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.

Poa jeremiadis

HABIT Perennial; caespitose; clumped loosely. Basal innovations extravaginal and intravaginal. Culms geniculately ascending; 9–23 cm long. Lateral branches lacking. Leaves mostly basal. Ligule an eciliate membrane; 0.75–1.4 mm long; glabrous on abaxial surface; acute. Leaf-blades erect; filiform; 4.5–7.5 cm long; 0.6–0.8 mm wide; stiff. Leaf-blade surface smooth. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 3.5–4 cm long; 1.5–2 cm wide. Primary panicle branches ascending, or spreading, or reflexed; 1–2 -nate; 1.3–1.9 cm long; bearing 4–6 fertile spikelets on each lower branch. Panicle branches smooth, or scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1–2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 3.3–4 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.75–1.35 mm long; smooth. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1.85–2.15 mm long; 0.8–0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface smooth. Lower glume apex acute. Upper glume ovate; 2.25–2.5 mm long; 0.8–0.9 length of adjacent fertile lemma; membranous; 1-keeled; 3(–5) -veined. Upper glume surface smooth. Upper glume apex acute.

FLORETS Fertile lemma ovate; 2.9–3.15 mm long; membranous; keeled; 5(–7) -veined. Lemma surface smooth. Lemma apex acute. Palea keels smooth. Rhachilla extension 1.1–1.5 mm long.

FLOWER Lodicules 2; membranous. Anthers 3; 0.6 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Poeae. Veldkamp 1995.

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