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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Eustachys neglecta

HABIT Perennial. Basal innovations flabellate. Culms erect; 70–120 cm long; 3 -noded. Lateral branches lacking. Leaf-sheaths keeled; striately veined. Ligule a ciliolate membrane. Leaf-blades conduplicate; 10–20 cm long; 5–9 mm wide. Leaf-blade margins scaberulous. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 4–6; digitate; ascending; unilateral; 8–15 cm long. Rhachis angular. Spikelet packing broadside to rhachis; crowded; regular.

Spikelets pectinate; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.

GLUMES Glumes persistent; dissimilar; shorter than spikelet; thinner than fertile lemma; gaping. Lower glume elliptic; 1.2 mm long; 0.66 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex emarginate; mucronate. Upper glume oblong; 2.5 mm long; 0.9–1 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume surface puberulous. Upper glume apex lobed; 2 -fid; obtuse; awned; 1 -awned. Upper glume awn 1 mm long.

FLORETS Fertile lemma elliptic; laterally compressed; 2.5–2.8 mm long; chartaceous; light brown; keeled; 3 -veined. Lemma midvein pubescent; hairy below. Lemma margins pubescent; hairy above. Lemma hairs 0.7 mm long. Lemma apex emarginate; mucronate, or awned; 1 -awned. Principal lemma awn subapical; 0.5–1 mm long overall. Palea 0.9 length of lemma; 2 -veined. Apical sterile florets 1 in number; barren; cuneate; 1.5–2 mm long. Apical sterile lemmas truncate; awned; 1 -awned. Apical sterile lemma awns 0.5–1 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid; trigonous; 1.5 mm long.

DISTRIBUTION North America: southeast USA.

NOTES Cynodonteae. Nash 2000.

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