Catananche coerulea L. - a new ornamental species
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2023-04-28 16:04
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SÎRBU, Tatiana. Catananche coerulea L. - a new ornamental species. In: Conservation of plant diversity, Ed. 4, 28-30 septembrie 2015, Chișinău. Chișinău: Gradina Botanica (Institut), 2015, Ediția 4, p. 102. ISBN 978-9975-3036-8-2.
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Conservation of plant diversity
Ediția 4, 2015
Simpozionul "Conservation of plant diversity"
4, Chișinău, Moldova, 28-30 septembrie 2015

Catananche coerulea L. - a new ornamental species


Pag. 102-102

Sîrbu Tatiana
 
Botanical Garden (Institute) of the Academy of Sciences of Moldova
 
 
Disponibil în IBN: 15 mai 2019


Cuvinte-cheie
introduction, Catananche caerulea, cultivation, propagation, use


Teza

The process of introduction of indigenous and, especially, of alien plants in culture, is a continuous, difficult one and doesn’t always give positive results. In 2006, the Floriculture Laboratory of the BG (I) of the ASM received a lot of seeds for testing, offered by the State Commission for Variety Testing of Ministry of Agriculture of the Republic of Moldova. Catananche caerulea L. seeds were purchased from the Romanian company "Agrosel" by entrepreneurs from our country for commercial purposes. They were tested in order to determine quality indices and plant health. It was found that the germination power of the received seeds amounted to 15%. The percentage of germination was 65%. The seeds were clean, without any mixtures or plant debris. Any pathogens or pests weren’t identified. The next year, seeds were sown in greenhouses (in February) in boxes. The obtained seedlings were transplanted into the experimental field of the laboratory in May. Most of them reached the generative phase in the same year. The current population consists of six mature, well branched plants, which vegetate, flourish and fructify, thus undergoing all phases, stages and periods of the ontogenetic cycle. Catananche L. genus comprises only 5-6 recognized annual and perennial herbaceous species: C. arenaria Coss.&Durieu, C. caerulea L., C. caespitosa Desf., C. lutea L., C. montana Coss.&Durieu. The taxonomic rank of the studied species: family: Asteraceae, subfamily: Cichorioideae, genus: Catananche, species: Catananche caerulea (syn. Cupidonia caerulea (L.) BUB. [3]. The name of this genus is of Greek origin and means “flower of love”. Common name: Cupid's dart. Some sources say that this plant contains substances with aphrodisiac effects and that it was used by the Greeks for this purpose [2]. C. caerulea is a perennial species, native to Southern and Southwestern Europe. Camephyte, xerophyte, calciphile. It grows on limestone slopes. It is grown as an ornamental plant in gardens since the sixteenth century [1, 3, 4]. Under the climate and soil conditions of our country, this plant grows 7090 cm tall. The bushes are densely branched, semi-spreading. The whole plant is covered with numerous hairs; the stems and the underside of leaves are greyish. Radical leaves are arranged in dense rosettes. Leaves are narrow, unusually toothed (leaves look like tiny swords), 20-26 cm long. Cauline leaves are shorter (4-14 cm). The growing season starts in the middle or end of March. Budding occurs in May-June. It blooms from the middle of June to August-September. The flower heads are not too big, 2.5-3.5 cm, with about 25 flowers (around 2 cm) of blue-lavender colour. Flowers are bisexual, selfpollinating. Pistils have bifurcate, pubescent stigmas. Androceum is made up of five concrescent stamens, shorter than the pistil. The involucre comprises over 40 transparent, nacreous, scarious, decorative bracts. The bracts from the base (4-5 mm) are almost circular and those situated close to the petals (6-7 mm) are elongated, all acuminate, with well defined brown central rib. The centre of inflorescences is darker and creates an interesting colour contrast. A floral stem has 9-15 inflorescences. There are over 150 long pedunculate flower heads of different order on a bush. Seeds are viable. Fruits are brown, villous, 3-4 mm long achenes. The pappus consists of 6-7 scales. From all the flowers in a flower head, 10 to 17 seeds are formed.   This species prefers sunny, well drained slopes. It is undemanding towards substrate, but grows and develops better on calcareous and neutral soils. It can reproduce by seeds, which are planted directly into the soil in early summer. Plants will bloom next year. If seeds are sown in greenhouses during January-March, plants bloom in the same year. It is indicated to divide the bush in spring, when the threat of frost has passed, but we can also do it in autumn. A simple and effective method of obtaining a larger amount of plants is taking cuttings in summer or autumn. The planting distance is 3550 cm. In autumn, after seed harvesting, the stems can be removed, leaving only the rosettes. Plants are irrigated and the soil is loosened in the usual way. In spring and summer, fertilizers are applied once a month. Plants are resistant to diseases, pests and adverse environmental conditions.  C. caerulea is a new ornamental species for our country. We recommend it for rustic gardens, rock gardens, floral decorations or flowerbeds. Also it can be promoted as a cut flower, can be used in bouquets of fresh and dried flowers.