Thymus richardii* (Lamiaceae) Dwarf shrub/flower 7-9 mm/calyx with 10-13 veins/rock crevices-shady slopes/Ibiza/June-July
Vaccaria hispanica Cow Basil (Caryophyllaceae) Annual/leaves oblong-lanceolate to ovate-lanceolate/flowers 8-16 mm/calyx with 5 wings/2 styles or stigmas/fields-road sides/Feb-July
Grey-leaved Cistus Cistus albidus (Cistaceae)
| Flowers small | |
| 1A-Aquatic plant | Elatine hydropiper |
| 1B-Land plant | |
| 2A-Leaves fleshy | Lythrum portula |
| 2B-Leaves not so | Elatine macropoda |
| 2-4 petals | |
| 1A-Leaves with stalks | Elatine hydropiper |
| 5 petals | |
| 1A-Leaves with stalks | |
| 2A-Herb/flowers 25-35mm | Mirabilis jalapa |
| 2B-Plants woody below/flowers 6-8 mm | Vincetoxicum nigrum |
| 2C-Shrub/flowers 40-60 mm | Cistus creticus |
| 1B-Leaves sessile | |
| 2A-Petals of the flower fused | |
| 3A-Stem 4-angled/flowers 4-7 mm | Anagallis arvensis (9) |
| 3B-Stem round/flowers 12-14 mm | |
| 4A-Flowers solitary | Centaurium spicatum |
| 4B-Flowers in groups/Apr-May | Centaurium tenuiflorum |
| 2B-Petals of the flower separated | |
| 3A-Sepals fused | |
| 4A-Petal margin toothed | Dianthus rupicola* |
| 4B-Petal margin entire | |
| 5A-Plants woody below | Silene hifacensis* |
| 5B-Plants not woody below | |
| 6A-Sepals > petals | Agrostemma githago (p. 46) |
| 6B-Calyx < 11 mm | Silene rubella |
| 6C-Calyx 10-25 mm | Silene cambessedesii* |
| 3B-Sepals not so | |
| 4A-Herb | |
| 5A-Plants woody below | Spergularia fimbriata |
| 5B-Plants not woody below | |
| 6A-Inflorescence without bracts | Spergularia diandra |
| 6B-Inflorescence with bracts | |
| 7A-Seeds black | Spergularia heldreichii |
| 7B-Seeds brown | Spergularia rubra |
| 4B-Shrub | |
| 5A-Plants with hairs/flowers 4-6 cm | Cistus albidus (p. 30) |
| 5B-Plants without hairs/flowers small | Coriaria myrtifolia |
Agrostemma githago Corn Cockle (Caryophyllaceae) Grey hairy annual/leaves linearlanceolate/flowers 3-5 cm/5 styles/fields-road sides/May
Anagallis arvensis Scarlet Pimpernel (Primulaceae) Annual/stem 4-angled/leaves obovate/flowers 4-7 mm/5 stamens/fields-road sides/Apr-May
Centaurium spicatum Spiked Centaury (Gentianaceae) Annual/leaves ovate below, elliptical above/flowers 12-14 mm/June-Oct
Centaurium tenuiflorum Slender Centaury (Gentianaceae) Annual/leaves broadly ovate below, elliptical-oblong above/flower 12-14 mm/fields-marshland-beaches/Apr-May
Cistus albidus Grey-leaved Cistus (Cistaceae) Greyhwhite hairy shrub/leaves ovate to elliptical/flowers 4-6 cm/flower stalk 5-20 mm/many stamens/garigues-pine forest/Apr-June
Cistus creticus (Cistaceae) Shrub/hairy/leaves ovate-lanceolate/flowers 4-6 cm/gariguespine forest-beaches/Apr-June
Coriaria myrtifolia Mediterranean Coriaria (Coriariaceae) Shrub/stem 4-angled leaves acutely lanceolate to egg-shaped/flowers 2-5 cm/marshland/Apr-July
Dianthus rupicola* (Caryophyllaceae) Shrub/leaves 3-5 mm wide/petal margin toothed/ petals 10-15 mm/rock crevices/July-Sep
Elatine hydropiper Eight-stamened Waterwort (Elatinaceae) Aquatic plant/leaves elliptical/8 stamens/marshland/Menorca
Elatine macropoda (Elatinaceae) Annual/flowers stalked/4 sepals and petals/8 stamens/ marshland/May-July
Lythrum portula Water Purslane (Lythraceae) Annual/leaves obovate/flowers 1-2 mm/ Menorca
Mirabilis jalapa (Nyctaginaceae) Annual/leaves acutely-ovate/flowers 25-35mm with 5 stamens/fields-marshland-road sides-garden plant/July-Oct
Silene cambessedesii* (Caryophyllaceae) Annual with glandular hairs/calyx 10-25 mm/ calyx with veins/rocky coastlines-beaches/Mar-June
Silene hifacensis* (Caryophyllaceae) Woody below/hairy/petal edge roled in/calyx 17-21 mm/calyx with veins/rock crevices/Ibiza
Silene rubella (Caryophyllaceae) Hairy annual/calyx < 11 mm/calyx with veins fieldsroad sides/May-June
Spergularia diandra (Caryophyllaceae) Annual/leaves with triangular stipules/flowers 3-5 mm/2-3 stamens/rocky coastlines/Apr-June
Spergularia fimbriata (Caryophyllaceae) Plant woody below/leaves with stipules/petals 4-6 mm/10 stamens/Ibiza
Spergularia heldreichii (Caryophyllaceae) Annual with stipules/inflorescence with (2)6-8(10) stamens/seeds black/capsule 2-3 mm
Spergularia rubra (Caryophyllaceae) Sticky annual/leaves linear with stipules/petals 3-4 mm/stamens 5-10/seeds brown/fields-marshland-beaches-road sides/Apr-May
Vincetoxicum nigrum Dark Swallow-wort (Asclepiadaceae) Leaves broadly ovatelanceolate/flowers 6-8 mm/stamens fused/rock crevices/May-Aug
| More than 5 petals | |
| 1A-Leaves with stalks | |
| 2A-Flowers 1-2 mm | Lythrum borysthenicum |
| 2B-Flowers > 10 mm | Aptenia cordifolia |
| 1B-Leaves sessile | |
| 2A-Plants with hairs | Drosanthemum hispidum |
| 2B-Plants without hairs | |
| 3A-Flowers up to 2 mm big | Lythrum portula |
| 3B-Flowers > 10 mm | |
| 4A-Flowers with 4-5 styles | Lampranthus multiradiatus (19) |
| 4B-Flowers with 8-20 styles | |
| 5A-Stamens of the flower white | Disphyma crassifolia |
| 5B-Stamens of the flower red | Carpobrotus chilensis |
| 5C-Stamens of the flower yellow | |
| 6A-Flowers 8-9 cm | Carpobrotus edulis (10) |
| 6B-Flowers > 10 cm | Carpobrotus acinaciformis |
| Flowers irregular | |
| 1A-Herb without hairs | Centranthus ruber (11) |
| 1B-Hairy dwarf shrub | |
| 2A-Upper lip of the flower divided | Coridothymus capitatus |
| 2B-Upper and lower lip of the flower lobed | Micromeria graeca |
Aptenia cordifolia (Aizoaceae) Plant with flat leaves/leaves cordate-ovate and with delicate hairs/flowers 2 cm/flowers with 4 stigmas/fields-road sides/Apr-Nov
Carpobrotus acinaciformis Red Hottentot Fig (Aizoaceae) Hairless plant/flower 11-12 cm many yellow stamens/leaves succulent