How to identify common evergreen shrubs

Evergreen shrubs form the backbone of most home landscapes -- they provide winter structure, year-round screening, and a foil for seasonal plants. But they are also frequently misidentified, which matters for pruning timing, pest management, and toxicity awareness (several common evergreen shrubs.

Evergreen shrubs form the backbone of most home landscapes — they provide winter structure, year-round screening, and a foil for seasonal plants. But they are also frequently misidentified, which matters for pruning timing, pest management, and toxicity awareness (several common evergreen shrubs are highly toxic to humans and animals).

Broadleaf evergreens

Boxwood (Buxus spp.)

One of the most common hedge shrubs in eastern North America. Per Clemson HGIC, the key leaf features: small (0.5–1.5 inch), oval to nearly round, opposite, with a slightly notched tip. Leaves are leathery and dark green above, paler below. The entire plant has a characteristic musky, slightly unpleasant scent when foliage is bruised or in warm, humid weather.

Buxus sempervirens (common boxwood) grows 4–20 feet depending on cultivar and pruning; B. microphylla (little-leaf boxwood) stays smaller and is more cold-hardy. Per NC State Extension, boxwood is hardy in zones 5–8 (B. sempervirens) and 4–9 (B. microphylla and cultivars).

Toxicity: All parts toxic to humans, dogs, and horses if ingested. Per NC State Extension, symptoms include nausea, vomiting, convulsions, and in large doses can be fatal to animals.

Holly (Ilex spp.)

Hollies include both evergreen and deciduous species. The common evergreen hollies in landscapes:

**American holly (Ilex opaca):** Large shrub to tree, 15–50 feet. Per NC State Extension, leaves are 2–4 inches, elliptical, with spine-tipped lobes along the margin — the "spiny holly leaf" silhouette most people recognize. Bright red berries persist through winter. Zones 5–9.

**English holly (Ilex aquifolium):** Similar to American holly but with glossier, darker green leaves. Common in the Pacific Northwest, where it has naturalized and is considered invasive in Oregon and Washington per USDA PLANTS Database.

**Inkberry (Ilex glabra): Upright, suckering shrub to 8 feet. Leaves are 1–2 inches, elliptical, without spines** — smooth margins. Produces small, round, black berries. Per NC State Extension, inkberry is the only common native evergreen holly without spiny leaves.

**Winterberry holly (Ilex verticillata):** Deciduous, not evergreen — included here because it is frequently confused with evergreen hollies before leaf drop.

Toxicity: Holly berries are toxic to humans, dogs, and cats. Per NC State Extension, ingestion causes vomiting, diarrhea, and lethargy.

Yew (Taxus spp.)

Per Penn State Extension, yews are identified by their flat, dark green needles (not scale-like, not bundled — single, flat, linear needles), arranged in two rows on either side of the twig in a flat, feather-like spray. Needles are 0.5–1 inch, dark green above, paler below, with a pointed tip that is less sharp than spruce.

The distinctive fruit is a single seed surrounded by a fleshy red aril (cup) — not a cone. The red aril is the only part of the plant that is not highly toxic. Per Penn State Extension, the seed itself and all other parts of yew contain taxine alkaloids that are lethal to horses, cattle, and dogs even in small quantities. Human fatalities are documented.

Common species: Taxus baccata (English yew, zones 5–7), Taxus cuspidata (Japanese yew, zones 4–7), and their hybrid Taxus × media (including 'Hicksii', 'Densiforma'), zones 4–7.

Rhododendron and azalea

Both genera belong to Rhododendron. Per Clemson HGIC, the distinction:

• Rhododendron (in common usage): large-leaved, fully evergreen species. Leaves 3–8 inches, elliptical, often with a rusty-brown scale or felty underside.
• Azalea (in common usage): smaller-leaved; many are deciduous; evergreen azaleas have smaller leaves (1–2 inches).

Leaf arrangement is alternate in both. Per NC State Extension, all Rhododendron have alternate leaves — unlike boxwood's opposite arrangement.

Toxicity: Grayanotoxins in leaves, flowers, and nectar of rhododendron and azalea are toxic to humans, livestock, and pets. Per NC State Extension, all parts should be considered toxic; "mad honey" poisoning can result from honey made by bees foraging on rhododendron flowers.

Leucothoe (Leucothoe fontanesiana, L. axillaris)

An arching, graceful native broadleaf evergreen often used in shaded plantings. Per NC State Extension, leaves are 3–5 inches, lance-shaped, tapering to a sharp tip, with fine serration. Arrangement is alternate. New foliage is often reddish or bronze-tinged; winter color is often purple-burgundy in sun-exposed sites.

Zones 5–8. L. fontanesiana (drooping leucothoe) has arching, drooping stems; L. axillaris (coastal leucothoe) is more upright.

Mountain andromeda / Pieris (Pieris japonica, P. floribunda)

Per Clemson HGIC, Pieris is identified by its whorled to spiral arrangement of elliptical, finely serrated leaves (1.5–3.5 inches) and distinctive pendulous clusters of white, urn-shaped flowers in late winter to early spring. New foliage is often bright red or bronze.

Zones 4–8 (P. japonica). Often confused with leucothoe, but Pieris flowers are distinctly showy and appear very early; leucothoe flowers are small and less conspicuous.

Toxicity: All parts toxic to livestock and humans — contains the same grayanotoxins as rhododendron. Per NC State Extension, Pieris is one of the most toxic landscape plants to grazing animals.