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。

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。

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。

fruit glabrous, rarely puberulent when young.

无毛，很少被微柔毛的果幼时。

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。

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。

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。

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。

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。

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

茎向左缠绕，棕色幼时，后脱落。

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。

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。

stem twining to left, minutely yellow puberulent, prickly.

茎向左缠绕，微小的黄被微柔毛，具皮刺。

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。

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。

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。

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。

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。

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。

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。