All Floras      Advanced Search
FOC Vol. 20-21 Page 234, 237 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 20-21 | Asteraceae | Lactuca

10. Lactuca sibirica (Linnaeus) Bentham ex Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg. 19: 528. 1874.

山莴苣 shan wo ju

Sonchus sibiricus Linnaeus, Sp. Pl. 2: 795. 1753; Lagedium sibiricum (Linnaeus) Soják; Mulgedium kamtschaticum Ledebour; M. sibiricum (Linnaeus) Lessing.

Herbs 50-100 cm tall, perennial, with a taproot. Stem usually pale purplish red, erect, branched apically, glabrous, regularly leafy. Leaves thin, glabrous, abaxially glaucous green, adaxially green. Lower and middle stem leaves sessile, lanceolate, narrowly elliptic-lanceolate, or narrowly oblong-lanceolate, 10-26 × 2-3 cm, undivided or more rarely sinuate-dentate to pinnately lobed, base attenuate, auriculately or sagittately clasping, margin entire to faintly denticulate, apex acute to acuminate. Upper stem leaves similar to middle stem leaves but smaller. Synflorescence corymbiform to corymbosely paniculiform, with many capitula. Capitula with ca. 20 florets. Involucre cylindric, 0.9-1.3 cm. Phyllaries often purplish tinged or mottled; outer phyllaries triangular-ovate to lanceolate, apex acute; inner phyllaries ca. 8, apex subobtuse. Florets blue, rarely white. Achene brown to olive green, narrowly ellipsoid, ca. 4 mm, subcompressed, either marginal rib almost as thick as ca. 1/3 of achene diam., middle third with 4 or 5 narrow ribs on either side, apically attenuate or with a ca. 1 mm beak. Pappus 5-7 mm. Fl. and fr. Jul-Sep. 2n = 18*.

Forests, forest margins, meadows, riverbanks, moist places, by lakes; 300-2100 m. Gansu, Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Qinghai, Shaanxi, Shanxi, Xinjiang [Japan, Kazakhstan, Korea, Mongolia, Russia; N and NE Europe].


 

Related Objects Image Gallery 
  • Illustration
  • Illustration
  • Illustration
  • Illustration

    Flora of China @ efloras.org
    Browse by
    Volume
    Family
    Genera
    Advanced Search


    Flora of China Home


    Checklist

     

     

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |