Convolvulus hamadae (Gintzburger et al., 2003)

From PlantUse English
Jump to: navigation, search
Convolvulus divaricatus
Gintzburger et al., Rangelands in Uzbekistan, 2003
Convolvulus hamadae (Gintzburger et al., 2003)
Juniperus turkestanica
Convolvulus hamadae
Convolvulus hamadae
Convolvulus fruticosus
Convolvulus fruticosus

Convolvulus hamadae V. Petr.

Local name:

  • Russian: Bьюнок пустыни, партек - v'junok pustyni, partek
  • Uzbek: Partek

Chromosome number: 2n = 24 (Persy 1936; Fedorov 1969).

Description and morphology: Semi-shrub (height 15–35 cm). Stem: highly pubescent. Leaves: alternate, small, almost sessile, reduced to scale with serrate margins. During the dry season, deciduous leaves. Assimilating function on annual stems. Flowers: bisexual; pinkishwhite, large, pentamerous, assembled in a terminal dihazium. Budding, flowering and fruiting stages longer than in C. divaricatus. Growth period lasts about 7 months.

Reproduction: Sexual. Entomophilous. Flowering and fruit maturation: June–September. Seeds: treatment with alternate temperatures (10 °C and 0 °C or 25 °C and 10 °C) and mechanical destruction of seed coat significantly increase germination.

Pastoral importance: Grazed by sheep and camels in autumn-winter after rains.

Fodder value: Contains high percentage of protein in summer, decreasing in autumn; cellulose (40%) at flowering. Fodder value lowest in late summer. Ash contains large amount of Ca, K and Na and low P. Alkaloids (gamadin and gigrin) present in root.

Habitat: Gypso-xerophyte. Occurs on gravel and loamy sand flats.

Distribution: Central Asia (Zerafshan valley, Kyzylkum, Karakum), Pamir-Alai and Iran.

Other: Convolvulus sp.