Heart-leaved comfrey

About

Heart-leaved comfrey is a plant that you won't see far from the Carpathians: botanists call it a Carpathian subendemic because almost the entire range of the species lies in these mountains and the adjacent foothills. It grows 20–40 cm tall. The basal leaves are large, heart-shaped, on long petioles, and rough from sparse hairs. The stem leaves are smaller, and the upper ones are nearly sessile.

Heart-leaved comfrey blooms from April to June. The flowers are pale yellow, creamy, tubular-bell-shaped, about 1.5 cm long, hanging from a twisted corolla that gradually straightens. They are pollinated by bumblebees with long proboscises.

Due to its creeping rhizome, the plant spreads and forms dense thickets. In the Ukrainian Carpathians, heart-leaved comfrey is common in moist beech and fir-beech forests, in shady ravines, and along stream banks—from the foothills to the upper forest boundary, and sometimes even in crooked forests. Its large leaves are noticeable even in summer when flowering has long passed.

It differs from common comfrey, which grows in moist meadows in the valleys, by its heart-shaped basal leaves, smaller height, and always pale yellow flowers; in common comfrey, the flowers are mostly purple, and the leaves are lanceolate and run down the stem.

All comfreys contain alkaloids that are harmful to the liver, so brewing the leaves or roots as tea is not allowed. The species is not listed in the Red Book of Ukraine, but as a species with a small range, it deserves careful treatment.

Where in the Carpathians

Orange — where naturalists recorded the species (GBIF, CC0/CC BY); a blank area does not mean it is absent.

Countries

Ukraine · Slovakia · Poland · Romania

Mountain ranges

Bieszczady, Chornohora, Maramureș Mountains, Krasna Polonyna, Pokuttia-Bukovina Carpathians, Gorgany, Skole Beskids. In other countries: 🇸🇰 Spiš Magura, 🇵🇱 Pieniny, 🇸🇰 Čergov Mountains, 🇵🇱 Low Beskids, 🇸🇰 Levoča Mountains, 🇵🇱 Sądecki Beskids, 🇷🇴 Bihor-Vlădeasa Mountains

Altitude belts

Foothills (below 600 m) · Beech forests (600–1200 m)

When to see it

From naturalists’ observations in the Carpathians (iNaturalist, research grade): the darker the cell, the more often the species is seen that month.

Safety

Do not consume: comfreys contain alkaloids that are harmful to the liver.

Protection and rules

Not listed in the Red Book of Ukraine. A Carpathian subendemic.

FAQ