Hackelia echinocarya I. M. Johnston, J. Arnold Arbor. 21: 54. 1940.

Herbs annual, 30-40 cm tall. Stems erect or ascending, much branched, long strigose. Leaves short petiolate or ± sessile, oblanceolate to linear-oblong, 2-4 cm × 3-6 mm, short strigose, base broadly cuneate to cuneate, apex obtuse to acute; midvein marked. Inflorescences terminal, widely spaced, to 10-15 cm in fruit, becoming racemelike; lower flowers with leaflike bracts. Pedicel 1-7 mm, sparsely pubescent, erect to ascending, recurved to arcuate in fruit. Calyx lobes erect at anthesis, divaricate in fruit, oblong-linear, 2-2.5 mm, appressed pubescent outside, subglabrous inside. Corolla yellow-green, campanulate-tubular, 1.5-2 mm; appendages low trapeziform, sparsely pubescent; lobes suborbicular, ca. 1 mm wide. Anthers suborbicular. Style ca. 0.5 mm. Nutlets dorsiventrally compressed, 1.5-2.2 × 1.5-1.8 mm excluding marginal glochids; adaxially protruding, ribbed; abaxially ovate, flat, with center line rib, with many fine tubercles and bristles; marginal glochids lanceolate, 1-1.5 mm, base slightly confluent, margin ciliate; attachment scar slightly above middle adaxially, ovate. Fl. and fr. Jun-Jul.

* Open slopes; ca. 2700 m. Yunnan (Dêqên Xian).