Lyonothamnus is a monotypic genus of trees in the rose family containing the single living species Lyonothamnus floribundus, which is known by the common name Catalina ironwood, and the subspecies L. f. ssp. aspleniifolius and L. f. ssp. floribundus.

The Fernleaf Catalina ironwood is native to San Clemente, Santa Rosa and Santa Cruz Islands off the Coast of Southern California. It grows on north facing slopes and in canyons where it can receive additional moisture from winter rains.

Lyonothamnus floribundus is a tree that is native to California, and endemic (limited) to California. This plant is available commercially. Jepson eFlora. Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025.

2021年1月22日 · Fern-leaf Catalina ironwood is the most commonly grown subspecies and thrives in well-drained soil in coastal and adjacent inland zones throughout the state. It will survive in warmer climates if provided adequate drainage and periodic deep watering.

The beautiful foliage of Catalina ironwood is distinctive enough to warrant a prominent place in a garden with such California compan-ions as Ceanothus and Arctostaphylos. Its beauty was recognized soon after its discovery. Botany professor E.L. Greene of the University of California, Berkeley stated in 1886, “No other

Santa Cruz Island ironwood is found on Santa Cruz (≈ 1000 groves), San Clemente (≈ 200 groves) and Santa Rosa islands (≈ 10 groves) (Bushakra et al., 1998). Santa Catalina Island Ironwood is restricted to Santa Catalina Island.

Lyonothamnus floribundus ssp. floribundus is a tree that is native to California, and endemic (limited) to California. California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere). Commercial availability unknown. Jepson eFlora.

Catalina ironwood thrives in well-drained soil and requires moderate watering. It prefers full sun to partial shade for optimal growth. A special care point is that catalina ironwood benefits from pruning to remove dead or diseased wood, promoting healthy growth.

2024年7月30日 · 🌳 Mimic Catalina Ironwood's native climate with a stable, mild coastal microclimate. 🌞🌱 Sunny spot, acidic soil: Ensure well-draining soil with pH 5.5-6.5. 💧 ️ Water wisely and prune seasonally to maintain health and shape.

Native to the dry, lonely islands off Southern California, Catalina ironwood is like a shaggy, well-worn page out of California history. It's a striking tree with the peely-bark look of an antique relic — perfect for a low-water, natural landscape.