REINWARDTIA_13_1_101209 + dftar isi+new RE IN W AR DT IA 13 (1) A JOURNAL ON TAXONOMIC BOTANY, PLANT SOCIOLOGY AND ECOLOGY RE IN W AR DT IA 13 (1) A JOURNAL ON TAXONOMIC BOTANY, PLANT SOCIOLOGY AND ECOLOGY REINWARDTIA Vol 13, Part 1, pp: 31 − 32 31 ERAGROSTIS DYSKRITOS LASUT (GRAMINEAE), A NEW SPECIES FROM SULAWESI Received July 13, 2009; accepted August 17, 2009 MARTHEN THEOGIVES LASUT 1, 2 1. Postgraduate School (SPS) IPB Bogor. 2. Herbarium Wallaceana, Department of Agronomy, Faculty of Agriculture, Sam Ratulangi University (UNSRAT), Kampus Kleak Bahu Manado 95115, Indonesia. E−mail: theo_lasut@yahoo.com. ABSTRACT LASUT, MARTHEN T. 2009. Eragrostis dyskritos Lasut (Gramineae), a new species from Sulawesi. Reinwardtia 13 (1): 31–32. — A new species of Eragrostis dyskritos Lasut sp. nov. is described. Keywords. Eragrostis dyskritos, Gramineae, Sulawesi. ABSTRAK LASUT, MARTHEN T. 2009. Eragrostis dyskritos Lasut, satu jenis baru dari Sulawesi. Reinwardtia 13(1): 31–32. — Telah dipertelakan satu jenis baru Eragrostis dyskritos Lasut sp. nov. Kata kunci. Eragrostis dyskritos, Gramineae, Sulawesi. INTRODUCTION During field trips in the Soputan Mountains of N. Sulawesi, a species of Eragrostis Wolf (Gramineae) was collected by Mr. Onong Sabintoe that has defied identification. It may very well be an introduction from somewhere else, although the locality suggests that it isn’t. The site on the internet ‘World grasses species’ maintained at K (with in November 2006 descriptions in DELTA format of 399 Eragrostis species) also gave no satisfactory match. I therefore with hesitation describe it here as a new species naming it ‘dyskritos’, Greek for ‘difficult to judge’. If anyone can tell me whether it has been described previously, please do. Eragrostis dyskritos Lasut, spec. nov. — Fig.1. Ab omnibus speciebus malesianis in habitu annuo, culmis fasciculatis erectis, vaginae collo piloso, ligulis collariformibus ciliolatis, paniculis contractis laxis, ramis infimis solitariis vel fasciculatis glabris in parte c. 0.23 infima, pedicellis 6–13 mm longi spiculis 4–5 mm longis longioribus, glumis inferioribus lemmatibus inferioribus 0.25−0.3 plo longioribus enervatis, lemmatibus inferiori- bus acutis, paleis longe persistentibus, caryopsidibus fusiformibus 0.7–0.8 mm longis differt.—Type: Onong S. 36, (L, holo; BO), N. Sulawesi, G. Soputan, October 2004. Annuals. Culms tufted, erect, branching intra– vaginally at base, 0.35–0.55 m long, eglandular. Collar of sheaths pilose. Ligule a ciliolate rim. Blades 9–13 cm by 1–2 mm. Panicle contracted to interrupted, 20–23 cm by 5–7 cm, at least the lower axils of the panicle branches bearded, branches ap- pressed to erecto–patent, scaberulous, the lower- most ones solitary or fascicled, 1–5 together, 5–8 cm long, naked in the lower 0.23th part. Pedicels 6– 13 mm long, longer than the spikelets. Spikelets laterally compressed, 4–5 mm by 1–1.5 mm, disar- ticulating from the base upward, rhachilla persis- tent. Glumes unequal; lower glume 0.5–0.6 mm long, 0.25–0.3 times as long as first lemma, acute, 0 –nerved; upper glume 1.1–1.2 mm long, acute, 0(– 1)–nerved. Rhachilla joints not visible between the lemmas to visible at maturity. First lemma 1.7–2 mm long, acute. Paleas long–persistent, keels sca- berulous. Anthers 3, ca. 0.2 mm long, 0.1–0.13 times as long as the lemma. Caryopsis fusiform, laterally somewhat flattened, dorsally not grooved, 0.7–0.8 mm long. Pericarp smooth, (dark) tea– coloured. Distribution. Only known from the type. Habitat. Not recorded. REINWARDTIA 32 [VOL.13 Notes. In Malesia it seemed closest to E. pilosa (L.) P. Beauv., which differs as follows: • Culms tufted, erect. Ligule a ciliolate rim. Panicle contracted to interrupted, lowermost branches soli- tary to fascicled. Paleas long–persistent. Caryopsis fusiform................................................... E. dyskritos • Culms tufted, geniculate, with new shoots at the nodes, not rooting. Ligule a row of hairs. Panicle lax, lowermost branches whorled. Paleas caducous. Caryopsis ellipsoid...................................... E. pilosa ACKNOWLEDGEMENTS Dr. J.F. Veldkamp (L) is very much thanked for his assistance in my attempt to identify this collection. REFERENCE VELDKAMP, J. F. 2002. Revision of Eragrostis (Gramineae, Chloridoideae) in Malesia. Blu- mea 47: 157–204. Fig. 1. Eragrostis dyskritos Lasut. Left: habit. Bottom right: part of culm, sheath, ligule, and blade. Centre right: floret and opened floret. Upper right: spikelet. (Based on Onong S 36, BO). cover.pdf REINWARDTIA_13_1_291209_theo.pdf