1. Plants having long green or reddish acidic leafstalks growing in basal clumps; stems (and only the stems) are edible when cooked; leaves are poisonous
   "We harvested the rhubarb plant's stems to make a delicious pie";
   - rhubarb

Derived forms: rhubarb plants

Type of: herb, herbaceous plant

Part of: genus Rheum, Rheum