GrassBase - The Online World Grass Flora


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

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

Brachiaria ophryodes

HABIT Perennial. Culms geniculately ascending; 15–25 cm long; rooting from lower nodes. Leaf-sheaths pilose. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blades 5–20 cm long; 3–6 mm wide. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins cartilaginous; scabrous; tuberculate-ciliate; hairy at base. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 2–4; borne along a central axis; unilateral; 3–4 cm long. Central inflorescence axis 1–2 cm long. Rhachis wingless; angular. Spikelet packing adaxial; regular; 2 -rowed.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; 0.5 mm long; bearing a few hairs.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; compressed slightly; acuminate; 4 mm long; 2 mm wide; falling entire.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface pubescent; hairy below. Lower glume apex acuminate. Upper glume ovate; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume surface villous; hairy between veins (outer). Upper glume margins villous. Upper glume hairs 1 mm long. Upper glume apex acuminate.

FLORETS Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 5 -veined; pilose; hairy between veins but central interspaces glabrous; ciliate on margins; acuminate. Fertile lemma elliptic; 2.5 mm long; 1.5 mm wide; indurate; without keel. Lemma surface rugose. Lemma margins involute. Lemma apex obtuse; mucronate. Principal lemma awn 1 mm long overall; limb puberulous. Palea involute; indurate; without keels. Palea surface rugose.

DISTRIBUTION North America: Mexico.

NOTES Paniceae. Chase.

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