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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Relchela panicoides

HABIT Perennial; caespitose. Stolons present. Culms erect, or decumbent; 20–100 cm long. Ligule an eciliate membrane; 2 mm long. Leaf-blades 6–20 cm long; 2–6 mm wide. Leaf-blade surface scabrous; rough adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate; 4–13 cm long. Primary panicle branches whorled at most nodes; bearing spikelets almost to the base. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; scabrous.

FERTILE SPIKELETS Spikelets comprising 1–2 fertile florets; with a barren rhachilla extension, or with diminished florets at the apex. Spikelets elliptic; laterally compressed; 4–6.5(–7) mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets, or definite; pubescent. Floret callus evident; pubescent; truncate.

GLUMES Glumes persistent; dissimilar; exceeding apex of florets, or reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 3–4.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acute. Upper glume ovate; 3–4.5 mm long; 1–1.3 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume surface asperulous. Upper glume apex acute.

FLORETS Fertile lemma oblong; 3–3.5 mm long; indurate; without keel; 5–7 -veined. Lemma lateral veins obscure. Lemma surface scaberulous. Lemma margins convolute; covering most of palea. Lemma apex obtuse. Palea 1 length of lemma; membranous; 2 -veined. Palea keels ciliate; adorned above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.5–2.2 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; ovoid; trigonous; sulcate on hilar side. Hilum linear; 0.33 length of caryopsis.

DISTRIBUTION South America: southern South America.

NOTES Aveneae. WDC.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.