herbs perennial. stems erect, 25-60 cm tall, angles slightly winged, glabrous except nodes sometimes puberulent, much branched.

corolla white, 4-lobed, exserted from calyx, tube ca. 4 mm, outside sparsely glandular, inside puberulent, yellowish villous in throat.

花冠白色，4裂，从花萼外露，筒部约4毫米，具腺的外面疏生，在被微柔毛，淡黄的具长柔毛在喉内里面。

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leaf blade oblong, abaxially glabrous except for sparsely puberulent veins.

除了疏生微柔毛的脉的叶片长圆形，背面无毛。

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petals yellowish, square or oblong, with 3 veins, brown-yellow and conspicuous, especially costa, abaxially puberulent.

淡黄的花瓣，正方形或长圆形，3脉的具，棕色黄和明显，特别是中脉，被微柔毛。

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fruit glabrous, rarely puberulent when young.

无毛，很少被微柔毛的果幼时。

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stems 1, erect, ca. 1 m tall, simple or apically branched, glabrous or puberulent, with a ring at each node connecting petiole bases.

茎1，直立，1米高的约，单或顶部分枝，无毛或具微柔毛，具一戒指在连结叶柄基部的每节。

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calyx ca. 4 mm, minutely stellate puberulent, lobes triangular, acute to slightly acuminate.

花萼长约4毫米，微小的被微柔毛，三角形的裂片，锐尖对稍渐尖。

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calyx lobes broadly ovate, ca. 1 mm, outside puberulent, margin membranous and ciliate, apex rounded.

宽卵形的萼裂片，约1毫米，外面被微柔毛，边缘膜质和具缘毛，先端圆形。

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petals ca. as long as sepals, both surfaces puberulent, large toothed at apices.

花瓣与萼片近等长，两面被微柔毛，大的齿在顶端。

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stem, petiole, leaf blade veins abaxially, and base of female peduncle minutely puberulent when young.

茎，叶柄，背面的叶片脉，并且雌花序梗稍被微柔毛幼时的基部。

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stem twining to left, brown puberulent when young, glabrescent.

茎向左缠绕，棕色幼时，后脱落。

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young branches densely puberulent, older ones gray-brown, lenticellate and glabrous.

幼枝密被被微柔毛，老的灰棕色，具皮孔和无毛。

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upper lip rounded, lobes outside glandular and puberulent.

上唇绕行，在具腺和被微柔毛外边的裂片。

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stem twining to left, minutely yellow puberulent, prickly.

茎向左缠绕，微小的黄被微柔毛，具皮刺。

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fruit a capsule, nearly globose, locules easily freed from each other, stellate puberulent.

果一蒴果，近球状，子房室容易彼此离生的，星状被微柔毛。

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stems to more than 40 cm, simple, glabrescent proximally, puberulent distally with hooked hairs.

茎可达超过40厘米的，单一，下部毛后脱落，上部被微柔毛具钩毛。

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leaf blade ovate, secondary veins adaxially visible to obscure; sepals inside white puberulent.

对不明显可见的正面的叶片卵形，次脉；萼片里面白色被微柔毛。

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young branches and leaf blade glabrous or leaf blade only puberulent along basal part of midrib adaxially.

无毛的幼枝和叶片或叶片只被微柔毛沿着基部中脉深裂正面。

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corolla rose red, slightly longer than calyx, 2-lipped, outside puberulent and glandular, inside villous.

花冠玫瑰红，稍长于花萼，二唇形，外面被微柔毛和具腺，在具长柔毛里面。

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terminal buds conical, thin, puberulent or glabrescent, apically acute, with ciliate bud scales.

顶芽圆锥状，薄，被微柔毛或脱落无毛，顶部锐尖，具具缘毛的芽鳞。

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stems filiform, stoloniferous, to 25 cm, glabrous or sparsely appressed puberulent, rooting at nodes.

茎丝状，有匍匐茎的，达25厘米的是，无毛或疏生贴伏，节上生根。

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