Hormathophylla spinosa

Hormathophylla spinosa, formerly Alyssum spinosum, the spiny madwort, is a species of flowering subshrub in the genus Hormathophylla of the family Brassicaceae, native to open rocky sites in south-eastern France and southern Spain. It forms a compact mound up to 30 cm in height. Dense spiny branches of tiny, toothed grey-green leaves bear racemes of white flowers at the tips in early summer.[1]

Alyssum spinosum
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Rosids
Order:	Brassicales
Family:	Brassicaceae
Genus:	Hormathophylla
Species:	H. spinosum
Binomial name
Hormathophylla spinosum L.
Synonyms
List Adyseton spinosum (L.) Link Alyssum spinosum L. Anodontea spinosa (L.) Sweet Clypeola spinosa (L.) Link Draba spinosa (L.) Lam. Koniga spinosa (L.) Spach Ptilotrichum spinosum (L.) Boiss.

It is especially cultivated in rock gardens. The cultivar H spinosa 'Roseum',[2] with pink flowers, has gained the Royal Horticultural Society's Award of Garden Merit.

• 
  'Purpureum'
• 
  'Roseum'

References

1. RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 978-1405332965.
2. "RHS Plant Selector - Hormathophylla spinosa 'Roseum'". Royal Horticultural Society. Retrieved 12 February 2020.