Thibaudia bicolor Ruiz & Pavón ex DC., Prodr. 7: 561. 1839. Psammisia bicolor (Ruiz & Pavón ex DC.) Klotzsch, Linnaea 24: 44. 1851. Vaccinium bicolor (Ruiz & Pavón ex DC.) F. Muell., Sel. pl. indust. cult. 249. 1876. Type. Unnknown.Shrub, often scandent; stems stout, subterete, glabrous, brownish or cinereous. Leaves oblong or ovate-oblong, 10-25 x 3-7 cm, basally cuneate, apically acuminate, marginally subentire or shallowly crenate towards apex, glabrous; 5-7-plinerved from near the base, the midrib slightly impressed above and prominent beneath, the reticulate veinlets slightly raised on both surfaces; petiols subterete, 6-10 mm long, glabrous. Inflorescence axillary, short-racemose, glabrous in all parts, 10-20-flowered; rachis subterete, stout, 1-3 cm long, up to 5 mm diam., conspicuously marked with scars of deciduous pedicels; pedicels striate, 20-45 mm long; floral bract oblong, 3-4 mm long; bracteoles basal. Flowers with calyx 4.5-8 mm long; hypanthium campanulate, 2-4 mm long and 4-6 mm diam.; limb 2.5-4 mm long; lobes ovate, apiculate, ca. 1.5 mm long, thick-margined; corolla cylindric-urceolate, 18-27 mm long and ca. 8 mm diam. near base, deciduously sparsely pubescent without at middle, the lobes 1.5-2 mm long; stamens 10-13 mm long; filaments distinct, slightly pilose at margins distally with hairs to 0.3 mm long; connectives alternately 2-spurred (sometimes spurred on one margin only), the spurs acute, distinct; thecae 6-8 mm long; tubules 3-4 mm long. Berry not seen.Psammisia engleriana Hoerold, Bot. Jahrb. Syst. 42: 304. 1909. Type. Peru. Huánuco: near Monson, Weberbauer 3510 (holotype, B†)
Psammisia urbaniana Hoerold, Bot. Jahrb. Syst. 42: 307. 1909. Type. Peru. Cuzco: Sandía, Weberbauer 1159 (holotype, B†).
Psammisia weberbaueri Hoerold, Bot. Jahrb. Syst. 42: 307. 1909. Type. Peru. Junín: Huacapistana, Weberbauer 2151 (holotype, B†).
Distribution. Venezuela, Colombia, Peru, Bolivia.