
Identification illustration; actual appearance may vary.

通菜

Water Spinach

Fresh water spinach showing long hollow green stems, visible nodes and pointed leaves
Identification illustration; actual appearance may vary.