GrassBase - The Online World Grass Flora

Descriptions

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

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

Stipa hohenackeriana

HABIT Perennial; caespitose. Butt sheaths pubescent; persistent and investing base of culm; with compacted dead sheaths. Culms 40–80 cm long. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 2–4 mm long. Leaf-blades filiform; involute; 10–20 cm long; 1–2 mm wide. Leaf-blade surface scaberulous; rough abaxially; pubescent; sparsely hairy. Leaf-blade apex hardened.

INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.

Panicle contracted; lanceolate; 10–20 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 20–35 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 2.5 mm long; pilose; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; shiny. Lower glume lanceolate; 20–35 mm long; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 20–35 mm long; 1.6–2.3 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 12–15 mm long; coriaceous; without keel; 5 -veined. Lemma surface pilose; hairy below. Lemma margins convolute; covering most of palea. Lemma apex acute; awned; 1 -awned. Principal lemma awn bigeniculate; 100–180 mm long overall; with twisted column; deciduous; limb ciliate (limb); with 2 mm long hairs. Column of lemma awn glabrous. Palea 1 length of lemma; 2 -veined; without keels.

FLOWER Lodicules 3. Anthers 3; anther tip smooth. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform. Hilum linear.

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

NOTES Stipeae. Fl Iran.

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