An annual herb; stolon short; stems erect, angular, 15-80 cm tall, sparsely branched in upper parts, with minutely glandular-hairs. Leaves alternate, petiolate, elliptical, lanceolate to narrowly ovate, 5-10 cm long, 1-3 cm wide, acuminate at apex, attenuate or acuminate at base, entire, green ,palerand with minute dark brown spots beneath. Racemes terminal, to 30 cm long, loosely many-flowered, the bracts acicular, filiform, the pedicels 1-1.5 cm long; flowers white to pinkish, 5-6 mm long; calyx cleft almost to base, the segments lanceolate, acuminate, 3-4 mm long, with glandular dots arranged in line; corolla-lobes suberect, the apex rounded; stamens exserted, filaments inserted on the corolla, with minute glandular hair, 3-3.5 mm long, anthers about 1 mm long; ovary globose, style 3.5-4.5 mm long. Capsules globose, the pistil persistent.
TAIPEI: Nankang, Peng 10442; Shuangkeng, Wang W00826. ILAN: Tali, Yang 2726; Paling, Kuoh 2417. TAOYUAN: Hushing, Yang 2675, Lin 753. HSINCHU: Wufeng, Peng 9384; Chienshih, Kao 2094. MIAOLI: Shihtang, Peng 13930; Kuanwu Wang 8282. NANTOU: Tungpu, Peng 10933; Shenmu, Peng 10877. TAITUNG: Pailu, Kao 9666; Chiapoutai, Huang 595. HUALIEN: Chingshui, Shimizu & Kao 11600; Tienhsian, Chuang & Kao 4410.
Distributed in Japan, Korea, the Ryukyus, Taiwan, southern Asia and Australia. Taiwan, at low to medium altitudes.
Phenology: annual
Life form: herb
Root: rooting at node or not: not rooting at node
Stem: present
Stem: type: erect
Stem: shape: angled
Stem: indumentum: minute glandular hairs
Leaf: position: cauline
Phyllotaxy: alternate
Leaf: petiole: petiolate
Leaf: petiole length (mm): 10-30
Leaf: blade shape: elliptic, lanceolante
Leaf: blade apex: acuminate
Leaf: blade base: attenuate, acuminate
Leaf: blade margin: entire
Leaf: blade surface: dotted
Leaf: blade texture: herbaceous
Leaf: blade length (mm): 50-150
Leaf: blade width (mm): 10-40
Inflorescence: raceme
Inflorescence: position: terminal
Scape: absent
Peduncle: length (mm): 6-15
Bract: present
Bract: length (mm): 3-7
Bract: width (mm): 0
Calyx: shape: 5-parted
Sepal: shape: lanceolate
Sepal: margin: entire
Sepal: length (mm): 2.5-4
Sepal: width (mm): 0.5-1.5
Corolla: color: white, pinkish
Corolla: shape: rotate
Lobe: margin: entire
Lobe: length (mm): 2-2.5
Lobe: width (mm): 1-1.5
Filament fused into a ring or not: filament free
Filament inserted position: base of corolla lobe
Filament: indumentum: minute glandular hairs
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: low elevation cultivated field, mid elevation
