Boesenbergia ganaensis N. F. Lam, 2024

Lam, Nyee Fan, Ibrahim, Halijah, Sam, Yen Yen, Mohammad Zakaria, Rozainah & Poulsen, Axel Dalberg, 2024, Three new species of Boesenbergia (Zingiberaceae) from Sabah, Malaysia, PhytoKeys 247, pp. 39-53 : 39-53

publication ID	https://doi.org/ 10.3897/phytokeys.247.107961
DOI	https://doi.org/10.5281/zenodo.13904248
persistent identifier	https://treatment.plazi.org/id/3C0CBD2F-CA10-5CE9-B9B9-47DD94B2A05E
treatment provided by	PhytoKeys by Pensoft
scientific name	Boesenbergia ganaensis N. F. Lam
status	sp. nov.

Treatment

Boesenbergia ganaensis N. F. Lam sp. nov.

Figs 4 View Figure 4 , 5 View Figure 5

Diagnosis.

The new species resembles B. burttiana by having a narrowly ovate lamina and a similar plant height, but differs in having an obtuse leaf base, an acute leaf apex (vs. attenuate leaf base, slightly acuminate leaf apex), absence of ligule, a longer petiole (4 cm vs. 1.8 cm) and the anther thecae dehiscing by pores (vs. slit) (Table 2 View Table 2 ).

Type.

Malaysia. Borneo. Sabah. Cultivated at Kipandi Park, Moyog , 05 ° 54.68 ' N, 116 ° 06.27 ' E, 700 m elevation. 8 Aug 2016, Lam Nyee Fan 348 (holotype BORH!, isotype SAN) GoogleMaps . Original material collected from Ranau , Gana-gana, by Linus Gokusing (BS- 15), 05 ° 53.16 ' N, 116 ° 39.30 ' E, 700 m elevation, 2 February 2013 GoogleMaps .

Description.

Terrestrial, evergreen, herb. Rhizome fibrous, subterranean, base ca. 0.4 cm in diameter, light brown, roots white, ca. 4 cm long. Leafy shoots ca. 14 cm tall, with 2–4 sheaths, ca. 3.5 × 2.5 cm, glabrous, green, margins entire. Ligule absent. Petiole 2.8–4 cm long, grooved, green. Leafy shoots 1–2. Lamina elliptic, 10–11.5 × 4–5.5 cm, dark green above, green beneath, glabrous, margin entire; base obtuse, apex acute with acumen ca. 1 mm. Inflorescence ca. 2.7 × 0.4 cm, peduncle ca. 0.35 cm with up to 10 flowers arranged in a one-sided spiral, one flower open at a time. Fertile bracts narrowly ovate, ca. 2.4 × 0.5 cm, white, outer and inner surfaces glabrous, almost translucent, margin entire, apex acute. Bracteole elliptic, ca. 1.8 × 0.5 cm, white, outer and inner surfaces glabrous, translucent, margin entire, apex acute. Flower white, born singly from each bract, calyx 0.7 cm long, tubular, white, glabrous, corolla tube white, glabrous, apex rounded, dorsal lobe elliptic, ca. 1.3 × 0.35 cm, concave, lateral lobes elliptic, ca. 1.2 × 0.2 cm, labellum bucket shaped, obovate (when flattened), ca. 1.1 cm × 0.8 cm, yellow band from base in the middle, spreading to almost entire surface towards the apex with lighter yellow laterally with red bands from 2 / 3 of the centre yellow band towards side, lateral staminodes oblong, ca. 0.7 × 0.2 cm, white, apex acute, glabrous, stamen ca. 1.2 cm long; filament ca. 7 × 1 mm (widest at base), pubescent adaxially and abaxially, anther ca. 3.5 mm long, pubescent; anther crest trilobed, pubescent; thecae oblong, ca. 0.3 × 0.1 cm, white, glabrous, dehiscing by pores, stigma truncate apex, white, glabrous, epigynous glands 0.2–0.4 cm long, linear, apex pointed. Fruit not seen.

Distribution.

Endemic in Borneo, Sabah; known only from the type locality at Kampung [village] Gana-gana, Ranau.

Etymology.

The species epithet refers to the location where the species was collected.

Ecology.

Granite area at 500–600 m elevation.

Conservation status.

Vulnerable (VU D 2). The species is endemic to Sabah and only found at Ranau, Sabah, Malaysia. There were only four populations found at the site of collection and it has not been found outside the type locality (Fig. 6 View Figure 6 ).