Blackstonia perfoliata

Blackstonia perfoliata or yellow-wort is a species of flowering plant in the family Gentianaceae found around the Mediterranean Basin, but extending into northwestern Europe.

Blackstonia perfoliata
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Gentianaceae
Genus: Blackstonia
Species:
B. perfoliata
Binomial name
Blackstonia perfoliata
Synonyms

Chlora perfoliata[1]

Description

Yellow-wort grows from ten to fifty centimetres (four to twenty inches), tall with stiff, branching stems. The leaves are glaucous, opposite and entire, the upper ones perfoliate, being united at the base. It bears terminal cymes of bright yellow, stalked flowers, 1–1.5 cm across. The calyx is deeply divided into 6–10 linear lobes or sepals, spirally arranged, free or nearly free from each other at the base and shorter than the corolla. The petals number six to ten and form a short tube. There are six to ten adherent stamens and a two-lobed stigma.[2]

Ecology

This species is found in chalk or limestone turf and on dunes. It flowers from June to October in Britain where it is widespread but not common.[2] Pathogens affecting B. perfoliata include Peronospora chlorae.[3]

Yellow-wort
Capsules and seeds – MHNT
gollark: Yeeees, it seems like the particularly totalitarian stuff just gets shoved through without COVID-19 being hugely related.
gollark: But that seems inaccurate because politicians also probably look good/bad if they do well/badly against COVID-19 regardless.
gollark: If you were somewhat more cynical than me I guess you could think something like: updated vaccines aren't part of mainstream political discourse yet, they are unlikely to be unless there is deployment/development of them, and so politicians (who are optimizing for looking good according to said political discourse) don't care and don't do anything about the situation.
gollark: I said three things. Maybe I should retroactively use semicolons.
gollark: So I guess either the entire system is missing obvious low-hanging fruit, the possible benefits of updated vaccines are known but not enough to make people actually budge, or the decision-making people think that updated vaccines wouldn't be significantly better.

References
  1. "Blackstonia perfoliata – (L.)Huds". Plants for a future.
  2. McClintock D. and Fitter, R. The Pocket Guide to Wildflowers. Collins (1956)
  3. Hall, G., "Peronospora chlorae", IMI Descriptions of Fungi and Bacteria


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