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Pakistan | Family List | Brassicaceae | Arabidopsis

Arabidopsis himalaica (Edgew.) O.E. Schulz in Engl., Pflanzenr. 86 (IV. 105): 283. 1924. in Engl. & Prantl, l.c. 641; Hedge in Rech. f., l.c. 233.

  • Arabis himalaica Edgew.
  • Arabis rupestre Edgew.
  • Sisymbrium himalaicum (Edgew.) Hook. f. & Thoms.
  • Sisymbrium rupestre (Edgew.) Hook. f. & Thoms.

    Biennial or perennial, 20-50 cm tall, often much branched from the base with branches ascending, usually densely hispid with simple and branched hairs. Leaves often more coarsely toothed and green than in Arabidopsis mollissima. Racemes and flowers similar as in Arabidopsis mollissima but mostly bracteate up to the apex; pedicels up to 10 (-15) mm long in fruit, spreading. Siliquae linear, subterete, (10-) 15-30 (-40) mm long, c. 1 mm broad, glabrous or sometimes sparsely pubescent; valves 1-veined, subconvex; style c. 0.5 mm long with depressed, sub-bilobed stigma; septum 1-veined; seeds 25-50 in each locule, c. 0.7 mm long.

    Fl. Per.: May-June.

    Type: Himalaya, Mana, Edgeworth (K).

    Distribution: Pakistan and throughout Himalayas.

    Differs from the previous 2 species by its bracteate inflorescence and usually many branches from the base. Intermediate forms are not lacking. In its bracteate habit it also resembles Microsisymbrium axillare (Hook. f. & Thoms.) Schulz, a central and E. Himalayan species, but taller and rigid habit with longer siliquae are distinctive, in addition to the technical character of mucilaginous seeds. A link species suggesting the merger of Microsisymbrium into Arabidopsis, because non mucilaginous seeds have already been reported in a few species of Arabidopsis.


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