Adiantum monochlamys, commonly known as One-flower maidenhair, is a perennial herbaceous fern native to the understory of temperate forests, often found in shaded, moist, and rocky areas along streams and ravines in Japan, Korea, Taiwan, and China. This fern typically grows slowly to a height and width of 0.5-1 feet (0.15-0.3 meters), featuring delicate, fan-shaped fronds with a light and airy texture. The fronds are supported by slender, black stems that contrast strikingly with the bright green leaflets. While it does produce spores, it does not have true flowers; the term "inconspicuous flowers" is a misnomer as ferns reproduce via spores, not flowers. Flowering plants and ferns are distinct in their reproductive methods.

One-flower maidenhair is valued for its graceful appearance and is often used in shaded garden areas, rock gardens, and as a ground cover in woodland gardens. It requires consistent moisture and is sensitive to drying out, making it important to maintain evenly moist soil conditions. It thrives in part shade, preferring a cool environment with medium to high humidity. This fern is not drought-tolerant and benefits from being planted in well-draining, loamy soils rich in organic matter. It is generally free from serious pests and diseases, but can suffer from root rot if overwatered or planted in poorly draining soils.CC BY-SA 4.0