Garnotia undulata Veldk., 2015

Veldkamp, J. F., Teerawatananon, A. & Sungkaew, S., 2015, A revision of Garnotia (Gramineae) in Malesia and Thailand, Blumea 59 (3), pp. 229-237 : 235

6. Garnotia undulata Veldk. , sp. nov. — Fig. 1

Plants perennial. Culms erect, geniculate at base and rooting in the decumbent nodes, branched along the culm, c. 0.5 m long. Nodes puberulous. Sheath mouth densely hairy. Ligule 0.5–1 mm long. Blades linear, flat, 3–6 cm by 4.5–6.5 mm, glabrous, base abruptly narrowed. Panicle 8–10 cm long, common axis shorter than the lowest branches, branches solitary, at maturity patent, smooth. Spikelets 4–4.5 mm long (excl. awn), callus hairs 0.5–0.9 mm long. First glume 4–4.5 mm long, subequal to longer than the second glume, acuminate. Second glume 3.75–4 mm long, apex acuminate to mucronate, arista 0–0.5 mm long. Lemma awn apical, imperfect, column absent, arista thread-like, wavy to crinkly, 11–15 mm long. Anthers c. 0.7 mm long. — Type: Veldkamp 7175 (holo L; BO) .

Distribution — Only known from the type from Sumatra, East Coast, Samosir Isl.

Habitat — Secondary forest along trail near rivulet, c. 950 m altitude.

Notes — Gould (1972: 427) accounted for only 4 taxa with curly, fine awns which range from Celebes to N Australia and into the Pacific. The collection West of the Wallace Line (Veldkamp 7175, BO, L) from Samosir Isl. in N Sumatra is highly aberrant for its fairly weak habit, basally geniculate culms, rooting at the decumbent nodes, short leaves, and inflorescences with a short common axis and wavy, more or less patent branches that gives a first impression of an Arthraxon P.Beauv. In some specimens of G. tenella from Oman the arista is wavy to curled and even looped as well.

Figures

Fig. 1 Garnotia undulata Veldk. a. Habit; b. partial panicle branch; c. spikelet; d. lower glume; e. upper glume; f. caryopsis; g. lemma (Veldkamp 7175, L). — Drawn by A. Walsmit Sachs.