Ecological and Phytochemical Studies on Euphorbia retusa (Forssk.) from Egyptian Habitat

Table 3

A list of 30 species recorded in the study area. Species are represented with their relative density and frequency.

Species	Density					Frequency (%)
	Site 1	Site 2	Site 3	Site 4	Site 5
Perennials
Asphodelus aestivus Brot.	15	21	11	0	33	80
Astragalus trigonus DC.	0	0	0	7	0	20
Centaurea calcitrapa L.	5	8	0	0	0	40
Citrullus colocynthis (L.) Schrad.	0	0	0	0	6	20
Convolvulus althaeoides L.	0	0	0	17	0	20
Deverra tortuosa (Desf.) DC.	10	18	9	0	3	80
Dipcadi erythraeum Webb & Berthel.	0	0	2	0	0	20
Echinops spinosus L.	0	13	11	0	0	60
Echiochilon fruticosum Desf.	0	0	0	4	2	40
Euphorbia retusa Forssk.	11	5	12	19	24	100
Farsetia aegyptia Turra.	0	1	3	0	0	40
Haloxylon scoparium Pomel.	9	17	18	26	11	100
Haplophyllum tuberculatum (Forssk.) Juss.	0	0	0	5	0	20
Lycium europaeum L.	0	0	21	0	8	40
Lygeum spartum Loefl. ex L.	0	0	0	0	1	20
Marrubium vulgare L.	6	2	0	0	0	40
Peganum harmala L.	0	0	0	4	2	40
Plantago albicans L.	3	0	5	0	0	40
Salvia lanigera Poir.	0	2	0	5	0	20
Scorzonera undulata Vahl.	6	2	0	0	0	40
Thymelaea hirsuta (L.) Endl.	29	11	4	8	3	100
Zygophyllum album L.f.	6	0	4	4	7	80
Annuals
Cakile maritima Scop.	0	0	1	1	0	40
Carduus pycnocephalus L.	1	1	0	1	0	60
Cutandia memphitica (Spreng.) Benth.	0	0	0	0	1	20
Filago desertorum Pomel.	0	0	1	0	0	20
Heliotropium supinum L.	0	1	0	0	1	40
Ifloga spicata (Forssk.) Sch.Bip.	0	0	1	1	0	40
Lappula spinocarpos (Forssk.) Asch. ex Kuntze.	1	1	0	0	0	40
Medicago intertexta (L.) Mill.	1	1	1	1	1	100
Total no. of plants	13	15	15	15	14	—