|
Note - this takes you off
of our website |
GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Rytidosperma montis-wilhelmi
HABIT Perennial; cushion forming. Basal innovations intravaginal. Culms 6–12 cm long. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath oral hairs ciliate; 2–4 mm long. Ligule a fringe of hairs; 0.4–1 mm long. Leaf-blades straight, or curved; filiform; involute; 2.2–7.3 cm long; 0.4–0.8 mm wide. Leaf-blade surface smooth; glabrous.
INFLORESCENCE Inflorescence a panicle, or comprising only a few spikelets; comprising 2–4 fertile spikelets; shorter than basal leaves. Peduncle glabrous, or pubescent above.
Panicle bearing few spikelets.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 4–6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 5.5–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5–1 mm long. Floret callus 0.3–0.4 mm long; pubescent; obtuse; disarticulating obliquely. Floret callus hairs 0.3–0.6 mm long.
GLUMES Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture. Lower glume oblong, or ovate; 4.5–6 mm long; 1 length of upper glume; chartaceous; much thinner on margins; without keels; 3–5 -veined. Lower glume apex acute. Upper glume oblong, or ovate; 4.25–6 mm long; 0.9–1 length of adjacent fertile lemma; chartaceous; with scarious margins; without keels; 5–7 -veined. Upper glume apex acute.
FLORETS Fertile lemma oblong; 5–6 mm long; membranous; without keel; 9 -veined. Lemma surface smooth; with marginal hair tufts; bearing 2 hair tufts in all. Lemma hairs 1 mm long. Lemma apex dentate; 2 -fid; with filiform lobes; with lobes 1–2.5 mm long; awned; 1 -awned. Principal lemma awn from a sinus; 1.25–6 mm long overall. Palea 3–5 mm long. Palea keels ciliolate; adorned above. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; obovate; fleshy; glabrous. Anthers 3; 0.75–1.25 mm long.
FRUIT Caryopsis with adherent pericarp; obovoid; 1.5 mm long.
DISTRIBUTION Asia-tropical: Papuasia.
NOTES Arundineae. Alp Fl N Guin 1999.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
