Globba lancangensis Y.Y.Qian

Sangvirotjanapat, Sunisa, Denduangboriphant, Jessada & Newman, Mark F., 2019, A taxonomic revision of Globba subsect. Nudae (Zingiberaceae), European Journal of Taxonomy 503, pp. 1-37 : 25-26

Globba lancangensis Y.Y.Qian

Figs 9E , 10

Acta Botanica Austro Sinica 9: 51 ( Qian 1994).

Type material

Holotype CHINA • Yunnan, Lancang Lahuzu Zizhixian, Lancang ; 1200 m a.s.l.; 16 Oct. 1984; Y.Y. Qian 2255 leg.; SMAO.

Isotype

CHINA • Same data as for the holotype; IBSC .

Other material examined

CHINA – Lancang Lahuzu Zizhixian • Lancang; 13 Jul. 2000; K.J. Williams, Q-J. Li and Y.Y. Qian 00–241 leg.; E • Menghai, Xishuangbanna pref., Mung-Ze, near Mung-Hai city; 14 Jul. 2000; K.J. Williams and Q-J. Li 00–253 leg.; E • Liming Farm, Mengzhe; 14 Oct. 2005; S.S. Zhou 2962 leg.; QBG • Menglian, Langle village; 15 Oct. 2005; S.S. Zhou 2993 leg.; QBG.

Description

Herb 60–80 cm tall. Leaf sheaths ca 4, bladeless, leaf sheaths appearing node-like along the leafy stem; ligule ca 2 mm long, truncate or shallowly bilobed, sparsely pubescent, light green; blades 6–10, 6.5– 13 × 2.5–3 cm, sessile, oblong to narrowly elliptic, base obliquely cuneate, apex acuminate, puberulent above and below. Inflorescence, 10–20 × 5–7 cm, lax, conical sometimes secund; peduncle 1.5–3 cm long; rachis light green, minutely pubescent; bracts and bracteoles 1.5–7 × 1–2 mm, caducous, narrowly elliptic, apex acute, pubescent, light green; cincinni 5–9(–14), 1.5–6.5 cm long; pedicel ca 1 mm long. Flowers ca 3 cm long, primrose or pale yellow; ovary ca 3 mm long (⚥), ellipsoid; calyx ca 4 mm long, infundibuliform, lobes acute; floral tube 12–16 mm long, dorsal and lateral corolla lobes to 6 mm long, hooded, elliptic; lateral staminodes 11–13 × 5–7 mm, obovate, apex round, pale yellow; labellum 10–13 × 4–5 mm, triangular, bilobed, spot absent, base truncate, apex round, nectar tube ca 4 mm long; filament ca 23 mm long; anther ca 2 mm long, connective tissue, crest and appendages yellow-orange, semi-translucent, crest ca 1 mm long (shorter in Ƌ), truncate; ⚥ appendages ca 3 mm long, acuminate, bifid, upper pair bigger, decurrent to connective tissue and crest, lower pair smaller; Ƌ appendages ca 3 mm long, acuminate, bifid, upper pair only slightly bigger than lower. Fruit 7–10 × 5–7 mm, almost globose, shallowly ridged, green. Bulbils not seen.

Distribution and habitat

China (Yunnan), 1080–1350 m a.s.l.

Conservation status

Least Concern. Although G. lancangensis has a small AOO of 20 km 2 and EOO of 1897 km 2, this species occurs in the Xishuangbanna Biosphere Reserve. It may also occur in the adjoining Nam Ha

reserve in Lao PDR. Surveys should be carried out to see if the species occurs in this area. The species is also in ex situ cultivation at one botanical garden ( BGCI 2018).

Notes

Globba lancangensis is endemic in China. It is similar to G. insectifera in its habit, broad lateral staminodes, and labellum shape but differs by its fruit shape, the form of the leafy stem and the colour of the lateral staminodes.

Figures

Fig. 9. A–C. G. insectifera Ridl. A. Isotype of G. kerrii Craib (E00097476). B. Inflorescence in dry season. C. Inflorescence in rainy season (S. Sangvirotjanapat 743 leg.). D–E. G. lancangensis Y.Y.Qian. D. Flowers (P. Suksathan s.n. leg.). E. Specimens from China, S.S. Zhou 2993 leg. (QBG). Photographs: A–C, E, S. Sangvirotjanapat; D, P. Suksathan.

Fig. 10. Distribution range of G. insectifera Ridl. (circles) and G. lancangensis Q.Q.Yian (triangles). The type locality of each species is indicated by a bigger symbol.