Boesenbergia sugudensis

Description. Terrestrial, evergreen, herb. Rhizome fibrous, subterranean, ca. 0.8 cm in diameter, base ca. 1.5 cm in diameter, roots white. Leafy shoots 44 cm tall, with 2 - 3 leaves forming a loose pseudostem, erect, ca. 13 cm long, with 2 - 3 outer leafless sheaths, 3.9 - 12.5 x 0.8 - 1.25 cm, green, pubescent on outer surface and glabrous on inner surface, veins 1 mm apart. Ligule ca. 0.4 cm long, caudate, brownish green, glabrous. Petiole 12 - 22.5 cm long, canaliculate, green, reddish in lower half. Lamina elliptic, 20 - 22 x 6.5 - 7.5 cm, erect, dark green above, pale green beneath, glabrous above, pubescent beneath, base rounded, margin entire, glabrous, apex acuminate, with acumen ca. 3 mm. Inflorescence ca. 4.7 cm, peduncle 0.8 cm, spike ca. 7.2 x 3 cm. flowers arranged in one-sided spiral, 18 flowers including 5 new buds and 4 old buds, one flower open at a time. Fertile bracts linear elliptic, ca. 6.5 cm long, translucent pubescent on outer surface and glabrous on inner surface, margin entire, apex attenuate. Bracteoles elliptic, ca. 3.8 x 0.8 cm, translucent, pubescent on outer surface and glabrous on inner surface, margin entire, apex acute. Flower white, born singly from each bract and bracteole; calyx 1 cm long, tubular, 2 - lobed, translucent, pubescent on both surfaces; corolla tube ca. 4.6 cm long, ca. 1.2 mm wide at base, lobes white, glabrous throughout, dorsal lobe ovate-oblong, ca. 1.7 x 0.45 cm, concave, erect, apex acute, lateral lobes ovate, ca. 1.7 x 0.3 cm, clasping the labellum and extending 4 mm beyond, apex rounded; labellum, obovate-elliptic, ca. 1.3 cm x 1 cm curved-backward, with a narrow light red band in the centre lower half, yellow towards apex, glabrous; lateral staminodes white, narrowly obovate, ca. 1.5 x 0.5 cm, glabrous; stamen white throughout, ca. 5.7 cm long, filament ca. 3.5 x 1.2 mm (widest at base), pubescent adaxially and abaxially, anther ca. 0.3 x 0.2 cm, glabrous, anther crest ca. 2 x 3 mm, bilobed, glabrous, thecae oblong, ca. 0.2 x 0.1 cm, glabrous, dehiscing longitudinally for its entire length; ovary ca. 5 x 2 mm, 8.6 cm, stigma cup-shaped, glabrous; epigynous glands two, ca. 0.45 cm long, linear, apex truncate, white. Fruit not seen.