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Arabis

 

Arabis

For the Royal New Zealand Navy corvette, see HMNZS Arabis (K 385).
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Arabis ferdinandi-coburgii
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Brassicales
Family: Brassicaceae
Genus: Arabis
Adans.
Species

See text

Arabis /ˈɛərəbɨs/,[1] or rockcress, is a genus of flowering plants, within the family Brassicaceae, subfamily Brassicoideae.

Though traditionally recognized as a large genus with many Old World and New World members, more recent evaluations of the relationships among these species using genetic data suggest there are two major groups within the old genus Arabis. These two groups are not each other's closest relatives, so have been split into two separate genera. The Old World members all remain in the genus Arabis, whereas most of the New World members have been moved into the genus Boechera, with only a few remaining in Arabis.

The species are herbaceous, annual or perennial plants, growing to 10–80 cm tall, usually densely hairy, with simple entire to lobed leaves 1–6 cm long, and small white four-petalled flowers. The fruit is a long, slender capsule containing 10-20 or more seeds.

Some species, notably A. alpina, are cultivated as ornamental plants in gardens. Many others are regarded as weeds.


Selected species
  • Arabis pinzliae
  • Arabis planisiliqua
  • Arabis platysperma
  • Arabis procurrens (spreading rock cress)
  • Arabis pterosperma
  • Arabis puberula
  • Arabis pulchra
  • Arabis pycnocarpa (sleder rock cress)
  • Arabis pygmaea
  • Arabis recta (annual rockcress)
  • Arabis repanda
  • Arabis rollei
  • Arabis scabra (Bristol rockcress)
  • Arabis serotina
  • Arabis serrata
  • Arabis shockleyi
  • Arabis subpinnatifida
  • Arabis suffrutescens
  • Arabis tibetica
  • Arabis tiehmii
  • Arabis tricornuta
  • Arabis turrita (tower rockcress)

References


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