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Descriptions

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

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

Henrardia pubescens

HABIT Annual; caespitose. Culms erect, or geniculately ascending; 10–15 cm long. Leaf-sheath oral hairs lacking. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 1 mm long. Leaf-blades flat, or convolute; 3–5 cm long; 1.5–2.5 mm wide.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; erect; straight, or arcuate; smoothly terete; bilateral; 6–8 cm long. Rhachis fragile at the nodes; semiterete; 2 mm wide; puberulous on surface; scabrous on margins. Spikelet packing broadside to rhachis. Rhachis internodes oblong; 7–8 mm long. Rhachis internode tip transverse.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; dorsally compressed; 8–9 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes collateral; similar; with lower wider than upper; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; coriaceous; without keels; 5–7 -veined. Lower glume lateral veins ribbed. Lower glume surface hispidulous. Lower glume apex acute. Upper glume lanceolate; coriaceous; without keels; 5–7 -veined. Upper glume lateral veins ribbed. Upper glume surface hispidulous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 7–8 mm long; membranous; without keel; 5 -veined. Lemma surface scaberulous; rough on veins; puberulous; hairy below; with clavate hairs. Lemma apex acute. Palea surface pubescent. Rhachilla extension 0.2 length of fertile floret; pubescent.

FLOWER Lodicules 2; ovate; 1 mm long; membranous; ciliate; hairy across the apex. Anthers 3; 0.5–0.7 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; oblong; dorsally compressed; sulcate on hilar side; dark brown; hairy at apex. Embryo 0.3 length of caryopsis. Hilum linear; 1 length of caryopsis.

DISTRIBUTION Asia-temperate: Soviet Middle Asia, western Asia, and Arabia.

NOTES Triticeae. CEH.

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