Hubbardia heptaneuron

HABIT Annual. Culms prostrate; rooting from lower nodes. Ligule absent. Leaf-blades lanceolate; 1–3 cm long; 2–6 mm wide; flaccid. Leaf-blade surface pubescent. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle; comprising 1–10 fertile spikelets.

Panicle open; bearing few spikelets. Panicle branches capillary.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; obtuse, or acute; 2–3 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; exceeding apex of florets; similar to fertile lemma in texture. Lower glume elliptic; 1 length of upper glume; 1 length of spikelet; membranous; without keels; 5–7 -veined. Lower glume lateral veins ribbed. Lower glume surface pubescent; hairy between veins; with tubercle-based hairs. Lower glume apex obtuse. Upper glume elliptic; 1.1 length of adjacent fertile lemma; membranous; without keels; 5–7 -veined. Upper glume lateral veins ribbed. Upper glume surface pubescent; hairy between veins; with tubercle-based hairs. Upper glume apex obtuse.

FLORETS Basal sterile florets barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret similar to fertile lemma; elliptic; 2–2.5 mm long; membranous; much thinner above; 7–9 -veined; obtuse. Fertile lemma elliptic; 2–2.5 mm long; membranous; much thinner above; without keel; 7–9 -veined. Lemma apex obtuse.

FRUIT Caryopsis with adherent pericarp; fusiform; isodiametric; biconvex; 1.25 mm long. Embryo 0.3 length of caryopsis. Hilum elliptic.

DISTRIBUTION Asia-tropical: India.

NOTES Hubbardieae. Bor.

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