No, celery and rhubarb are not botanically related, despite their visual similarities as long, crunchy stalks. Celery (Apium graveolens) belongs to the Apiaceae family, also known as the carrot or parsley family. Rhubarb (Rheum rhabarbarum or Rheum × hybridum) is a member of the Polygonaceae family, often called the buckwheat family.
Many home cooks and gardeners often wonder about the relationship between these two popular stalk vegetables. Understanding their distinct botanical classifications, growth habits, and culinary applications clarifies why they are entirely different plants.
Celery and Rhubarb Belong to Different Botanical Families
Celery and rhubarb originate from separate plant families. This fundamental difference dictates their genetic makeup and characteristics. Their distant relationship means they do not share a common direct ancestor.
Celery: A Member of the Apiaceae Family
Celery (Apium graveolens) is an herbaceous plant. It belongs to the Apiaceae family. This family includes many well-known vegetables and herbs. Carrots, parsley, fennel, and dill are also members.
The Apiaceae family is characterized by its aromatic properties. Many plants in this group have distinctive scents and flavors. Celery has long been cultivated for its fibrous edible stalks, aromatic leaves, and even its seeds.
Rhubarb: A Part of the Polygonaceae Family
Rhubarb (Rheum rhabarbarum) is a hardy perennial vegetable. It is classified under the Polygonaceae family. This family is also known as the buckwheat or knotweed family.
Rhubarb grows from short, thick rhizomes. Its ancestry traces back to regions like western China and Tibet, where it was historically used medicinally.
Distinct Physical Characteristics of Celery and Rhubarb
Despite superficial resemblances, celery and rhubarb possess unique physical attributes. These differences extend beyond their stalks to their leaves and overall plant structure.
- Celery Stalks: Celery stalks are typically light green. They have a crisp, fibrous texture. Celery stalks are often eaten raw.
- Rhubarb Stalks (Petioles): Rhubarb stalks, or petioles, range in color. They can be red, pink, or green. They are fleshy and tart.
- Leaves: Celery leaves are edible. They can be used in salads or as seasoning. Rhubarb leaves are triangular and large. They contain high levels of oxalic acid, making them poisonous.
“Always remove and discard rhubarb leaves. They contain compounds that can be toxic if consumed,” advises Dr. Anna L. Dattilo, a registered dietitian and nutrition expert.
Different Growth Habits and Cultivation Needs
The cultivation of celery and rhubarb also highlights their differences. They have distinct life cycles and environmental preferences.
- Celery: Celery is typically grown as a biennial plant. It is often cultivated annually for its stalks. It requires consistent moisture and cooler temperatures. Celery is harvested by cutting the stalks.
- Rhubarb: Rhubarb is a herbaceous perennial. It grows back year after year from its rhizomes. Rhubarb thrives in cool climates and needs cold winters for optimal growth. Stalks are harvested by pulling and twisting from the base.
Unique Nutritional Profiles and Culinary Uses
Celery and rhubarb offer different nutritional benefits and serve distinct roles in cooking.
Celery: A Savory Vegetable Staple
Celery is primarily a savory vegetable. It has a mild, slightly peppery flavor. It is a low-calorie food. Celery is mostly water, about 95%.
Nutritional highlights for 1 cup (101g) of chopped, raw celery include:
- Calories: 16
- Fiber: 1.6 grams
- Vitamin K: 29.3 mcg (about 24% DV)
- Potassium: 260 mg
- Folate: 36 mcg
Celery is versatile in the kitchen. It is often eaten raw with dips or in salads. It is a foundational ingredient in many cooked dishes. This includes soups, stews, and stir-fries.
Rhubarb: The Tart “Pie Plant”
Rhubarb is known for its intensely tart flavor. It is often cooked with sugar due to its sourness.
Nutritional highlights for 100g of raw rhubarb include:
- Calories: 26
- Fiber: 1.8 grams
- Vitamin K: 29.3 μg (28% DV)
- Calcium: 86 mg (9% DV)
- Potassium: 288 mg (6% DV)
Rhubarb is botanically a vegetable. However, the U.S. Department of Agriculture (USDA) classified it as a fruit in 1947 for tariff purposes. Its primary culinary use is in sweet dishes. These include pies, jams, sauces, and crumbles.
Potential Confusions Between Celery and Rhubarb
The visual similarity of their stalks often leads to confusion. Both plants produce long, rigid stalks. This can easily mislead an untrained eye.
However, mixing them up in a recipe would yield vastly different results. Celery’s mild, savory notes would not substitute for rhubarb’s intense tartness. Furthermore, consuming rhubarb leaves, unlike celery leaves, is dangerous due to their toxicity.
| Feature | Celery | Rhubarb |
|---|---|---|
| Botanical Family | Apiaceae (Carrot/Parsley Family) | Polygonaceae (Buckwheat Family) |
| Scientific Name | Apium graveolens | Rheum rhabarbarum or Rheum x hybridum |
| Edible Parts | Stalks, leaves, seeds | Stalks (petioles) only |
| Leaves | Edible, used as herb or in salads | Toxic due to oxalic acid; never consume |
| Typical Flavor | Mild, slightly peppery, savory | Very tart, sour |
| Primary Culinary Use | Savory dishes, raw snacks, soups, salads | Sweet desserts (pies, jams, sauces), typically cooked with sugar |
| Life Cycle | Biennial (often grown as annual) | Perennial |
| Water Content (approx.) | ~95-96% | ~94% |
FAQs About Celery and Rhubarb
Is rhubarb a fruit or a vegetable?
Rhubarb is botanically a vegetable. However, the U.S. Department of Agriculture (USDA) legally classified it as a fruit in 1947 for tariff purposes. This reclassification was due to its common culinary use in sweet dishes.
Is celery a root vegetable?
No, celery is not a root vegetable. The common stalk celery (Apium graveolens var. dulce) is cultivated for its crisp, edible stems or petioles. A related variety, celeriac (Apium graveolens var. rapaceum), is grown for its large, edible root-like hypocotyl.
Can you eat rhubarb raw like celery?
You can eat rhubarb stalks raw, but it is intensely tart. Many people dip raw rhubarb in sugar or honey to balance its sour taste. Unlike celery, rhubarb leaves are poisonous and should never be eaten.
Are there any plants related to both celery and rhubarb?
No, there are no plants directly related to both celery and rhubarb. Celery is in the Apiaceae family with carrots and parsley. Rhubarb is in the Polygonaceae family with buckwheat and sorrel.
Conclusion
Understanding the distinct botanical classifications of celery and rhubarb helps clarify their differences. While both offer unique culinary experiences, they belong to separate plant families. Recognizing these differences allows for informed gardening and cooking practices.
