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小石积(Osteomeles subrotunda),属蔷薇科小石积属,我国有三种;本种在粤北仅见小片散生于仁化县丹霞山附近的丹霞地貌区内.常绿丛生灌木,高可达3米,小枝细弱稠密,自然弯垂;奇数羽状复叶,总长5～7cm,叶轴有狭翅;小叶5～13对对生,椭圆形,近无柄,长0.5～O.7 cm,宽0.2～0.4cm,叶端急尖或微凹,基部宽楔形,全缘,主脉在背部隆起,两面被疏柔毛.顶生伞房花序具花3—5朵,4—5月开花;花径约1—1.5cm,总梗,花梗及花萼均被灰白色柔毛,花梗长3—8毫米,萼片反卷,花瓣5枚,白色,圆匙形,雄蕊17—20枚,花柱5,子房下位.梨果卵形,黑色坚硬;果期6—7月.
Small stone plot (Osteomeles subrotunda), belongs to the Rosaceae small stone accumulation, there are three kinds of our country; this species is only seen in northern Guangdong small pieces scattered in Renxia Danxia Mountain near the Danxia landform area. Evergreen tufted shrubs, up to 3 meters , Branchlets thick and dense, naturally sagging; odd pinnately compound leaves, total length 5 ~ 7cm, leaf shaft narrowly winged; leaflets 5 to 13 pairs of students, oval, nearly sessile, 0.5 ~ O. 7 cm wide 0.2-0.4 cm, leaf tip acute or slightly concave, base broadly cuneate, entire, main veins raised on back, both surfaces pubescent. Tops with corymbs 3-5, 4-5 months; Flower diameter of about 1-1.5cm, the total stems, peduncles and calyx are gray-white pilose, pedicel 3-8 mm long, sepals rewound, petals 5, white, round spoon-shaped, stamens 17-20, style 5, Ovary inferior. Pomes ovate, black hard; fruit 6-7 months.