Jansenella neglecta

HABIT Annual; caespitose. Culms erect, or geniculately ascending; slender; 10–40 cm long; rooting from lower nodes. Culm-nodes glabrous. Leaf-sheaths 1–2.5 cm long; outer margin hairy. Ligule an eciliate membrane. Leaf-blade base amplexicaul. Leaf-blades lanceolate; 1.5–5 cm long; 3.5–10 mm wide. Leaf-blade margins ciliate; hairy at base. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; dense; 2–3 cm long.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels unequal.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong, or ovate; laterally compressed; 7–12 mm long; 3–4.2 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; with lower wider than upper; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 5–6.5 mm long; 0.6 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface pilose; with tubercle-based hairs. Lower glume apex acute; awned; 1 -awned. Lower glume awn 1.6–2 mm long. Upper glume lanceolate; 8–10 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 3–5 -veined. Upper glume surface pilose; with tubercle-based hairs. Upper glume apex acute; awned; 1 -awned. Upper glume awn 3–3.5 mm long.

FLORETS Basal sterile florets male, or barren; with palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; lanceolate; 6.5–7.5 mm long; 0.9 length of fertile lemma; membranous; 3 -veined; awned. Awn of lower sterile floret 1.4–2.6 mm long. Palea of lower sterile floret 4–5 mm long; winged on keels (narrowly); pilose; adorned on flanks. Fertile lemma oblong; 7.5–9 mm long; 1.8–2 mm wide; coriaceous; without keel; 3 -veined. Lemma surface pilose; hairy at base; with marginal hair tufts; bearing 2 hair tufts in all. Lemma margins involute; interlocking with palea keels. Lemma hairs white, or tawny. Lemma apex lobed; 2 -fid; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; flat below; 15–18 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 3–4 mm long; shorter than principal. Palea 4.2–4.5 mm long; 2 -veined. Palea keels winged; narrowly winged. Palea surface scabrous. Palea apex dentate; 2 -fid.

FLOWER Anthers 3; 1 mm long. Stigmas 2. Styles 1.2–1.4 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid; dorsally compressed; plano-convex; 2–2.5 mm long. Embryo 0.5 length of caryopsis. Hilum punctiform.

DISTRIBUTION Asia-tropical: India.

NOTES Arundinelleae. Yadav et al 2011.

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