Notes on the genus Kaempferia L. (Zingiberaceae) in Thailand

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Type: Thailand, Curtis 3252 (lectotype K)
This taxon is placed among the K. galanga group,
plants with 2-3 flat, near-the-ground leaves and inflorescences
produced in the innermost leaf-sheaths.
However, K. glauca Ridl. can be differentiated from
other species of the same group by its glacous leaves,
inflorescence with hairy peduncle and violet flowers,
obovate-cuneate to suborbicular lateral staminodes,
suborbicular labellum (divided to the base) with white
blotch near the base, large violet recurved reniform
anther crest, and the hairy calyx tube and ovary.
This species is distributed in Thailand and Laos.
9. K. laotica Gagnep. in Bull. Soc. Bot Fr. 54: 166.
1907; Gagnep. in Lecomte, Fl. Gén. I.-C. 6: 51. 1908;
Sirirugsa in Nord. J. Bot. 9: 259. 1989 & in Thai For.
Bull. (Bot.) 19: 14. 1992.
Type: Laos, Xiang-kouang, Spire 309 (holotype P)
This taxon is also in the K. galanga group, plants
usually with two flat, near-the-ground leaves and inflorescences
produced in the innermost leaf-sheaths.
It differs from K. elegans Wall. ex Baker and K. glauca
Ridl. by its sessile inflorescences and glabrous calyx
tubes and ovaries. However, it is similar to K.
roscoeana Wall., but differs in the following characters:
the lower leaf surface is hairy and the anther
crest rectangular with the entire or emarginate apex
(compared with the leaves, both sides are glabrous
and the anther crest is small, ovate keeled with the
entire apex). The flower of this species is white with
obovate-cuneate staminodes and deeply divided obovate
lips with purple blotch at the center.
This species is distributed in evergreen forests
in northeastern Thailand and in Laos.
10. K. larsenii Sirirugsa in Nord. J. Bot. 9: 257. 1989.
Fig. 1 H-P & in Thai For. Bull. (Bot.) 19: 14. 1992.
Type: Thailand, Ubonratchathani, Nilviset 19 (holotype
C, isotype BKF)
This species can be placed in the K. galanga L.
group. It can be differentiated by its petiolated (about
1 cm long) elliptic-linear to linear leaf blade (up to 1
cm wide) with the hooded and acute apex, broadly
triangular ligule (about 1 mm long), and the obovate
anther crest with rounded or crenate apex. The flowers
of this taxon are violet with the obovate staminodes
and the lip divided to the base (each lobe obovate).
This species is distributed in northeastern Thailand
(Ubonratchathani and Amnat Charoen provinces)
and southern Laos (Champasak Province). It can be
found in open areas and in paddy fields. It is used by
the local people for medicinal purposes.
11. K. marginata Carey ex Roscoe, Monandr. Pl.
Scitam.t. 93. 1824; Horan. Monogr.: 21. 1862; Bak. in
Hook., Fl. Br. Ind. 6: 219. 1894; Schum. in Engl.,
Pflanzenr. 4(46), 20 Heft: 78. 1904; Sirirugsa in Nord.
J. Bot. 9: 259. 1989 & in Thai For. Bull. (Bot.) 19: 10.
1992; T.L.Wu & K.Larsen in Z.L.Wu & PH. Raven, Fl.
China 24: 370. 2000.
Type: Myanmar, Tenasserim, Carey no. ? (lectotype
K)
This species resembles and may be conspecific
to K. galanga L. However, the major differences of
both taxa are the color of the leaf margin and color of
the labellum. The leaf margin of K. marginata Carey
is purple in color, while that of K. galanga L. is green.
The labellum of the former is purple, sometimes with
longitudinal white bands near the margin, whereas
that of the latter is white with a purple marking at
the base.
This taxon is distributed in a range from India,
Myanmar, China, Thailand, Laos and Cambodia. In
Thailand, it can be often seen in open areas, paddy
fields, or evergreen forests in the northern, northeastern,
and upper southern regions of the country. It is
also used by the local people for food and medicine.
12. K. parviflora Wall. ex Baker. in Hook., Fl. Br. Ind.
6: 221. 1894; Schum. in Engl., Pflanzenr. 4(46), 20 Heft:
78. 1904; Sirirugsa in Nord. J. Bot. 9: 259. 1989 & in
Thai For. Bull. (Bot.) 19: 6-7. 1992.
Type: Myanmar, Bank of the Attran River, Wallich
6587 (lectotype K)