Stipa hohenackeriana (Gintzburger et al., 2003)

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Poa bulbosa
Gintzburger et al., Rangelands in Uzbekistan, 2003
Stipa hohenackeriana (Gintzburger et al., 2003)
Atraphaxis spinosa
Stipa hohenackeriana
Stipa hohenackeriana

Stipa hohenackeriana Trin. et Rupr.

Local name:

  • Russian: Ковыль Гогенакера, деле, боз, кулан-куде - kovyl' gogenakera, dele, boz, kulan-kude
  • Turkmen: Dele
  • Uzbek, Kazakh: Boz, Kulan, Kude, Chalovi

Chromosome number: 2n = 22, 44 (Fedorov 1969).

Description and morphology: Perennial open bunchgrass (height up to 80 cm). Leaves: rigid, blades linear, long acuminate; wrapped thyroid-like (20–40 cm); sheaths woolly-pubescent or glabrous, usually curled around stem at base. Inflorescence: panicle 15–20 (2 cm), with numerous linear-lanceolate spikelets (10–12 mm long). Long flexible awns (4–5 cm), overlapping at maturity. Flower: bisexual; 3 stamens with long anthers; short terminal style. Pollen grains 3-celled, orbiculate-oblong, monoporous. Ovule anatropous, crassinucellate, bitegmic. Vegetative growth mostly in March.

Reproduction: Sexual. Anemophilous. Flowering: May. Fruit maturation: May–June. Fruit: indehiscent, monospermous kernel, ovoidlanceolate, 3-edged (1.2–1.4 mm), light yellow with hulled fruiting body assembled in flower. Inflorescence: bent down wards. Seed: well differentiated, erect embryo and endosperm. Dormancy B1 type. Viable seed: 67–80%. Short-term stratification at variable temperatures (20/30 °C, night/day) in 12 hour (dark/light) cycles (5–10 °C/28 °C) increases germination. Seed viability 8–9 years.

Pastoral importance: Good palatability all year round and especially in spring and early summer; reputed to be good grazing and energy-providing forage for all livestock in winter during snowy periods when the old leaves are softened. Expected yield in good stands is about 0.3–0.45 t DM/ha.

Fodder value: Medium quality. At flowering contains (% DM): crude protein 8.4–18; fibre 7.3–14; fat 2.9–4.1; cellulose 25–34; nitrogenfree extract 37–51; ash 7.2–7.8. Forage value estimated at 65 FU and 11.3 kg digestible protein/ 100 kg DM.

Habitat: Xerophyte. Common in arid and semiarid flats and plains; also on hill slopes and dry mountains. Occurs on fixed and compact sandy soils. Vicariant of North African Stipa lagascae and/or S. parviflora.

Distribution: Middle Asia, East and South Caucasus, West Siberia and Iran.