12. Dendrobium thyrsiflorum H. G. Reichenbach ex André, Ill. Hort. 22: 88. 1875. 球花石斛 qiu hua shi hu Callista thyrsiflora (H. G. Reichenbach ex André) M. A. Clements; Dendrobium densiflorum Wallich var. alboluteum J. D. Hooker; D. galliceanum Linden.Stems erect or ascending, cylindric, 12-46 cm, stout, 7-16 mm in diam., base contracted and narrowly cylindric, with several nodes, with several longitudinal ridges, yellowish brown and glossy. Leaves 3 or 4 on upper part of stem, alternate, oblanceolate, 9-16 × 2.4-5 cm, leathery, base not decurrent into clasping sheaths, but narrowed into a stalk ca. 6 mm, apex acute. Inflorescence arising laterally on previous year’s leafy stem, pendulous, 10-16 cm, densely many flowered; peduncle with 3 or 4 papery basal sheaths; floral bracts pale white, obovate, 10-15 × 5-13(or more) mm, papery, with several veins, not convolute when dry, apex bluntly rounded. Pedicel and ovary with pale white stripes tinged with purple, 2.5-3 cm. Flowers spreading, thin; sepals and petals white, sometimes flushed pink especially abaxially, lip golden yellow, column white, foot pale yellow, anther cap white. Dorsal sepal ovate, ca. 15 × 8 mm, 5-veined, entire, obtuse; lateral sepals slightly obliquely ovate-lanceolate, ca. 17 × 7 mm, 5-veined, entire, obtuse; mentum subglobose, ca. 4 mm wide. Petals suborbicular, ca. 14 × 12 mm, 7-veined with many secondary veins, base with claw ca. 2 mm, margin irregularly finely toothed above base, apex bluntly rounded; lip suborbicular to triangular, ca. 15 × 19 mm, abaxially sparsely pubescent, adaxially densely pubescent, bluntly rounded, base with claw ca. 3 mm; claw ornamented with a ligulate structure; column foot ca. 4 mm; anther cap compressed, conic.Epiphytic on tree trunks in mountain forests; 1100-1800 m. SE Yunnan [NE India, Laos, Myanmar, N Thailand, Vietnam].【引自:Flora of China】
茎直立或斜立,圆柱形,粗状,长12-46厘米,粗7-16毫米,基部收狭为细圆柱形,不分枝,具数节,黄褐色并且具光泽,有数条纵棱。叶3-4枚互生于茎的上端,革质,长圆形或长圆状披针形,长9-16厘米,宽2.4-5厘米,先端急尖,基部不下延为抱茎的鞘,但收狭为长约6毫米的柄。总状花序侧生于带有叶的老茎上端,下垂,长10-16厘米,密生许多花,花序柄基部被3-4枚纸质鞘;花苞片浅白色,纸质,倒卵形,长10-15毫米,宽5-13毫米,先端圆钝,具数条脉,干后不席卷;花梗和子房浅白色带紫色条纹,长2.5-3厘米;花开展,质地薄,萼片和花瓣白色;中萼片卵形,长约1.5厘米,宽8毫米,先端钝,全缘,具5条脉;侧萼片稍斜卵状披针形,长1.7厘米,宽7毫米,先端钝,全缘,具5条脉;萼囊近球形,宽约4毫米;花瓣近圆形,长14毫米,宽12毫米,先端圆钝,基部具长约2毫米的爪,具7条脉和许多支脉,基部以上边缘具不整齐的细齿;唇瓣金黄色,半圆状三角形,长15毫米,宽19毫米,先端圆钝,基部具长约3毫米的爪,上面密布短绒毛,背面疏被短绒毛;爪的前方具1枚倒向的舌状物;蕊柱白色,长4毫米;蕊柱足淡黄色,长4毫米;药帽白色,前后压扁的圆锥形。花期4-5月。 【引自:中国植物志】
编号 | 保藏类型 | 保护级别 | 份数 | 数据来源 |
---|---|---|---|---|
IVB0153 | 离体培养物 | 国家保护植物 | 21 | 离体材料库 |
IVB0154 | 离体培养物 | 国家保护植物 | 20 | 离体材料库 |
IVB2147 | 离体培养物 | 具有较高的园艺价值 | 10 | 离体材料库 |