Herbs, up to 48 cm tall, apparently perennial. Stems slender. Leaves 10–19× 3–7 cm., blade drying thinly papery, elliptic or elliptic-lanceolate; apex acute or shortly acuminate or subcaudate, cuneate at base, adaxially sparsely pilose to subglabrous, abaxially pubescent along veins, secondary veins 15–19 pairs. Petiole 1.5–3.0 cm long, pubescent. Stipules subulate. Inflorescence paniculate, up to 18 cm, simple or bifid axes numerous, 1.0 –1.5 cm, scorpioid. Flowers 5-merous, pale creamy, 0.3–0.5 cm long. Calyx glabrous or subglabrous. Ovary 2 locules. Fruits a capsule, c 0.2 cm in diam., glabrous or subglabrous, valves 4. Seeds black. A small erect shrub, up to 1.2 m tall, with sticky hairy branches, round to 4-angled. Leaves on 2.3-7.9 cm long branchlets, upper leaves sessile and lower ones long petioled, petiole 2.5–6.4 cm linear or winged upwards, lamina ovate, 7.5–15 × 4.0–7.5 cm, base cordate, rounded or attenuate, acuminate, serrate. Flowers 5-merous, 2.7–3.8 cm long, dark-blue, glandular-pubescent paniculate spikes, c. 2 cm across, in lax, upper flowers soon in distant pairs, not capitate, tube cylindrical below as long as calyx, limb petals open. Bracts ovate, glandular, deciduous. Calyx 0.6–1.0 cm, deeply divided, linear, obtuse, green, sepals 5, unequal, ligulate, blunt, viscous-hairy, enlarged and accrescent in fruit, one much larger than the rest. Stamens 4, glabrous, staminal filaments dilated. Petals 5, about 1.0–1.3 cm long, ventricose, mouth curved. Ovary glandular,hairy;style very remotely minutely hairy; stigma linear c. 0.8-0.9 cm. Capsule c. 1.9 cm long, narrowly elliptic-oblong, glandular-hairy, 4-seeded. Seeds about 0.9 cm long, hairy ,ovate. A rigid terrestrial herb about 1 m tall. Stem erect, thick, subterete, 0.7–1.3 cm in diameter. Leaves large, 26–40 × 5–10 cm, narrowly elliptic or elliptic-lanceolate, caudate-acuminate, abaxially often brown scurfy, apex long acuminate, scattered with sheathing bases, basal sheaths 4–10 cm long. Inflorescence a panicle, 10–29 or more flowered, 8–12 cm long, 2–6 branched; bracts at branch base lanceolate, 1.0–1.5 cm, floral bracts ovate, 0.2–0.4 cm. Flowers fragrant, axillary, 2–3 cm across, tubular or campanulate, greenish-white, c. 0.4–0.6 cm. Sepals and petals subsimilar, oblanceolate-linear or narrowly, 3.0–3.7 cm, with the upper one-third deflexed. Lip similar in size with the sepals and other petals, narrowly clawed which encloses the column and flares into an ovate blade with crenulate margin, blade of lip lanceolate, acuminate, apical lobe orbicular or broadly ovate-elliptic with 2 longitudinal ridges. Column c. 3 cm long, subcylindric, shorter than lip. Pollinia 2, soft, elongated. Rostellum bifid, c. 0.3 cm.