bio.wikisort.org - Plant

Glandora diffusa, the purple gromwell, syn. Lithodora diffusa, Lithospermum diffusa, is a species of flowering plant in the family Boraginaceae. It is a mat-forming perennial growing to 15 cm (6 in) tall by 60 cm (24 in) or more wide, with dark green, hairy evergreen leaves and masses of blue or white 5-lobed flowers. It is suitable for cultivation in a rock garden or alpine garden.[1]

Glandora diffusa
G. diffusa, Osaka Prefectural Flower Garden, Japan
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Boraginales
Family:	Boraginaceae
Genus:	Glandora
Species:	G. diffusa
Binomial name
Glandora diffusa (Lag. ) I.M.Johnst.

Although there is a variety with white flowers, G. diffusa var. alba,[2] the blue-flowered varieties are most valued in gardens for the intense azure color of their abundant blooms. A number of cultivars have been developed for garden use.[3]

Glandora diffusa is hardy down to −15 °C (5 °F) (USDA zones 6 - 8),[2] and requires a position in full sun. It needs a well-drained acid or neutral soil, as it is susceptible to root rot. It requires vernalization to flower.[4]

The ancient Greek term lithodora literally means "stone gift", referring to its preferred habitat. Diffusa means "spreading", and refers to the plant's growth habit.[5]

References

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