Ethnobotanical Study of Indigenous Medicinal Plants of Jazan Region, Saudi Arabia

Table 4

Relative importance (RI) values for MPs used against specific ailments in Jazan region. RI=NP+NCS where NP is obtained by dividing the number of properties (reported specific ailments) attributed to a species divided by the total number of properties attributed to the most versatile species (species with the highest number of properties). NCS is the number of body systems (ailment categories) treated by a given species divided by the total number of body systems treated by the most versatile species.

Plant species	NSC	NSC	RI
Ziziphus spina-christi, Calotropis procera	18/18	12/12	2.00
Datura stramonium	17/18	11/12	1.86
Withania somnifera, Aloe vera	16/18	11/12	1.81
Aerva javanica	13/18	12/12	1.72
Citrullus colocynthis.	13/18	11/12	1.64
Blepharis ciliaris	18/18	7/12	1.58
Tribulus terrestris	12/18	11/12	1.58
Abutilon Pannosum, Ricinus communis	16/18	7/12	1.47
Adenium obesum, Acalypha fruticosa	14/18	7/12	1.36
Senna alexandrina	11/18	9/12	1.36
Ocimum basilicum	14/18	7/12	1.36
Tamarindus indica.	13/18	7/12	1.31
Moringa peregrina	11/18	8/12	1.28
Tamarix aphylla	14/18	6/12	1.28
Capparis spinosa, Solanum incanum, Achyranthes aspera	13/18	6/12	1.22
Artemisia abyssinica	11/18	7/12	1.19
Olea europaea	14/18	5/12	1.19
Capparis decidua	12/18	6/12	1.17
Ruta chalepensis	10/18	7/12	1.14
Commiphora gileadensis, Myrtus communis	9/18	7/12	1.08
Fumaria parviflora, Rumex nervosus, Zygophyllum coccineum	10/18	6/12	1.06
Trachyspermum ammi	11/18	5/12	1.03
Anisotes trisulcus	7/18	7/12	0.97
Commiphora myrrha, Malva parviflora, Balanites aegyptiaca	8/18	6/12	0.94
Leptadenia pyrotechnica, Cleome viscosa, Alhagi graecorum	9/18	5/12	0.92
Marrubium vulgare	10/18	4/12	0.89
Achillea biebersteinii, Euphorbia schimperiana	8/18	5/12	0.86
Salvadora persica	5/18	7/12	0.86
Dracaena ombet	9/18	4/12	0.83
Rhanterium epapposum, Lawsonia inermis, Rumex vesicarius	7/18	5/12	0.81
Caralluma acutangula	8/18	4/12	0.78
Cissus quadrangularis, Foeniculum vulgare, Cleome gynandra, Urtica pilulifera	6/18	5/12	0.75
Dactyloctenium aegyptium	9/18	3/12	0.75
Nerium oleander, Cadaba farinosa	7/18	4/12	0.72
Conyza incana, Juniperus procera, Grewia tenax, Plantago major, Tephrosia apollinea	6/18	4/12	0.67
Rhazya stricta, Jatropha glauca, Amaranthus viridis, Acacia oerfota, Ficus carica	5/18	4/12	0.61
Cleome brachycarpa, Coffea arabica, Clematis wightiana, Euphorbia retusa, Jasminum sambac	6/18	3/12	0.58
Teucrium yemense, Peganum harmala, Zygophyllum album	4/18	4/12	0.56
Avicennia marina, Sansevieria ehrenbergii, Asparagus africanus, Cleome amblyocarpa Acacia seyal, Hyoscyamus muticus, Plectranthus asirensis, Origanum majorana, Dodonaea viscosa	5/18	3/12	0.53
Asphodelus tenuifolius, Fagonia bruguieri	6/18	2/12	0.50
Pulicaria jaubertii, Azadirachta indica, Combretum molle	4/18	3/12	0.47
Sonchus oleraceus	5/18	2/12	0.44
Carissa edulis, Saccharum spontaneum, Pulicaria undulata, Cuminum cyminum, Monolluma quadrangular, Heliotropium bacciferum, Ficus palmata	3/18	3/12	0.42
Acalypha indica, Lavandula dentate, Astragalus spinosus	4/18	2/12	0.39
Aerva lanata, Xanthium strumarium., Picris cyanocarpa, Heliotropium digynum, Tamarix nilotica, Acacia tortillis, Emex spinosa	3/18	2/12	0.33
Suaeda aegyptiaca	4/18	1/12	0.31
Anethum graveolens, Zygophyllum simplex, Chrysanthemum coronarium, Cadaba rotundifolia, Minuartia filifolia, Acacia ehrenbergiana, Nepeta deflersiana, Dorstenia foetida, Rhizophora mucronata	2/18	2/12	0.28
Pulicaria schimperi, Chrozophora oblongifolia, Artemisia sieberi, Osteospermum vaillantii	2/18	1/12	0.19
Peristrophe paniculata, Ceropegia variegate, Matthiola Arabica, Opuntia ficus-indica, Eucalyptus camaldulensis, Limonium axillare	1/18	1/12	0.14