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.

Bothriochloa imperatoides

HABIT Perennial. Culms 60–65 cm long; 3 mm diam. Culm-nodes bearded. Leaves mostly basal. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane; 1.1–1.6 mm long. Leaf-blades 2.5–14 cm long; 2–3 mm wide. Leaf-blade surface pilose; hairy on both sides.

INFLORESCENCE Inflorescence composed of racemes.

Racemes numerous; borne along a central axis; closely spaced; in a multilateral false spike; 2–4 cm long. Central inflorescence axis 3–4 cm long. Rhachis fragile at the nodes; flattened; villous on margins. Rhachis hairs 7.2–8.3 mm long. Rhachis internodes filiform; 2.9–3.1 mm long. Rhachis internode tip transverse.

Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; flattened; 3–4 mm long; with a translucent median line (also present in internodes); villous; with 7.9–8.3 mm long hairs.

STERILE SPIKELETS Companion sterile spikelets represented by single glumes; linear; 3.1 mm long; shorter than fertile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4.1–4.6 mm long; 1.1 mm wide; falling entire; deciduous with accessory branch structures. Spikelet callus bearded; base obtuse; attached transversely. Spikelet callus hairs 3–3.9 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; cartilaginous; without keels; keel-less except near apex; 8–12 -veined. Lower glume surface flat; pilose; hairy below. Lower glume hairs 3.1–3.3 mm long. Upper glume lanceolate; 1-keeled.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline. Fertile lemma linear; hyaline; without keel. Lemma apex entire; awned; 1 -awned. Principal lemma awn apical; geniculate; 16.9–18.1 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 3.

DISTRIBUTION South America: Brazil and southern South America.

NOTES Andropogoneae. Scrivanti 2012.

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