''Helianthemum apenninum'', the white rock-rose, is a white-flowering
rock rose Rock rose, rock-rose, and rockrose are common names of various plants, including:
* Cistaceae
* ''Cistus''
* ''Halimium''
* ''Helianthemum''
* ''Pavonia lasiopetala''
* ''Phemeranthus''
* ''Portulaca grandiflora''
{{Plant common name ...
of the family
Cistaceae
The Cistaceae are a small family of plants (rock-rose or rock rose family) known for their beautiful shrubs, which are profusely covered by flowers at the time of blossom. This family consists of about 170(-200) species in eight genera that are ...
found in the North Atlantic region, mainly in dry grassy and rocky places across large parts of Europe.
''Helianthemum apenninum'', is a self supporting, semi-woody shrub that may grow up to 0.5 meters high and roots 0.3 meters deep. It follows a perennial life cycle.
It flowers from March to July and produces pentamerous flowers, white with yellow centers and yellow
stamen
The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10
Morphology and terminology
A stamen typically consists of a stalk called the filament ...
s and up to 30 mm across. The three outer sepals are hairy and striped; the 2 inner sepals are very small. The flowers grow in clusters of 3 to 10 on a stem.
The flowers are visited by
Marsh Marygold Moth (''Micropterix calthella'').
It produces
Dry fruits
In botany, dry fruits are fruits which have a hard, dry pericarp around their seeds, these commonly disperse via wind with help of 'wings' and 'parachutes' or via animals with help of hooks which latch on animal fur or when seeds are consumed by ...
with seeds (average 0.9 mg) that are dispersed through
autochory (un-assisted or gravity-assisted dispersion).
It is photoautotroph and an
Evergreen Plant (maintains foliage throughout the year). The leaves are small (around 30 mm), linear/lance-shaped, in opposite pairs. They are covered with greyish or whitish hairs, especially on the underside, and the edges are rolled under.
References
External links
Helianthemums.co.uk for further information on Helianthemums* https://www.gbif.org/species/7949730
apenninum
Taxa named by Philip Miller
{{Malvales-stub