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Descriptions

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

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

Uniola condensata

HABIT Perennial; caespitose. Rootstock evident. Rhizomes absent. Culms erect; 100–150 cm long. Leaves without demarcation between sheath and blade. Leaf-sheaths glabrous on surface, or pilose. Leaf-sheath oral hairs lacking. Ligule absent. Leaf-blades 30–60 cm long; 3–8 mm wide; coriaceous; stiff. Leaf-blade surface ribbed.

INFLORESCENCE Inflorescence composed of racemes.

Racemes numerous; borne along a central axis; closely spaced; unilateral; 1–3 cm long; simple, or secondarily branched. Central inflorescence axis 25–40 cm long. Spikelet packing broadside to rhachis; crowded; regular; 2 -rowed.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels oblong.

FERTILE SPIKELETS Spikelets comprising 1–3 basal sterile florets; 3–6 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; compressed strongly; 4–5 mm long; 2.5–4 mm wide; falling entire. Rhachilla internodes obscured by lemmas.

GLUMES Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 1–2.5 mm long; 0.3–0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate.

FLORETS Basal sterile florets similar; barren; without significant palea. Lemma of lower sterile floret similar to fertile lemma; elliptic; 3 mm long; coriaceous; 1-keeled; 5–7 -veined; acute. Fertile lemma elliptic; 3 mm long; coriaceous; keeled; 5–7 -veined. Lemma midvein scabrous. Lemma apex acuminate; mucronate. Palea 0.75 length of lemma; 2 -veined. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1–1.5 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 1 mm long.

DISTRIBUTION South America: western South America.

NOTES Eragrostideae. WDC.

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