A prostrate or decubent, few branchedherb; stolons rooting at nodes, 5-20 cm long, pubescent. Basal leaves opposite, sometimes the upper ones alternate, with short petioles, about 2-4 mm long, broadly ovate to cordate, acute at apex, cordate or rotundate at base, 3-10 mm long, 3-7 mm wide, pubescent on both surfaces, the veinlets prominent on under surface, the margins entire. Flowers yellow, axillary, with short pedicels, 3-5 mm long; sepals 5, lanceolate, acuminate at apex, about 5 mm long, 2 mm wide, pubescent, with black-punctate dots, glabrous within; corolla-segments with black-punctate dots, rotundate-obovate; stamens 5, adnate to the corolla tube, filiform, about 4 mm long. Capsules brown, glabrous, pubescent, shorter than the calyx, longitudinally dehiscent.

ILAN: Shenmihu (Secret Lake), Chen 688. NANTOU: Sunlinksea, Peng 6990; Kuankao, Peng 8048. KAOHSIUNG: Kwanshan, Fukuyama s. n. 1935. HUALIEN: Higashinoko, Kudo & Mori 34 (Type in TAI!), Chingshuishan, Leu 1816. TAITUNG: Haitung, Hsiao 1269.

Endemic. In the central high mountains.

Phenology: perennial

Life form: herb

Root: rooting at node or not: rooting at node

Stem: present

Stem: type: decumbent, prostrate at base

Stem: shape: terete

Stem: indumentum: hairy

Leaf: position: cauline

Phyllotaxy: opposite

Leaf: petiole: petiolate

Leaf: petiole length (mm): 2-6

Leaf: blade shape: ovate, cordate

Leaf: blade apex: acute

Leaf: blade base: rounded, cordate

Leaf: blade margin: entire

Leaf: blade surface: pubscent

Leaf: blade texture: herbaceous

Leaf: blade length (mm): 3-10

Leaf: blade width (mm): 3-10

Inflorescence: solitary

Inflorescence: position: axillary

Scape: absent

Peduncle: length (mm): 1.3-4.5

Bract: absent

Calyx: shape: 5-parted

Sepal: shape: lanceolate

Sepal: margin: entire

Sepal: length (mm): 4-5

Sepal: width (mm): 1-2

Corolla: color: yellow

Corolla: shape: rotate

Lobe: margin: entire

Lobe: length (mm): 6-10

Lobe: width (mm): 3-5

Filament fused into a ring or not: filament fuse to a ring

Filament inserted position: base of corolla lobe

Filament: indumentum: glabrous

Filament and anther relative length: filament obviously longer than anther

Stamens protruding from corolla or not: Stamens protuding from corolla

Capsule: dehiscence type: longitudinal

Distribution: mid elevation