Stipa baicalensis

HABIT Perennial; caespitose; clumped densely. Culms (15–)50–70(–100) cm long. Culm-internodes smooth. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1–1.6 mm long. Leaf-blades filiform; involute; 15–30 cm long; 0.4–0.7 mm wide. Leaf-blade surface ribbed; smooth, or scaberulous; rough abaxially; pubescent; densely hairy; hairy adaxially. Leaf-blade apex acuminate; hardened.

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

Panicle contracted; linear; 10–30 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 22–32 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; without keels. Lower glume apex acuminate. Upper glume lanceolate; 22–32 mm long; membranous; without keels. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 12–18 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy below; hairy in lines. Lemma margins convolute; covering most of palea. Lemma apex surmounted by a ring of hairs; awned; 1 -awned. Principal lemma awn bigeniculate; (70–)110–120(–280) mm long overall; with twisted column. 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 far east, China, and Mongolia.

NOTES Stipeae. Fl USSR 1995.

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