Syringantha coulteri (Hook. fil.) T. McDowell

Exostema coulteri Hook, f.; Hemsl. Diag. PI. Nov. 32. 1879
Shrub, glabrous throughout, the branches slender, densely leafy; stipules subulate, deciduous; petioles slender, about 6 mm. long; leafblades ovate-oblong, 5-6.2 cm. long, cuneate at the base, acuminate at the apex with an acutish acumen, coriaceous; inflorescence terminal, cymose-corymbose, few-flowered, the pedicels very short; calyx-lobes subulate; corolla subcylindric, 1.2-1.6 cm. long, the lobes very short, rounded, erect or ascending; stamens included; capsule oblong, 4-6 mm. long. (Description compiled.)
Type locality: Zimapan, Hidalgo. Distribution: Known only from the type locality.