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Descriptions

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

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

Homolepis villaricensis

HABIT Perennial. Stolons present. Culms geniculately ascending; 15–40 cm long. Culm-internodes hollow; 1.5–11 cm long. Culm-nodes flush with internodes; glabrous. Lateral branches sparse; arising from lower culm. Leaf-sheaths 2–8 cm long; outer margin glabrous, or hairy. Ligule an eciliate membrane; 0.4–0.8 mm long; lacerate. Collar dark; glabrous, or pilose. Leaf-blades lanceolate, or oblong; 4–12 cm long; 6–9 mm wide. Leaf-blade surface pilose; hairy on both sides. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; effuse; 5–11 cm long; 1.5–5.5 cm wide. Panicle axis scabrous. Panicle branches pubescent in axils.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 3–18 mm long; scabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or obovate; dorsally compressed; acute; 3.2–3.7 mm long; 1.2–1.5 mm wide; falling entire. Spikelet callus square.

GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 1 length of spikelet; membranous; viscid; without keels; 5–9 -veined. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; viscid; without keels; 7–9 -veined. Upper glume apex acute.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret ovate; 1 length of spikelet; membranous; 5–7 -veined; scaberulous; rough at apex; acute. Palea of lower sterile floret 0.7–0.8 length of lemma. Fertile lemma elliptic; 2.8–3.2 mm long; indurate; pallid; shiny; without keel. Lemma margins flat. Lemma apex acute. Palea 1 length of lemma; indurate.

FRUIT Caryopsis with adherent pericarp; obovoid; 1.8–2 mm long. Embryo 0.5 length of caryopsis. Hilum linear; 0.5 length of caryopsis.

DISTRIBUTION South America: Brazil and southern South America.

NOTES Paniceae. Zuloaga.

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