Oak

Common · Quercus spp

Healing · Alchemical · Magical · Nutritional · Defensive

Terrain Forest, Hills, Swamp/Marsh

Description

The oak is a large deciduous tree with a powerful trunk and a wide, spreading crown. The leaves are dense, deeply lobed, and dark green. The flowers are inconspicuous, unisexual, and gathered in catkins. The fruits are acorns, sitting singly or in clusters on short stalks. Oaks are notable for their longevity and can live for several hundred years.

Location and Habitat

Oaks are found in forests, forest-steppes, and parks across Europe, the Caucasus, Asia Minor, North America, and the Far East. They prefer fertile, well-moistened soils and well-lit areas.

Rarity and Availability

Oak is a widespread tree, not considered a rare species, and is easily found in nature. Many species of oak are protected as natural monuments due to their age and size.

Effects and Uses

In medical practice, the bark from young shoots is highly valued due to its high content of tannins (10–20%). What are these substances? Tannins are a group of plantderived compounds capable of tanning leather. The term "tanning" originally referred to the process of obtaining elastic and waterproof leather from hides using oak bark, making it suitable for producing shoes and other items. Such treated leathers were widely used in ancient Egypt and Greece. Tannins were also used in medicine because they have a unique property—they cause partial coagulation of proteins in mucus and tissue exudates, creating a dense protective layer on wound surfaces. This layer protects sensitive nerve endings and underlying tissue layers from local irritation. It slows down the inflammatory process and reduces pain.

Harvesting & Preparation

• Harvesting Oak Bark. Obtaining bark from young shoots without damaging the tree’s natural healing powers calls for a DC 12 Wisdom (Nature) check or Wisdom (herbalism kit) check. On a success, you gather 1d4 portions of usable oak bark. On a failure, half the portions are ruined or spoil quickly.
• Collecting Acorns. Gathering usable acorns demands a DC 10 Wisdom (Survival) check to inspect for rot or infestation. On a success, you glean 1d6 acorns (good quality).

Items & Effects

• Tannin Poultice. Using the high tannin content, healers can create a protective salve. Creation: Requires 2 hours, a small mortar and pestle or herbalism kit, and 1 or 2 portions of oak bark. A DC 13 Wisdom (herbalism kit) check yields 1d2 Tannin Poultices. Use (Applied Externally): Coagulating Shield: Over the course of 1 minute, apply the poultice to an open wound. The target gains 1d4 + 1 temporary hit points, which last for 1 hour. Pain Reduction: The target also has advantage on saving throws against diseases or infections resulting from that wound, such as those caused by beast attacks or filthy environments.
• Acorn Coffee (Roasted Acorn Brew). Legends say roasting acorns removes their harmful tannins, leaving a sustaining “coffee” for travelers.
  • Creation. Requires 1 hour to roast and grind enough good acorns. A DC 10 Wisdom (cook’s utensils) check or Wisdom (herbalism kit) check yields enough “coffee” for 1d4 servings.
  • Energizing Brew. Drinking 1 serving as part of a short rest grants one of the following (player’s choice):
    • Remove 1 level of exhaustion (if you have any).
    • Gain advantage on Constitution checks for a number of hours equal to your Constitution modifier (minimum 1).
• Oakheart Draught. Some druids and alchemists speak of harnessing the raw strength of ancient oaks into a single infused elixir.
  • Creation. Requires at least 3 doses of oak bark from a tree 100+ years old, plus special reagents worth 100 gp. A DC 15 Wisdom (herbalism kit) check or Intelligence (Arcana) check is needed to succeed. Each successful batch yields a single dose of Oakheart Draught. On a failure, the materials are lost.
  • Use (Ingested).
    • Strength of the Ages. For 1 hour, your Strength score increases by 2, to a maximum of 22.
    • Enduring Roots. During this hour, you also count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

Lore

According to one version, the Latin name for oak—Quercus—originated from Celtic words meaning "red" and "tree," and can be translated as "red tree" or "beautiful tree."

In many cultures, the oak was considered the most beautiful and oldest tree on Earth. For instance, the Greeks believed that the oak appeared on Earth before all other trees and provided people with their primary food source. Pliny the Elder wrote about it: "... oaks, intertwined through the ages, as old as the universe itself, they astonish us with their almost immortal fate, as the greatest wonder of the world." Such a statement is not unfounded—oaks are known to have reached 700–800 years of age.

In ancient Greece, the oak was dedicated to the god of the sun, science, and art—Apollo, and in ancient Rome—to Jupiter. An oak branch symbolized power. In one old manuscript, a note was preserved: "There, gray-haired priestesses foretold fate by the rustling of the leaves of this sacred oak." It was believed that various spirits and entities inhabited the branches of old oaks. Mermaids and witches loved to swing on the branches of the oak.

From Witch’s Herbs 5E, p. 70 · Fern Flower Press