Boesenbergia sugudensis N.F.Lam, 2022
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publication ID |
https://dx.doi.org/10.3897/phytokeys.211.83985 |
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persistent identifier |
https://treatment.plazi.org/id/4BDB2AC7-935E-562F-AD06-68890EB5D4B9 |
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treatment provided by |
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scientific name |
Boesenbergia sugudensis N.F.Lam |
| status |
sp. nov. |
Boesenbergia sugudensis N.F.Lam sp. nov.
Figs 1 View Figure 1 , 2 View Figure 2
Diagnosis.
The new species resembles B. imbakensis S. Sakai & Nagam. in that the leaf sheaths are not thickened and in the anther thecae dehiscing longitudinally, but differs in having a longer petiole (>10 cm vs. 4-7.5 cm) and bilobed apex of calyx (vs. trilobed) (Table 1 View Table 1 ).
Type.
Malaysia. Borneo. Sabah. cult. at Kipandi Park, Moyog , 05°54.68'N, 116°06.27'E, 700 m elevation, 12 October 2016, Lam Nyee Fan 356 (holotype BORH!, isotype SAN). Original material collected by Linus Gokusing (BS-23) at Kampung (Kg.) Sugud, Penampang, Sabah, 05°50.23'N, 116°06.60'E, 50-100 m elevation GoogleMaps .
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 × 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 × 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 × 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 × 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 × 0.45 cm, concave, erect, apex acute, lateral lobes ovate, ca. 1.7 × 0.3 cm, clasping the labellum and extending 4 mm beyond, apex rounded; labellum, obovate-elliptic, ca. 1.3 cm × 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 × 0.5 cm, glabrous; stamen white throughout, ca. 5.7 cm long, filament ca. 3.5 × 1.2 mm (widest at base), pubescent adaxially and abaxially, anther ca. 0.3 × 0.2 cm, glabrous, anther crest ca. 2 × 3 mm, bilobed, glabrous, thecae oblong, ca. 0.2 × 0.1 cm, glabrous, dehiscing longitudinally for its entire length; ovary ca. 5 × 2 mm, 8.6 cm, stigma cup-shaped, glabrous; epigynous glands two, ca. 0.45 cm long, linear, apex truncate, white. Fruit not seen.
Distribution.
Endemic in Borneo, Sabah; known only from the type locality, Kg. Sugud.
Etymology.
The species epithet refers to the location where the type was collected.
Ecology.
Primary forest in lowlands, hill slope at 50-100 m elevation.
Conservation status.
Data Deficient (DD). The taxon was assessed using the criteria described in IUCN (2001). The taxon is endemic to Sabah and only found at Kg. Sugud, Penampang, Sabah, Malaysia. One population was observed at the site where specimens were collected.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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