Blackstonia perfoliata Yellow-wort (Gentianaceae) Erect annual with basal leaf rosette/ stem leaves joint at the base/flowers 8-15 mm/wet places/Jan-Sep
Buxus balearica Balearic Box (Buxaceae) Evergreen shrub/leaves ovate-elliptical/flower groups up to 10 mm/4 stamens/mountain forests-rocky coasts/Jan-Feb
Carpobrotus edulis Hottentot Fig (Aizoaceae) Procumbent plant with succulent leaves/ leaves triangular in diameter/flowers 8-9 cm/many yellow stamens/Apr-Aug
Centaurium maritimum Yellow Centaury (Gentianaceae) Annual/leaves elliptical/flowers 11-25 mm/garigues-dry meadows/Apr-July
Cicendia filiformis Yellow Centaury (Gentianaceae) Annual with 1-3 stems/leaves linear/ flowers solitary/flowers with long stalks/flowers 3-7 mm/fields/Menorca/Apr-July
Euonymus europaeus Spindle (Celastraceae) Shrub/twigs 4-angled/leaves ovatelanceolate/flowers 8-10 mm/oak forests-hedgerows/Mar-May
Fumana thymifolia Thyme-leaved Fumana (Cistaceae) Dwarf shrub with stipules/leaves needle-like/flowers 9-14 mm/outer filaments of the stamens without anthers/rocky areas-garigues/Mar-June
Halimium halimifolium (Cistaceae) Hairy dwarf shrub without stipules/leaves elliptical/ flowers 2-3 cm/on sand/Apr-May
Helianthemum caput-felis* Cat’s-head Rockrose (Cistaceae) Small shrub with stipules/ leaves linear-lanceolate/flowers 16-22 mm/all stamens fertile/epicalyx oval + reflexed/ beaches/May-June
Helianthemum marifolium* (Cistaceae) Hairy dwarf shrub/leaves oval/lower side of leaves grey or white-wooly/flowers 10-15 mm/oak and pine forest-garigues-beaches/ Feb-July
Helianthemum nummularium Common Rockrose (Cistaceae) Dwarf shrub with stipules/ leaves oblong/lower side of leaves with grey hairs/flowers 12-20 mm/all stamens fertile/ epicalyx linear/Apr-May
Helianthemum origanifolium (Cistaceae) Hairy dwarf shrub/flowers 5-8mm/on sand/ Apr-May
Helianthemum salicifolium Willow-leaved Rockrose (Cistaceae) Annual with stipules/ hairy/leaves obovate/flowers 10-22 mm/Mar-June
Hypericum australe (Hypericaceae) Hairless plant/leaves lanceolate/petals 8-11mm/calyx with glands/Menorca
Hypericum balearicum* Balearic St. John’s-wort (Hypericaceae) Shrub/twigs 4-angled/ leaves ovate-oblong/leaf edge wavy/flowers 15-40 mm/oak forest-olive tree plantations/ Jan-Dec
Hypericum hircinum* Stinking Tutsan (Hypericaceae) Shrub/leaves narrowly lanceolate to oval/flowers 25-30 mm/wet places in the mountains/May-Sep
Hypericum perfoliatum (Hypericaceae) Annual/leaves lanceolate/flowers 16-26 mm/calyx with glands/fields-road sides/May-June
Hypericum perforatum Perforate St. John’s-wort (Hypericaceae) Annual/leaves oval to linear/flowers 2-3 cm/waste land/May-July
Hypericum tomentosum (Hypericaceae) Hairy annual/leaves ovate/flowers 10-22 mm/ wet places/Apr-Sep
Hypericum triquetrifolium Crisped St. John’s-wort (Hypericaceae) Annual with wavy leaves/leaves triangular-lanceolate/flowers 10-20 mm/garigues-fields-waste land/ Menorca/Mar-Oct
Lampranthus multiradiatus (Aizoaceae) Shrub with sessile leaves/leaves 3-angled/ flowers 24-30 mm/garden plant/Apr-May
Picris echioides Bristly Ox-tongue (Compositae) Hairy annual/multi-flowered/bracts hairy and in multiple rows/flowers up to 20-25 mm/waste land-road sides/May-Sep
Sagina apetala Annual Pearlwort (Caryophyllaceae) Annual/leaves acutely spined or tipped (magnifying glass)/flowers 2-4 mm/calcareous fields-walls-rocky soils/Apr-May
Sagina maritima Sea Pearlwort (Caryophyllaceae) Annual/leaves linear-lanceolate/ flowers 4-6 mm/dunes-calcareous fields-beaches/Apr-May
Vincetoxicum hirundinaria (Asclepiadaceae) Winding plant/leaves cordate-ovate/flowers 5-10 mm/in groups of 6-8/grassland/May-July
Narrow-leaved Mock Privet Phillyrea angustifolia (Oleaceae)
| Flowers small | |
| 1A-Aquatic plant | |
| 2A-With floating leaves | Potamogeton natans |
| 2B-Only with submerged leaves | Potamogeton pusillus |
| 1B-Shrub | |
| 2A-Leaves flat and stalked | Halimione portulacoides |
| 2B-Leaves scale-like/stem fleshy | |
| 3A-Seeds black | Arthrocnemum macrostachyum |
| 3B-Seeds grey or brown | |
| 4A-With stems below ground | Sarcocornia perennis (16) |
| 4B-Without stems below ground | Sarcocornia fruticosa |
| 1C-Herb | |
| 2A-Leaves fleshy | Salicornia ramosissima |
| 2B-Leaves different | |
| 3A-Leaves stalked | Spinacia oleraceae |
| 3B-Leaves sessile | Herniaria hirsuta |
Arthrocnemum macrostachyum (Chenopodiaceae) Shrub/leaves succulent + in scales/ flowers small/rocky coastlines-marshland/Apr-Sep
Halimione portulacoides Sea Purslane (Chenopodiaceae) Small silvery shrub/lower leaves cordate/rocky coastlines-marshland/July-Oct
Herniaria hirsuta Hairy Rupture-wort (Caryophyllaceae) Hairy annual/leaves elliptical/ flower 1-2 mm/calyx densely hairy/2-5 stamens/dry places/Apr-June
Potamogeton natans Broad-leaved Pondweed (Potamogetonaceae) Aquatic plant with leaves on the water surface
Potamogeton pusillus Lesser Pondweed (Potamogetonaceae) Aquatic plant without leaves on the water surface
Salicornia ramosissima Wood Glasswort (Chenopodiaceae) Dwarf shrub/leaves succulent flowers small + with yellow stamens/marshland/Aug-Oct
Sarcocornia fruticosa (Chenopodiaceae) Dwarf shrub/stem whitish/leaves succulent/ rocky coastlines-marshland/June-Sep
Sarcocornia perennis Shrubby Glasswort (Chenopodiaceae) Mat forming dwarf shrub/ leaves succulent/marshland/June-Sep
Spinacia oleraceae Spinach (Chenopodiaceae) Annual/calyx with 4-5 parts/4-5 stamens/ crop plant
| 2-4 petals | |
| 1A-Aquatic plant | |
| 2A-With floating leaves | Potamogeton natans |
| 2B-Only with submerged leaves | Potamogeton pusillus |
| 1B-Land plant | |
| 2A-Leaves not fleshy | |
| 3A-Stem not woody | Salicornia ramosissima |
| 3B-Stem woody | |
| 4A-With stems below ground | Sarcocornia perennis (16) |
| 4B-Without
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