John Hill

Centaurium (centaury) is a genus of 20 species in the gentian family (Gentianaceae), tribe Chironieae, subtribe Chironiinae. The genus was named after the centaur Chiron, famed in Greek mythology for his skill in medicinal herbs. It is distributed across Europe and Asia. Until 2004, Centaurium was given a much wider circumscription, comprising about 50 species ranging across Europe, Asia, the Americas, Australasia, and the Pacific. However this circumscription was polyphyletic, so in 2004 the genus was split into four, being Centaurium sensu stricto, Zeltnera, Gyrandra, and Schenkia.

Sonchus asper, the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow thistle, or spiny-leaved sow thistle, is a widespread flowering plant in the tribe Cichorieae within the family Asteraceae.

Crocus vernus (spring crocus, giant crocus) is a species of flowering plant in the family Iridaceae, native to the Alps, the Pyrenees, and the Balkans. Its cultivars and those of Crocus flavus (Dutch crocus) are used as ornamental plants. The Dutch crocuses are larger than the other cultivated crocus species (e.g., Crocus chrysanthus). Depending on the year, Crocus vernus starts flowering about the same time or up to 2 weeks after Crocus chrysanthus (snow crocus) starts flowering. Height: 4–6 inches (10–15 cm).

Petroselinum is a genus of two parsley species of flowering plants in the family Apiaceae, native to western and southern Europe and northern Africa. Plants of this genus are bright green, hairless, biennial and herbaceous; they are rarely annual plants. In the first year, they form a rosette of pinnate to tripinnate leaves and a tap root used as a food store over the winter. In the second year they grow a flowering stem up to 1 m tall with sparser leaves and umbels of white or pinkish to yellowish-green flowers.

Myosotis arvensis or field forget-me-not is a herbaceous annual to short lived perennial flowering plant in the family Boraginaceae. It is native to Europe, Turkey, the Caucasus, Siberia, the western Himalayas, and northwestern Africa. The plant is annual to perennial, erect, to 40 centimetres (16 in) and patent-hairy (hairs more-or-less at right-angles to the stem). The flowers are grey-blue, 3–5 millimetres (1⁄8–13⁄64 in) across, saucer shaped in profile, the sepal tube with hooked hairs. The mature fruits are dark brown, shiny nutlets. In the British Isles the plant is an archaeophyte,

Primula elatior, the oxlip (or true oxlip), is a species of flowering plant in the family Primulaceae, native to nutrient-poor and calcium-rich damp woods and meadows throughout Europe, with northern borders in Denmark and southern parts of Sweden, eastwards to the Altai Mountains and on the Kola Peninsula in Russia, and westwards in the British Isles.

Oxyria digyna (mountain sorrel, wood sorrel, Alpine sorrel or Alpine mountain-sorrel) is a species of flowering plant in the buckwheat family (Polygonaceae). It is native to arctic regions and mountainous parts of the Northern Hemisphere.

Cymbalaria is a genus of about 10 species of herbaceous perennial plants previously placed in the family Scrophulariaceae, but recently shown by genetic research to be in the much enlarged family Plantaginaceae. The genus is native to southern Europe. It is closely related to the genera Linaria and Antirrhinum, differing in having creeping growth and flowers borne singly rather than in dense erect spikes. The common name toadflax is shared with Linaria and other related genera. The scientific name means "resembling a cymbal" for the somewhat rounded leaves. By far the best known species is

Pilosella is a genus of flowering plants in the family Asteraceae. It includes approximately 250 species native to temperate Eurasia and northwestern Africa. Some sources include it within the genus Hieracium.

Cirsium heterophyllum, the melancholy thistle, is an erect spineless herbaceous perennial flowering plant in the family Asteraceae. It is native to Europe and western Asia, where it grows in upland meadows, grasslands, road verges and open woodland.

Oxyria is a genus of flowering plants in the family Polygonaceae with three accepted species. It has a circumboreal distribution in the northern hemisphere.

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Argentina (silverweeds) is a genus of plants in the rose family (Rosaceae) which is accepted by some authors, as containing 64 species, but classified in Potentilla sect. Leptostylae by others.

Conocephalum is a genus of complex thalloid liverworts in the order Marchantiales and is the only extant genus in the family Conocephalaceae. Some species of Conocephalum are assigned to the Conocephalum conicum complex, which includes several cryptic species. Conocephalum species are large liverworts with distinct patterns on the upper thallus, giving the appearance of snakeskin. The species Conocephalum conicum is named for its cone-shaped reproductive structures, called archegoniophores. Common names include snakeskin liverwort, great scented liverwort and cat-tongue liverwort. Species of

Cirsium dissectum, also known as meadow thistle, is an erect perennial herb. It is found in Great Britain, Ireland, France, the Netherlands, Germany, Italy, Spain, Hungary, Norway, etc. It is found in fens and less acidic peat bogs i.e. it prefers damp boggy areas.

Radiola linoides is the sole species in the Radiola genus, a monotypic genus of flowering plants belonging to the family Linaceae. It has the common names of 'allseed' and 'flaxseed'. It has a very short stem which is repeatedly subdivided, with a pair of very small leaves and a single white flower at each fork and at the end of the branches. It has leaves which are opposite arranged, oval (in shape) and sessile.

Psora is a genus of lichen-forming fungi in the family Psoraceae. Members of the genus are commonly called fishscale lichens. Lichens in the genus Psora generally have a squamulose thallus and anthraquinones in the hymenium. Photobiont partners of Psora lichens include members of the green algal genera Asterochloris, Chloroidium, Myrmecia, and Trebouxia.

Oenothera laciniata is a species of flowering plant in the evening primrose family known by the common name cutleaf evening primrose. It is native to the eastern United States but it can be found in many other places as an introduced species and sometimes a noxious weed. It has been reported in Hawaii, Australia, Britain, France, Korea, Japan, and other areas.

Scutellaria ovata, commonly known as the heartleaf skullcap, is a member of the mint family (Lamiaceae). Its range in the United States is from Minnesota to Florida, and from Texas to the Atlantic coast. It is also native to Mexico.

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Cirsium helenioides, the melancholy thistle, is an Asian and Arctic species of plants in the tribe Cardueae within the family Asteraceae. The species is native to Greenland (but considered extinct from Greenland since 1960), Iceland, Norway, Sweden, Finland, Russia, Xinjiang and Kazakhstan. Cirsium helenioides is a perennial plant herb up to 120 cm (48 inches) tall, usually not branched, blooming only once before dying. Leaves are green on top, woolly underneath, with thin spines along the edges. There is one flower head per plant, with purple (occasionally white) disc florets but no ray

Staphisagria is a genus in the family Ranunculaceae native to the Mediterranean. It used to be a subgenus or section in the genus Delphinium, but molecular evidence suggests it should be a genus.

Phonus is a genus of flowering plants in the family Asteraceae. It includes four species native to the Mediterranean basin, Macaronesia, western and Central Asia, the Caucasus, Ukraine, and southern European Russia.

Circaea canadensis, known as eastern enchanter's nightshade, Canada enchanter's nightshade, broad-leaved enchanter's nightshade, is a perennial herbaceous plant found in forests of eastern North America. It is very similar to its sister species, Circaea lutetiana, and was formerly considered conspecific (part of the same species).

Cirsium altissimum is a North American species of plants in the tribe Cardueae within the family Asteraceae. Common names are tall thistle or roadside thistle. The species is native to the eastern and Central United States.

Crocodilium is a genus of flowering plants belonging to the family Asteraceae. Its native range is Eastern Mediterranean. Species: Crocodilium creticum (Boiss. & Heldr.) N.Garcia & Susanna Crocodilium crocodylium (L.) Hill

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Monotropa is a genus of five species of herbaceous perennial flowering plants. The genus was formerly classified in the family Monotropaceae and presently classified in Ericaceae. They are native to temperate regions of the Northern Hemisphere and are generally rare. Unlike most plants, they do not have chlorophyll and therefore are non-photosynthetic; they are myco-heterotrophs that obtain food through parasitism on subterranean fungi. Because they do not need any sunlight to live, they can live in very dark sites such as the floor of deep forest. The name "Monotropa" is Greek for "one turn"

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