目前为止，中国西南野生生物种质资源库共保藏该物种: 种子4份; DNA材料16份; DNA8份;

• 科:木犀科    Oleaceae
• 属:陉属   Fraxinus
• 种:白枪杆   Fraxinus malacophylla

3. Fraxinus malacophylla Hemsley, Hooker's Icon. Pl. 26: t. 2598. 1899. 白枪杆 bai qiang gan Fraxinus retusifoliolata Feng ex P. Y. Bai.Trees to ca. 10 m. Branchlets ridged, 4-angled when young, brown tomentose; buds naked. Leaves to ca. 25 cm; petiole 2-5 cm; axis densely brown tomentose; leaflets 9-15, sessile or subsessile; leaflet blade elliptic to lanceolate-elliptic, (1.5-)3-8(-10) × (1-)1.5-4 cm, thin leathery, adaxially densely brown tomentose to glabrescent, abaxially densely pale villous to yellow tomentose, especially denser along veins and margin, base cuneate to broadly cuneate, rarely rounded, oblique, margin entire, apex acute or obtuse to retuse; primary veins 7-10 on each side of midrib. Panicles terminal or lateral, ca. 16 cm, many flowered; bracts linear, 2-3 mm. Flowers bisexual, appearing after leaves. Pedicel ca. 3 mm. Calyx cupu-lar, ca. 1 mm, apically truncate or with broadly deltate teeth. Corolla white; lobes linear, ca. 3 mm. Stamens scarcely exceeding corolla lobes. Samara narrowly spatulate, 3-4 cm × 6-7 mm; wing decurrent to about middle of nutlet. Fl. Jun, fr. Sep-Oct.Secondary forests and dry rocky slopes in calcareous montane regions; 500-1900 m. Guangxi, Yunnan [Thailand]【引自：Flora of China】

落叶乔木，高约10米；树皮灰白色。芽裸露，密被锈色糠秕状毛和短茸毛。幼枝稍扁，近四棱形，密被褐色茸毛，小枝灰褐色，具纵棱，疏被柔毛和短茸毛，皮孔细小，稀疏散生。羽状复叶长约25厘米；叶柄长2-4厘米，基部不增厚；叶轴上面具窄沟，均密被棕色茸毛；小叶9-15枚，革质，椭圆形至披针状椭圆形，长3-8（-10）厘米，宽1.5-4厘米，先端急尖或钝，基部楔形至阔楔形，稀呈圆形，两侧不等大，近全缘，叶缘略反卷，上面黄绿色，密被棕色茸毛，下面色较淡，密被白色柔毛和黄色绒毛，脉上与叶缘尤密，中脉在上面凹入，下面凸起，侧脉7-10对，上面凹入，下面凸起，细脉不明显；小叶近无柄。圆锥花序生于当年生枝端或上部叶腋，长约16厘米，花密集于各分枝上半部；花序梗长；苞片线形，长2-3毫米；花梗细，长约3毫米，与苞片均密被黄色茸毛；花萼杯状，长约1毫米，顶端截平或浅裂而呈阔三角形，微被毛；花冠白色，裂片线形，长约3毫米；两性花具雄蕊2枚，伸出花冠之外，花药大，长3-3.5毫米，花丝短，雌蕊长约2.5毫米，柱头棍棒状，2浅裂、。翅果匙形，长3-4厘米，宽6-7毫米，中上部最宽，钝头或急尖，稀为凹头，翅甚扁平，下延至坚果中部以下，坚果长约1.2厘米，凸起，与果翅区别分明。花期6月，果期9-10月。 【引自：中国植物志】