An erect annual or biennial, with multicellular glandular hairs herb, 15-18 cm high. Radical and the few lower caline leaves elliptic to broadly ovate, 1-2 cm long, 7-12 mm wide, rounded at base , the margins toothed, the petioles 1-2 cm long,; upperleaves sessile, ovate-obicular, the margins toothed, with reddish brown spot on both surfaces. Flowers axillary, 4-5 mm across, white, short pedicellate; calyx 2-3 mm long. Capsules globose, with many small seeds.
TAIPEI: Chihsingshan, Chuang 2773; Wutsushan, Nakamura 4059. TAOYUAN: Pintintahu, Simada 1148; Taoyuan, Sasaki s. n. 1909.
Distributed in Southern Japan, the Ryukyus, mainland China, and Taiwan. Fields and low altitudes in the northern part of the island.
Phenology: biennial, annual
Life form: herb
Root: rooting at node or not: not rooting at node
Stem: absent
Stem: type: erect
Stem: indumentum: hairy
Leaf: position: cauline, basal
Phyllotaxy: alternate, radical
Leaf: petiole: petiolate, sessile
Leaf: petiole length (mm): 10-20
Leaf: blade shape: ovate
Leaf: blade apex: acute
Leaf: blade base: rounded
Leaf: blade margin: toothed
Leaf: blade surface: pubscent, dotted
Leaf: blade texture: herbaceous
Leaf: blade length (mm): 10-30
Leaf: blade width (mm): 7-15
Inflorescence: position: axillary
Scape: absent
Peduncle: length (mm): 5-10
Bract: absent
Calyx: shape: 5-parted
Sepal: shape: oblong
Sepal: margin: entire
Sepal: length (mm): 2-3
Sepal: width (mm): 0.7-0.8
Corolla: color: white
Corolla: shape: broadly campanulate
Lobe: margin: entire
Lobe: length (mm): 2-3
Lobe: width (mm): 2-3
Filament fused into a ring or not: filament free
Filament inserted position: throat of corolla lobe
Filament: indumentum: glabrous
Filament and anther relative length: filament about equal to anther
Stamens protruding from corolla or not: Stamens not protuding from corolla
Capsule: dehiscence type: longitudinal
Distribution: low elevation cultivated field
