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41 (2015)
371
Fig. 7 (A,B) Oryza meyeriana (Zoll. & Moritzi) Baill. var. granulata (Watt) Duistermaat: (A) inflorescence; (B) habit.
(C,D) O. minuta J. Presl, (C) habit; (D) inflorescence. (E,F) O. ridleyi Hook. f., (E) inflorescence; (F) habit. (All photos:
Paweena Traiperm).
groves, at elevations up to 1000 m altitude. Flower-
ing all year round.
Vernacular name.— Khao-nok.
Conservation assessment.— This variety was
recorded from 69 locations throughout Thailand,
where it has an EOO of 532 788 km
2
and an AOO of
228 km
2
. It is a very common plant that forms small
to medium-sized subpopulations in close proximity.
It grows in a wide variety of habitats and is not
thought to be subject to any particular threat. It is
regarded as LC in Thailand.
Notes.— The type specimens of Synopsis
glumacearum
were acquired by B in 1855 but were
subsequently destroyed. There are two Herb. Wight
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372
ScienceAsia
41 (2015)
Fig. 8
Oryza minuta
J. Presl: (a) habit; (b) lemma;
(c) lodicules; (d) pistil; (e) stamens; (f) caryopsis. Drawn
by M. Norsaengsri.
specimens in the K herbarium, but only one (Herb.
Benthamianum
; K000032065) is annotated with the
name, and this one is also the better preserved.
Accordingly, it is here selected as the lectotype.
2.
Oryza minuta
J. Presl, Reliq. Haenk. 1(4–5):
208. 1830. Type: Philippines, Luzon, Haenke s.n.
(holotype PR, n.v.).— O. officinalis Wall. ex G. Watt,
Dict. Econ. Prod. India 5: 501. 1891. Type: India,
Sep.
/Oct. 1827,
Wallich 8635 (holotype CAL, n.v.;
isotypes K!, W).— O. latifolia Desv. var. silvatica A.
Camus, Bull. Mus. Hist. Nat. 27: 456, pl. 18, f. 41.
1921. Type: Vietnam, Thu-D`
âu-Môt, Budop, 28
Nov. 1919, Poilane 839 (holotype P!).
Fig. 7
C,D,
Fig. 8
.
Perennial, tufted or sometimes rhizomatous
herb.
Culms up to 1 m tall, erect; nodes glabrous.
Leaf-sheath
loose, terete, glabrous, auricles some-
times well defined, and with stiff hairs; ligules
1.5(–5) mm long, with fimbriate margins; leaf-
blades
2–3 cm wide and up to 80 cm long, nar-
rowly lanceolate to lanceolate, apex acute, mar-
gins scabrous, rough with short hairs on both sur-
faces. Inflorescence a panicle, loosely contracted,
erect. Spikelets 2–2.5
× 5.5–6(–6.5) mm, oblong,
light green or sometimes yellowish-brown. Glumes
c. 0.5 mm long, cup-shaped; sterile lemma 1.3–
2 mm long, less than a half length of the spikelet,
lanceolate; fertile lemma 1.3–2
× 4.5–5.5(–6.5) mm,
oblong or elliptic, boat-shaped, coriaceous, regu-
larly granulate on the surface, slightly hairy between
the granules, apex acuminate, awned or awnless; if
awned, c. 2.5–15 mm long. Palea c. 6.5 mm long,
boat-shaped, half as broad as the lemma, similar in
texture and surface.
Thailand.— SOUTH-WESTERN: Kanchanaburi,
28 Jan. 1961, K. Larsen 9330 (C, K); Sai Yok, 6 Dec.
1961, K. Larsen 8546 (C, K); Huay Menam Noi, 1
Jan. 1962, K. Larsen 9074 (C, K); Huay Bankau,
9 Nov. 1971, C.F. van Beusekom, C. Phengkhlai, R.
Geesink & B. Wongwan 3604
(C, L), 15 Nov. 1971,
3777
(C, K, L); Ratchaburi, Thung Kang Yang, 5
Jul. 1963, K. Larsen 10524 (C, K, L); CENTRAL:
Saraburi, Khao Sam Lan, 22 Dec. 1988, Songkran
/
DAVaughan 086
/88/TNE135 (K); Bangkok, 31 Jan.
1920, Kerr 3975 (K), 31 Aug. 1920, Kerr 4440 (K),
25 Mar. 1923, Kerr 6772 (BK, K), 5 Oct. 1957, T.
Tateoka W0002
(K).
Distribution.— Also occurring in Myanmar and
China.
Habitat and Ecology.— Growing in shade in
swampy areas in evergreen forest and in dry de-
ciduous forest, from sea level to 400 m elevation.
Flowering from June until March.
Vernacular name.— Ya-la-man.
Conservation assessment.— In Thailand, this
species is known from a relatively restricted area
in central and southwestern parts of the country,
with an EOO of 91 280 km
2
and an AOO of 60 km
2
.
Nevertheless, it is common, typically forming large
populations. Some subpopulations in the southwest
are likely to be contiguous with those in Myanmar.
The species does not face any known threats in
Thailand. It is regarded as LC in Thailand.
3.
Oryza ridleyi
Hook. f., Fl. Br. India 7(21): 93.
1897. Type: Malaya, Pahang, Pekan, Ayer Etam, 4
May 1890, Ridley 1178 (holotype K!; isotypes LE,
SING!).
Fig. 7
E,F,
Fig. 9
.
Perennial, loosely tufted, stoloniferous herb.
Culms
up to 1 m tall, erect; nodes glabrous. Leaf-
sheath
slightly loose, nearly smooth, auricles well
defined, ciliate; ligules 1(–5.5) mm long; leaf-
blades
1.2–1.5
× 14–34 cm, narrowly lanceolate or
linear-lanceolate, upper surface scabrid, lower sur-
face smooth or scabrid on nerves, margins scabrid.
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