Stipa haussknechtii

HABIT Perennial. Culms 15–30 cm long. Lateral branches lacking. Ligule an eciliate membrane. Leaf-blades involute; 10–20 cm long; 2–3 mm wide; stiff. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate. Primary panicle branches spreading; 2–3 -nate. Panicle branches capillary.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 11–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; glabrous; unequally 2-toothed.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; pallid; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 11–12 mm long; membranous; pallid; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 6 mm long; membranous; without keel; 5 -veined. Lemma surface pubescent. Lemma margins flat; covering most of palea. Lemma apex dentate; 2 -fid; surmounted by a ring of hairs; awned; 1 -awned. Principal lemma awn from a sinus; bigeniculate; 90 mm long overall; with twisted column. Column of lemma awn 30 mm long; puberulous. Palea 0.6 length of lemma; 2 -veined; without keels.

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

FRUIT Caryopsis with adherent pericarp; fusiform. Hilum linear.

DISTRIBUTION Asia-temperate: western Asia.

NOTES Stipeae. Fl Iran 1995.

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