蛛网萼Platycrater arguta Sieb. et Zucc.

别名：珠网萼;梅花甜茶;盾儿花;

科名：虎耳草科 Saxifragaceae

属名：蛛网萼属 Platycrater

《中国植物志》第35(1)卷189页
  1. 蛛网萼（植物分类学报）梅花甜茶、盾儿花 图版39：1-6
  Platycrater arguta Sieb. et Zucc. Fl. Jap. 64. tab. 27. 1835; Maxim. in Mem. Acad. Sci. St. Petersb. ser. 7, 10 (16): 5. 1867; Schneid. Ill. Handb. Laubh. 1: 383. fig. 245. a-l. 1905; Engl. in Engl. u. Prantl, Nat. Pfanzenfam. Aufl. 2, 18a: 201. 1930; Chun in Acta Phytotax. Sin. 3 (2): 106. tab. 3. 1954; 中国高等植物图鉴2: 96. 1972; 原色日本植物图鉴 2: 111. pl. 94. fig. 577. 1979. ——P. arguta Sieb. et Zucc. var. typica Schneid. l. c. ——P. serrata (Thunb.) auct. non Ser. : Makino in Bot. Mag. Tokyo 26: 387. 1912.
  落叶灌木，高0.5-3米；茎下部近平卧或匍匐状；小枝灰褐色，几乎无毛，老后树皮呈薄片状剥落。叶膜质至纸质，披针形或椭圆形，长9-15厘米，宽3-6厘米，先端尾状渐尖，基部沿叶柄两侧稍下延成狭楔形，边缘有粗锯齿或小齿，上面散生短粗毛或近无毛，下面疏被短柔毛，脉上的毛稍密，侧脉7-9对，纤细，下面微凸，小脉稀疏网状，下面明显；叶柄长1-7厘米，扁平，上面近基部具浅凹槽。伞房状聚伞花序近无毛；花少数，不育花具细长梗，梗长2-4厘米；萼片3-4，阔卵形，中部以下合生，轮廓三角形或四方形，结果时直径2.5-2.8厘米，先端钝圆，具小突尖，脉纹两面明显；孕性花萼筒陀螺状，长4-5毫米，萼齿4-5，卵状三角形或披针形，长4-5.5毫米，结果时长达7毫米，先端长渐尖；花瓣稍厚，卵形，先端略尖，长约7毫米，稍不等宽；雄蕊极多数，花丝短，花药近圆形，长和宽约1毫米；子房下位；花柱2，细长，结果时长达10毫米，柱头小，乳头状。蒴果倒圆锥状，不连花柱长8-9毫米，顶部宽6-8毫米，具纵条纹；种子暗褐色，椭圆形，不连翅长0.6-0.8毫米，宽0.5毫米，扁平，具细脉纹，两端有长0.3-0.5毫米的薄翅，先端的翅稍长而宽，基部的稍狭而短。花期7月，果期9-10月。
  产安徽（黄山）、浙江（云和、龙泉）、江西（上饶）、福建（武夷山）。生于山谷水旁林下或山坡石旁灌丛中，海拔800-1800米。日本也有分布。

《Flora of China》 Vol. 8 (2001)
Platycrater arguta  Siebold & Zuccarini
蛛网萼   zhu wang e
Shrubs 0.5-3 m tall. Branchlets brown, subglabrous. Petiole 1-7 cm; leaf blade lanceolate to elliptic, 9-15 × 3-6 cm, membranous to papery, both surfaces pubescent or adaxially subglabrous, secondary veins 7-9 on both sides of midvein, slender, abaxially slightly prominent, base narrowly cuneate, slightly decurrent, margin roughly serrate to serrulate. Inflorescence subglabrous; bracts linear. Sterile flowers with sepals 3 or 4, broadly ovate, connate from base to middle and forming a triangle or square 2.5-2.8 cm in diam. in fruit, translucent and thinly net veined. Fertile flowers with calyx tube turbinate, 4-5 mm; teeth 4 or 5, triangular-ovate to narrowly triangular, 4-5.5 mm, to 7 mm in fruit. Petals ovate, ca. 7 mm. Filaments filiform; anthers subglobose, ca. 1 mm in diam. Styles slender, ca. 1 cm in fruit; stigmas small. Capsule 8-9 mm, apically 6-8 mm in diam., striate. Seeds dark brown, compressed ellipsoid, 0.6-0.8 mm, thinly striate, shortly winged. Fl. Jul, fr. Sep-Oct.
Sparse forests or thickets in valleys, stream banks, mountain slopes; 400-1800 m. Anhui, Fujian, Jiangxi, Zhejiang [Japan].
The Chinese plants were described as Platycrater arguta var. sinensis H. Hara (J. Jap. Bot. 61: 70. 1986), which differs from the Japanese plants (var. arguta) in having leaf blades abaxially glabrous or sparsely pubescent with appressed hairs along veins (vs. abaxially densely hairy with spreading hairs along veins), and both calyx and ovary glabrous (see Katsuyama, J. Jap. Bot. 74: 317-319. 1999).