异檐花 yi yan hua

Campanula biflora Ruiz & Pavon, Fl. Peruv. 2: 55. 1799; Asyneuma anhuiense B. A. Shen; Legousia biflora (Ruiz & Pavon) Britton; Pentagonia biflora (Ruiz & Pavon) Kuntze; Specularia biflora (Ruiz & Pavon) Fischer & C. A. Meyer; Triodanis biflora (Ruiz & Pavon) Greene; T. perfoliata var. biflora (Ruiz & Pavon) T. R. Bradley.

Plants glabrous or nearly so throughout except for scabrous angles of stems. Stems simple or branched, slender and often weak, 15-60 cm tall. Leaves ovate to ovate-elliptic or obovate-lanceolate, 6-20 mm, margin entire, or inconspicuously crenate-serrate with very short and broad teeth, base usually rounded, not amplexicaul. Earlier flowers with 3 or 4 ovate to lanceolate calyx lobes; later ones with 4 or 5 longer, lanceolate-subulate calyx lobes. Capsule oblong-cylindric, 6-10 mm, opening by valves close under calyx lobes. Fl. and fr. Apr-Jul. 2n = 28, 56.

Naturalized among grasses and in cracks of concrete; 100-600 m. Anhui (Anqing), Fujian (Jiangle), Taiwan (Xinzhu), Zhejiang (Putuo) [native to North and South America].