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Descriptions

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

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

Danthoniopsis scopulorum

HABIT Perennial; caespitose; clumped densely. Culms erect; 30–40 cm long; 3 -noded. Culm-internodes distally glabrous. Culm-nodes glabrous. Lateral branches sparse. Ligule a fringe of hairs. Leaf-blades filiform; involute; 10–20 cm long; 1–2 mm wide. Leaf-blade apex filiform.

INFLORESCENCE Inflorescence a panicle; comprising 40–70 fertile spikelets.

Panicle open; lanceolate; 5–10 cm long. Primary panicle branches 2–3 -nate.

Spikelets in threes. Fertile spikelets pedicelled; 3 in the cluster. Pedicels unequal; scabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 8–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent; truncate.

GLUMES Glumes persistent; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate, or oblong; 6 mm long; 0.66 length of upper glume; chartaceous; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 1 length of spikelet; chartaceous; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Basal sterile florets male; with palea; separately deciduous. Lemma of lower sterile floret similar to upper glume; lanceolate; 8.5 mm long; 1 length of spikelet; membranous; 7 -veined; acute. Fertile lemma oblong; 6 mm long; coriaceous; without keel; 5–7 -veined. Lemma surface pilose; with a transverse row of hair tufts; bearing 8 hair tufts in all. Lemma margins involute; interlocking with palea keels. Lemma apex lobed; 2 -fid; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; flat below; 14 mm long overall; with twisted column; persistent. Column of lemma awn 4 mm long. Lateral lemma awns arising on apex of lobes; 1 mm long; shorter than principal. Palea 5 mm long; 2 -veined. Palea keels approximate; thickened; winged; narrowly winged. Palea surface pubescent; hairy on back.

FLOWER Lodicules 2; 0.5 mm long. Anthers 3; anther tip smooth. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Africa: south.

NOTES Arundinelleae. Phipps 1997.

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