Eulalia fastigiata

HABIT Perennial. Culms 100–150 cm long. Leaf-sheaths as wide as blade at the collar. Leaf-sheath oral hairs bearded. Ligule a ciliolate membrane. Leaf-blades erect; 30–60 cm long; 5–7 mm wide; stiff; glaucous. Leaf-blade midrib widened. Leaf-blade surface scabrous; rough abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes. Peduncle pubescent above.

Racemes numerous; borne along a central axis; 5–10 cm long. Central inflorescence axis 10 cm long. Rhachis fragile at the nodes; subterete; ciliate on margins. Rhachis hairs white. Rhachis internodes linear. Rhachis internode tip oblique.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels linear; angular; ciliate.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4–5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus square; pilose; base obtuse; attached obliquely.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; chartaceous; 2-keeled; keeled above. Lower glume intercarinal veins absent, or obscure. Lower glume surface concave; villous. Lower glume hairs white. Lower glume apex dentate; 2 -fid. Upper glume lanceolate; chartaceous; with membranous margins; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume surface pilose; hairy above. Upper glume hairs white. Upper glume apex acute, or acuminate; muticous.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 3.5–4.5 mm long; 0.75 length of spikelet; membranous; eciliate on margins, or ciliolate on margins. Fertile lemma oblong; 2–2.5 mm long; hyaline; without keel; 3 -veined. Lemma margins ciliate; hairy above. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 12.5 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 3; 2–2.5 mm long.

DISTRIBUTION Asia-tropical: India, Indo-China, and Papuasia.

NOTES Andropogoneae. Bor.

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