Wilson and Johnson, Juncus (Juncaceae) in Malesia 
365 
herbarium in P there are three sheets of that collection and one of the Goering 
collection. The sheet chosen as lectotype is that fully labelled in Steudel's hand. There 
are five more sheets of the Hohenacker collection in P that are not identified as being 
from Steudel's herbarium. 
/. indicus Royle ex D. Don (Don 1840: 323). Type citation: 'Juncus indicus ... Royle mss. 
a. In Nepalia ad Katmandu (Wallich) ... (v.s.sp. in Herb. Wallich ...)'. Type: Nepal, 
Wnllich 8999, 1821; syns G (n.v.), K (3 sheets; one shown on IDC microfiche 7394). 
Another sheet of this Wallich collection is the type of /. wallichianus (q.v. above). Don 
also cited a Royle specimen but referred it to his var. nanus (q.v. below under 
J. leschenaultii). J. indicus is often said to have been published in Don (1849:10) under 
the wrong date of 1839, which was actually the date on which the paper was read to 
the Society (Raphael 1970). 
/. koidzumii Satake (Satake 1936: 89). Type citation: 'Honsyu: Prov. Settu — circa 
Takarazuka (N. Ui, Aug. 4 1934 — Typus in Herb. Imperial Univ. Tokyo).' Type: Japan: 
Honshu: Hyogo Pref., Takarazuka, N. Ui s.n., 4 Aug 1934; holo TI; iso K. 
J. ohwianus M.T. Kao (in Kao and De Vol 1978: 150, pi. 1303). Type citation: 'Hsinchu: 
Supachian, Simada 1027 (Type in TAI).' Type: Taiwan: Sintiki (18 sen[?J), Y. Simada 
1027A, 12 Aug 1923; holo TAI. 
/. prismatocarpus subsp. teretifolius K.F. Wu (Wu 1994: 456). Type citation: 'Guandong: 
Conghua, Sanjiao Shan, satis communis in arenosis et paludibus, 1932-05-31, W.T. 
Tsang 20636 (holotypus, IBSC).' Type: China: Guandong (Kwangtung): Sam Kok Shan, 
Tsungfa-Lungmoon District, Kwangtung, W.T. Tsang 20636, 31 May 1932; holo ISBC 
(n.v.); iso K. Note that the transliteration of the Chinese ideograms for the locality is 
very different in 1932 and 1994, but the ideograms themselves are the same on the 
label and in the publication. 
[/• prismatocarpus auct. non R. Br.: Backer 1951: 213 p.p.; Larsen 1972: 168, p.p.; Van 
Royen 1979: 815 p.p.] 
Tufted or shortly rhizomatous perennial. Culms terete, ?mid-green, 30-60 cm long, 
1.0-1.8 mm diam. Leaves unitubulose, spread along culm, more or less equalling 
culms, terete, 1.0-1.4 mm diam.; auricles 1.5-2.0 mm long. Inflorescence terminal, 1—12 cm 
long, diffuse, with flowers clustered, 4-40 per cluster and 6-20 clusters per 
inflorescence; 1 well-developed involucral bract, 2.5-7 cm long, lateral, shorter than 
inflorescence. Flowers without bracteoles. Tepals acuminate, the tips spreading to 
recurved at maturity, straw-brown (often red-tinged at apex) to red-brown, with more 
or less broad (0.1-0.2 mm wide) hyaline margins; outer tepals (2.3-)2.5-3.5(-3.7) mm 
long, more or less equalling inner tepals. Stamens 3, shorter than outer tepals; anthers 
0.4—0.7 mm long, shorter than filaments. Capsule 1-locular, shortly (occasionally 
greatly) exceeding or equalling outer tepals, ovoid to narrow-ellipsoid, golden brown 
to red-brown, acute to broad-acute, with more or less short beak (0.2-0.5 mm long). 
Seeds 0.6-0.8 mm long. 
Illustrations: Fig. lc, d; also Kao and De Vol (1978: pi. 1303, as J. ohwianus). 
Distribution and habitat: In Malesia, at higher altitudes (1500-2900 m) on the islands 
of New Guinea, Java (West and Central), Sumatra (West; only one collection); also in 
Sri Lanka, India, Bhutan, Nepal, Thailand, China (Yunnan), and Japan. Recorded also 
for North Korea, Eastern Manchuria, the Sachalin Islands and the Kuriles by Kitagawa 
(1979:163), but we have seen no specimens from these regions. Recorded as growing 
in swamps and along small streams and ditches. According to Backer (1924: 44; Backer 
and Bakhuizen f. 1968: 451), '/. prismatocarpus' (that is, either J. leschenaultii or 
/. wallichianus or both in this context) occurs on the mountains in West, Central and 
East Java. However, Backer (1951: 214) does not mention East Java for this 'taxon' and 
