Rubus mesogaeus Focke

Shrubs scandent, 1–4 m tall. Branchlets reddish brown or purplish brown, with soft hairs and sparse, needle-like prickles or nearly unarmed, old branches grayish brown, with sparse prickles broadened basally. Leaves imparipinnate, often 3-foliolate, rarely 5-foliolate; petiole 3–7 cm, petiolule of terminal leaflet 1.5–4 cm, lateral leaflets shortly petiolulate or subsessile, petiolules and rachis pubescent, with sparse, curved minute prickles; stipules linear, to 1.2 cm, pubescent, margin entire; blade of leaflets variable in shape, terminal leaflet broadly rhombic-ovate or elliptic-ovate, base rounded to subcordate, margin often pinnate-lobed, apex acuminate, lateral leaflets obliquely elliptic or ovate, 4–9(–11) × 3–7(–9) cm, abaxially densely gray tomentose, adaxially appressed pubescent or glabrescent, base cuneate to rounded, margin unevenly coarsely serrate, often lobed, apex acute. Inflorescences terminal or axillary, corymbose, (2–)3–4.5 cm, shorter than petiole, several to more than 20-flowered; rachis and pedicels pubescent, with sparse, needle-like prickles; bracts linear, 7–10 mm, pubescent. Pedicel 6–12 mm. Flowers ca. 1 cm or more in diam. Calyx abaxially densely pubescent; sepals often reflexed after anthesis, lanceolate, (4–)5–8 × 3–4 mm, inner sepals with tomentose margin, apex acute to shortly acuminate. Petals white or pink, obovate, suborbicular, or elliptic, 5–6 × 4–5 mm, premorse, base slightly pubescent and shortly clawed. Stamens many, ca. as long as petals. Styles glabrous; ovary pilose. Aggregate fruit purplish black, compressed globose, 6–8 mm in diam., glabrous; pyrenes triangularly ovoid-globose, rugose. Fl. Apr–May, fr. Jul–Aug. 2n = 14*.

Himalaya (Nepal to Bhutan), W. & C. China, Japan, Kuriles.

Chongqing, Gansu, Guizhou, Henan, Hubei, Shaanxi, Sichuan, Taiwan, Xizang, Yunnan [Bhutan, Japan, Nepal, Sikkim, Russia (Sakhalin)].

2200-2800 m

Forests, slopes, montane valleys, river banks, stream sides, near water courses, roadsides; 600--3600 m.

Rubus mesogaeus là loài thực vật có hoa trong họ Hoa hồng. Loài này được Focke miêu tả khoa học đầu tiên năm 1900.

喜阴悬钩子（学名：Rubus mesogaeus）为蔷薇科悬钩子属的植物。分布于尼泊尔、锡金、日本、不丹、台湾岛、萨哈林岛以及中国大陆的湖北、云南、四川、陕西、河南、贵州、甘肃、西藏等地，生长于海拔900米至2,700米的地区，见于山谷林下潮湿处、山坡及沟边冲积台地。

クロイチゴ（黒苺、学名：Rubus mesogaeus）とは、バラ科キイチゴ属に分類される植物の一種。葉は互生で、落葉する。初夏に淡紅色の花を咲かせる。実は最初は赤いが、熟すると黒くなり食べることができる。日本全国の山野に広く分布する。

キイチゴ属の中でも木質化した果床から集合果が分離するラズベリー類であり、果床が木質化せず、集合果もろとも収穫されるブラックベリー類とは、果実の色が類似するものの縁は少々遠い。