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Pennisetum macrostachys Brongn. Trin. Mem. Acad. Imp. Sci. Saint-

Habitat Sunny, infertile ground. Specimen examined Beguin 47 BO; Koorders 19799 β BO; Kjellberg 257 BO.

68.2. Pennisetum macrostachys Brongn. Trin. Mem. Acad. Imp. Sci. Saint-

Petersbourg, Ser. 6, Sci. Math, Seconde Pt. Sci. Nat. 3,12-3: 177. 1834. Gymnotrix macrostachys Brongn. Voy. Monde 22: 104, t.11. 1830; Man. Grasses U.S. ed.2 1-1051. 1951; Contr. U.S. Natl. Herb. 46: 527-536. 2003. Plants perennial. Culms 200-300 cm by 10-20 mm, erect. Ligule a ciliolate membrane, 0.6 mm long. Blades 20-40 cm by 10-30 mm, midrib prominent beneath, surface smooth. Inflorescence a panicle. Panicle 15-30 cm long, linear; primary panicle branches accrescent to a central axis. Spikelets subtended by an involucre. Fertile spikelets sessile, 1 in the cluster. Involucre composed of bristles, 20-30 mm long; involucral bristles deciduous with the fertile spikelets, numeruous, 20-30 mm long, glabrous. Fertile spikelets comprising 1 basal sterile florets, 1 fertile florets, without rhachilla extension; lanceolate, dorsally compressed, 5-6 mm long, falling entire, deciduous with accessory branch structures. Glumes dissimilar, shorter than spikelet; thinner than fertile lemma. Lower glume oblong, 0.4 length of spikelet, transparent, no keels, 0-nerved; no lateral nerves, apex acuminate. Upper glume oblong, 3 mm long, 0.6 length of spikelet, membraneous, no keels, 1-2-nerved, no lateral nerves, apex obtuse. Florets: basal sterile florets male, or barren, with or without palea; lemma of lower sterile floret elliptic, as long as spikelet, chartaceous, 5- nerved, acute. Fertile lemma lanceolate, 5-7 mm long, chartaceous, no keel, margins flat, apex acute; palea chartaceous. Anthers 3. Notes Found in Malesia, and Southwestern Pasific. Distribution at Sulawesi North: Minahasa, Tondano, Alt. 700 m; Manado. Central: Between Palu and Parigi. South: Palopo, Alt. 200 m. Southeast: Wawotobi, Alt. 100 m Habitat Secondary and primary forest. Specimen examined Beguin 47 BO; Koorders 19777 β, 19799 β, 19804 β BO; Meijer 9256 BO; Kjellberg 1205, 3713 BO.

68.3. Pennisetum purpureum Schum. Beskr. Guin. Pl. 44. 1827.

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