The total number of species used as brooms in study areas is about 108, as some of the taxa are referred to as "spp." species plural. The list includes two (2) fungi taxa: Melampsorella caryophyllacearum J. Schrot and Taphrina spp. which caused pathogen defense structures used as brooms. A high species diversity of 106 taxa of vascular plants in the research areas is established, belonging to 37 families and 74 genera.

Due to different level and state of ethnobotanical knowledge in the countries included in the research area, great difference among them regards the number of established taxa is registered: Bulgaria (28) (Table 1), Italy (74) (Table 2), Macedonia (1) and Romania (9) (Table 3). For this reason comparative analysis of species number and diversity is not appropriate.

Most of the plants, with the exception of Pteridium aquilinum (Pteridophyta), are representative of Magnoliophyta. The participation of Gymnosperms (5.4%) is insignificant. Monocotyledonae are present with 5 families (13.5%) and Dicotyledonae with 29 families (78.4%). The predominant number of species is from Poaceae (10), Asteraceae (9), Fabaceae (8), Ericaceae (9), Apiaceae (7), Betulaceae (5), Chenopodiaceae (5) and Salicaceae (5). The rest of the families contain 1–4 species (Fig. 2).

Hemicryptophytes species prevail (34), followed by chamaephytes (33) (evergreen shrubs (17) and shrubs (16)), therophytes (16) and phanerophytes (13) (Fig. 3). The structure of the life forms of the established species is according to the research areas' specific conditions. On the other hand the life form's structure corresponds to the plant's diversity with features suitable for certain broom qualities – strength and flexibility.

Witches' brooms are a special case. They are deformities on trees or shrubs as a result of infections by different agents. The rates of plant growth, size and symmetry are disrupted. A certain part of the plant may look like a bird's nest (closely packed distorted twigs) (Figs. 4, 5). These formations are very suitable in terms of shape, strength and flexibility for broom material 25. In the past, mysterious and unexplainable occurrences were often blamed on witchcraft. Witches' brooms occur on many different woody plant species, including deciduous trees such as hackberry, maple, and willow, and conifers such as pine and spruce. At first, only the appearance of the shrub is affected, but continued feeding over a period of years often stunts the honeysuckle's growth, eventually weakening it and contributing to the shrub's death 25. Most of the species are wild plants (78.4%). Some of them are cultivated for different needs (10.8%) as food and ornamental, except Sorghum bicolor and Bassia scoparia which are cultivated only for making brooms. The main plant cultivated for brooms in the study area is Sorghum bicolor (on small areas). In Bulgaria the area for Sorghum cultivation never had exceeded thirty five thousand decare. One part of species is wild, but they meet together as well in a culture in the same area (9%). In Italy, the use of wild plants for making brooms is more common as a result of plant richness and national traditions. In other parts of study area the use of cultivated plants is wider.

The most mentioned plants to be used as brooms in study area are Bassia scoparia, Sorghum bicolor, Betula pendula, Cornus mas and Salix spp. (Bu, It, Ma and Ro). The most common wild plants that are used for broom making in Bulgaria and Italy include: Erica spp. and Cytisus spp. Some plants used in Italy are similar to known data for Spain, Portugal and Turkey, according to Mediterranean ecological conditions, as well Erica scoparia, Cytisus scoparius, Marrubium vulgare, Olea europaea, Verbascum spp., Cistus spp., Genista spp., Phillyrea angustifolia, Osyris alba, and etc. 10111213.

The registered species Bassia prostrata, Spiraea media and witches' brooms (caused by Melampsorella caryophyllacearum and Taphrina spp.) have not been referred before for the Bulgaria, according to the references (Table 1).

"M е т Л а" (metla) is the Bulgarian name for broom. The diminutive name is "м е т Л и ч k а" (metlichka), often used for smaller ones and in folklore tales and folklore songs, this is a proof of its great importance in people's daily customs and its position in their life. "Metlar" is used for broom-maker or broom-seller. Many plants used as brooms are called "metla" in Bulgarian; so are plants whose shape is similar to that of a broom (Asparagus spp., Poa spp., Lactuca spp., etc.) 16.

In central-southern Italy peculiar brooms used for sweeping farmyards are called "granate", see e.g. Salix alba 17. In the National Museum of Arts and Folk Traditions a broom ("granata") from Apulia region, probably made of Thymus capitatus, is kept.

Several plants in Italy are called with vernacular names that mean "broom": e.g. Bassia scoparia, "skova de fòrru"; Asparagus spp. "skòvas de axròba, skovàtsus"; Cytisus scoparius, "scopa, scopìglio"; Erica arborea, "scopinello, iskòpa"; Erica scoparia, "scopuccio" etc.; Genista radiata, "spazzole"; Helichrysum italicum, "skòva de Santa Maria"; Helleborus foetidus, "scopacci"; Thapsia garganica, "skòva de forru" etc.

In some cases the vernacular name comes directly from Latin language, for example: "munda domos" in Sardinia (Stachys glutinosa), because in Latin language: mundare = to clean; domus = house.

In central Italy the little broom for cleaning ovens is called "mùnnulo": it is also made of some toxic plants, e.g. Helleborus foetidus and Sambucus ebulus 18.

Making a broom is more than a plain activity, it is an art. Broom makers are familiar with broomcorn (morphological features, phenology, phytopathology, etc.). The observations gained on a plant are subsequently used in the production of brooms.

Sorghum bicolor is used for industrial manufacture only (Figs. 6, 7, 8). The part used is the panicle. In Bulgaria, it is miscalled "metlov klas" (panicle ear) in practice. The same name is used in some official documents. The panicle branches are called "zhitzi" (wires). Some broom-makers break the panicle stem (axis) under the first internodes, this causes faster blossoming and seed maturing – which results in better quality panicles for brooms. The gathering of the panicles with mature seeds determines the typical colour of the glumes (in the first half of September). People know that reddish colour of panicles is caused by plant louses (Aphis sp.) or that it is the natural colour of some varieties, brownish is a result of fungi diseases, etc. 19.

The panicles without seeds are dried in open, sunny places (commonly in yards). After drying, panicles are grouped and bound together in small sheaves with hemp cord, fiber, mulberry branches or metal wire.

The remaining stems are used for firewood and for making temporary roofs. Broomcorn produces a large amount of plant material. Stems and folia are used as forage for sheep and cattle. The seeds are good food for cattle and birds 192021.

The making of broom crafts is a men prerogative (rarely women). Also gypsies are known as good broom makers.

The region with the oldest traditions in broom planting and making (more than 200 years) is the village of Michaltzi (Veliko Tarnovo district, Bulgaria). In the middle of last century people called the village "Metlen – burg" (Broom-castle) as an analogue to some German towns, with typical Bulgarian sense of humour. The field work-free time is used – especially in winter – for broom making. The prepared brooms are used for barter; so are eggs in other villages. Six kinds of brooms from this region are known – common house broom, parson's broom, double broom, bettered "mihalska" broom, broom for dresses, attic broom. Models from foreign countries – Russia, Italy and Philadelphia – are imported for trade 19.

Well branched shrubby plants with strong, sinewy fibers and flexible twigs are selected for broom making (Ericaceae, Betulaceae, Fabaceae, Asteraceae, Rosaceae, Chenopodiaceae, Betulaceae, etc.) 19. Making shrubby brooms is simple. The stems are bound together with sinewy wands, twisting plant stems or fiber around them while still fresh (Figs. 9, 10, 11). They are used after drying 19. But in many cases a raw plant is used for shrubby brooms, it is available, and its technical quality is of no importance. These brooms are for private use, not for trade. This kind of brooms is typical of very poor and remote villages and districts.

Some kind of brooms for domestic and industrial use has different kinds of wooden handles (made of beech wood and linden, untreated beech wood or hornbeam wood).

In Sardinia, Italy, Arundo donax and Juniperus phoenicea stems are often used as handle respectively for Chamaerops humilis and Cistus monspeliensis brooms 22.

Some plants with strong fibres are locally used for binding: in Latium brooms made of Sorghum bicolor are bound with Rubus ulmifolius stem 23, while in Sicily Scabiosa atropurpurea stems are tied with Ampelodesmos mauritanicus leaves 24.

Brooms have a specific shape and working qualities. For these characteristics to be obtained different parts of the plants are used e.g.: stem (Genista radiata), branches (Salix alba), leaves (Chamaerops humilis), panicle (Sorghum bicolor) or aerial parts (Erica arborea).

In the past, plants of brooms have been growing at each house. Later, an one or several humans in the village or the region start to cultivate and make brooms, as a way to living. Small production workshops and manufactures are established gradually. Such more modern factories are present in nowadays. Their production comprises a wide range of straw brooms and brushes (for domestic and industrial use), different kinds of wooden broomsticks and details according to customers' wish. They export large quantities of the production (e.g. Greece) 19.

Local folk classifications (folk nomenclature) are result of daily experience of people using brooms. They called them soft and hard brooms, big and small brooms, depending on the type of plant they are made, their size and use. Names also are given according to their use (yard broom, home broom, threshing-floor broom, etc.) 1619202146.

Some plants are used for making crude shrubby brooms, e.g. species of the Ericaceae, Betulaceae, Fabaceae etc. families, for cleaning streets and yards (including village square, farmyard, stack-yard and threshing yard, sheds, roads, all open areas, etc.).

Soft brooms from shrubs or herbs (Asteraceae, Lamiaceae, Poaceae, Liliaceae, Apiaceae, etc.) are used to clean several places inside the house as threshing floor, cellar, kitchen, oven, fire place, to clean pots, etc.)

Particular brooms were made of sticky plant parts: e.g. in Sardinia of Stachys glutinosa 22 or of repellent and sticky materials: e.g. in Basilicata of Dittrichia viscosa to remove fleas 26. In order to eliminate thorns from Opuntia ficus-indica fruits were used Vitis vinifera shoots and Dittrichia viscosa leafy branches 22.

Ruscus aculeatus branches are commonly used for cleaning chimneys and walls from cobwebs 22.

Cleaning with brooms made from aromatic plants take the "burned food" odour away from ovens and stove burners, while oven and burners are still hot. In the research area are established 28 species used for special in ovens and fire places (all of them from Italy) – 9 of them are aromatic plants (Apium graveolens, Foeniculum vulgare, Ferula communis, Nicotiana glauca, Laurus nobilis, Myrtus communis, Pistacia lentiscus, Ballota nigra and Marrubium vulgare) as well some toxic plants as Conium maculatum and Daphne gnidium. For Ferula communis, Malva sylvestris and Nicotiana glauca is mentioned special use in ovens for bread 2226. For the other studied countries such data was not found.

Many broom species are widely used as ornamental landscape plants (Calluna vulgaris, Erica arborea, Spiraea media, Spiraea salicifolia, Cytisus scoparius, Laurus nobilis etc.) as well as for wasteland reclamation and sand dune stabilizing. Others are popular in horticulture and many of them are cultivated hybrids like Kew broom (Cytisus × kewensis) and Warminster broom (Cytisus × praecox).

Some "common broom" species, introduced as ornamental plants or cultivated for broom-manufacturing, became naturalized and invasive weeds because of their aggressive dispersal seed.

Cleaning with a broom of some plant species is part of many folklore traditions and religious rituals. Brooms of Centaurea spp. are used at home and are objects of beliefs; they have a special place in the home 202127284649. The plants are collect in special day of the summer named in Bulgarian traditions "Enyovden" (24 June). The made by them brooms, are guarded in the house until the next year. This broom is kept to the fire-side or behind the door, to protect the family and the family from illnesses and evils. Through the spring the older broom sets on fire and throws on the waste. The fleas, the snakes and the lizards from the house are chased so away. A broom is not to be jumped, it is sin. If a girl is beaten with a broom, she will not marry. A broom if a little child is being left gone merely in a room is put next to it to defend it against an evil spirits. The broom is used for human treatment by fear. Through the spring customs a broom from the fire-side is stolen. The more the hostess is anger, that more rains there are. Later, the same broom draped in rags, and the stick is formed as the head with the eyes, eyebrows and a mouth. The name of this human's figure is "German". But this one "German" is used in rituals for drought, against rain 49.

A Basil (Ocimum basilicum) broom plays a special role in folklore tales and songs 212849. In Italy (and other several European countries) people believed that a broom made with Sorghum bicolor or with other plants, put behind the door of the house, could take away the witches (witches, counting the stem, made mistakes; they were occupied along the entire night counting the stems, therefore they do not could entry in the house 212728.