优美双盾木Dipelta elegans Batal.

别名：大苞双盾木;

科名：忍冬科 Caprifoliaceae

属名：双盾木属 Dipelta

《中国植物志》第72卷129页
  3. 优美双盾木（中国高等植物图鉴）图版33：9-11
  Dipelta elegans Batal. in Acta Hort. Petrop. 14 (8): 174. 1895; 中国高等植物图鉴4: 302. 1975.
  落叶灌木，高达2米。叶椭圆形，长5-10厘米，宽2-5厘米，顶端长渐尖，基部急尖，全缘或上半部有浅而疏的齿牙，被腺毛，除边缘和下面沿脉稍被柔毛外，两面无毛，具短柄。花单生或由4朵花组成伞房状聚伞花序生于枝顶部叶腋；总花梗比叶柄长；花梗细长，疏被具腺柔毛；苞片条形，着生于花梗基部；小苞片2对，一对狭卵形至披针形，另一对钝卵形，无柄，外被腺毛，贴生于花基部；开花时萼筒下部为小苞片所遮盖，萼檐钟形，疏被长柔毛和腺毛，浅裂，萼齿圆钝，长宽几相等，为萼檐长的1/3-1/2，大小不等；花冠大，宽漏斗形，外面密被短柔毛，筒较花萼长而外露，筒内和下唇喉部有时甚至裂片上均被疏柔毛，筒基部一侧呈浅囊状，喉部突然扩大，二唇形，裂片长为扩大部分的1/3；雄蕊与花柱等长；柱头头状，花柱被疏柔毛。宿存于果实的盾形苞片特大，直径达4厘米。花期5-6月，果熟期9月。
  产甘肃岩昌（西固）、舟曲。生于海拔2000米以上的山坡阔叶林内。模式标本采自甘肃东部。

《Flora of China》 Vol. 19 (2011)
Dipelta elegans  Batalin Trudy Imp. S.-Peterburgsk. Bot. Sada. 14: 174. 1895.
优美双盾木   you mei shuang dun mu
Shrubs, deciduous, to 2 m tall. Leaf blade elliptic, 5-10 × 2-5 cm, glandular hairy, pubescent on veins and margin, base acute to rounded, margin entire or remotely dentate in upper 1/2, apex long acute to long acuminate. Ovaries with 4 bracts; 2 outer bracts larger, peltate, accrescent in fruit and not obscuring calyx at anthesis. Calyx tubular-campanulate, 5-lobed, sparsely hairy; lobes obtuse, ca. 1/3 as long as tube. Corolla bilabiate, densely pubescent, narrowly cylindric at base, flaring and campanulate in upper part; lower lip villous. Ovary pubescent; style pilose to sparsely pubescent; stigmas capitate. Achene with 2 very large persistent peltate bracts to 40 mm wide. Fl. May-Jun, fr. Sep.
● Broad-leaved forests; ca. 2000 m. Gansu, ?Shaanxi, Sichuan.