《中国植物志》|| 茜草科 RUBIACEAE ||球果亚属 Subgen. Sinospiradiclis Lo ||红叶螺序草 Spiradiclis rubescens Lo

9. 红叶螺序草（植物研究）
Spiradiclis rubescens Lo in Guihaia 11 (2): 101. 1991.
矮小草本，高约6厘米；茎近圆柱状，近无毛，干时紫黑色。叶纸质，长圆形或长圆状卵形，长4-6厘米，宽2-2.3厘米，顶端短尖，钝头，基部阔楔尖或钝，紫红色，两面无毛，但有长缘毛；侧脉每边9-11条，两面稍凸起；托叶三角状阔卵形，长4-5毫米，尾状渐尖。花序顶生，有花3-5朵；花梗短；小苞片线形，长4-6毫米，被疏而长的缘毛；萼管倒卵形，长2毫米，无毛，裂片5，狭披针形，不等长，大的长4-4.5毫米，小的长约3.5毫米，渐尖，被缘毛，裂片间有腺体；花冠红色，高脚碟状漏斗形，长约2.4厘米，冠管外面无毛，宽约1.5毫米，裂片5，卵圆形，长约3.5毫米；雄蕊5，生冠管中部之下，花丝长1.7毫米，花药线形，长2.5毫米；花柱长1.5毫米，柱头2裂，裂片薄，披针形，长约1.5毫米。果未见。花期6月。
我国特有，产于广西田东思林定广；生于荫蔽的岩石上。

《Flora of China》|| Rubiaceae || Spiradiclis ||红叶螺序草 Spiradiclis rubescens

29. Spiradiclis rubescens H. S. Lo, Guihaia. 11: 101. 1991.

红叶螺序草 hong ye luo xu cao

Herbs, apparently ascending, low, ca. 6 cm tall, perhaps annual; stems subglabrous, drying purplish black. Leaf blade drying papery, purplish red, elliptic-oblong or oblong-ovate, 4-6 × 2-2.3 cm, glabrous on both surfaces, base obtuse, margins ciliate, apex acute to obtuse; secondary veins 9-11 pairs; stipules triangular to broadly ovate, 4-5 mm, caudate-acuminate. Inflorescence cymose, 3-5-flowered; bracteoles linear, 4-6 mm, sparsely ciliate; pedicels short. Calyx glabrous; hypanthium portion obovoid, ca. 2 mm; lobes narrowly lanceolate, unequal, larger 4-4.5 mm, smaller ca. 3.5 mm, acuminate, ciliate, with gland in each sinus. Corolla red, slenderly salverform-funnelform, outside glabrous, strongly 5-ribbed; tube ca. 21 mm; lobes ovate, ca. 3.5 mm. Capsules unknown. Fl. Jun.

● On rocks in shady places. Guangxi (Tiandong).

This species is noted for its reddened color when dry.