Eupatorium L.

Eupatorium semiamplexifolium G.S.S.Almeida & Carv.-Okano

This species is accepted, and its native range is Brazil (Minas Gerais).


de Almeida, G.S.S. & de Carvalho-Okano, R.M. 2010. Three new species of Eupatorieae (Compositae) from Brazil. Kew Bulletin 65: 255. DOI:

According to the evaluation of the presently available information, this species can be scored, using IUCN Categories and Criteria (IUCN 2001), as Critically Endangered (CR Blabi,ii, B2abi,ii), since its Area of Occurrence is less than 100 km², its Area of Occupancy is less than 10 km², and it has been found only in one location.
Brazil, Minas Gerais, only in the municipality of Ouro Preto and the Parque Estadual do Itacolomi.
In “campo rupestre” (rocky grasslands), in temporarily flooded area; 1500 m.
Morphology General Habit
Subshrub 1 m tall
Morphology Leaves
Leaves opposite, patent, sessile, semi-amplexicaul, blades oblanceolate, at times panduriform, 1.5 – 8 cm long, 0.4 – 2.6 cm wide, apex acuminate, base semi-auriculate, adaxial face hispid-glandulous, abaxial face tomentose, glandular-pointed, principal nerves prominent, vinaceous
Morphology Reproductive morphology Flowers Florets
Florets 25 – 30, perfect, vinaceous corolla, tubulose, 6 – 7 mm long, glabrous, lobes discreetly papillose at the apex; anthers with oblong apex, obtuse base, cylindrical anther collar, slightly flattened; styles with clavate branches, bulbiformstylepodium, papillose
Morphology Reproductive morphology Fruits
Cypselae prismatic, 4 – 5 mm long, 4-contate, densely glandulous with stalked trichomes, carpopodium conical, conspicuous; pappus 5 – 7 mm long, uniseriated, white and rough bristles
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, paniculiform with corymb of few capitula at the apex of divaricate branches
Morphology Reproductive morphology Inflorescences Bracts Involucre
Involucre campanulate, 8 – 9 mm long, involucral bracts 3-seriate; external bracts 2.5 – 3.5 × 1.5 – 2 mm, ovate, densely hispid-glandulous, vinaceous, intermediate bracts 5 – 6.5 × 1.5 – 2 mm, oblanceolate, puberulous-glandulous, internal bracts 6.5 – 7.5 × 1.5 – 2 mm, lanceolate, puberulous-glandulous to glabrescent, vinaceous, both with a pointed ciliate apex, margins ciliate, internally fringed; receptacle plane, epaleaceous, honeycombed, glabrous
Morphology Reproductive morphology Inflorescences Capitulum
Capitula discoid, shortly pedunculate; peduncles 0.2 – 0.6 mm long, densely glandular
Morphology Stem
Stem cylindrical, striate, vinaceous, densely hispid-glandulous with stalked glandular trichomes, brown
Eupatorium semiamplexifolium is characterised by semiamplexicaul leaves, a densely glandulous indumentum, with stalked glandular trichomes on the branches, leaves, bracts and cypselas; short-pedunculate capitula ordered in corymbs, pendulous, on the apex of divaricate branches, 3-seriate involucre with gradually larger bracts and flowers with papillose stylepodia. E. itacolumensis is the most closely related species, distinguished by the glabrous bracts, stalked capitula, 2-seriate involucre, with subequal bracts and flowers with glabrousstylepodia. E. semiamplexifolium belongs to sect. Heterolepis Baker series Subibricata DC. due to the presence of a involucre with 3 series of bracts, each gradually larger than the other. The specific epithet refers to the semiampliplexicaul foliar base.
Brazil, Minas Gerais, Ouro Preto, Parque Estadual do Itacolomi, 18 July 2007, G. S. S. Almeida et al. 765 (holotypusVIC!; isotypus HUNEB!).

Native to:

Brazil Southeast

Eupatorium semiamplexifolium G.S.S.Almeida & Carv.-Okano appears in other Kew resources:

First published in Kew Bull. 65: 256 (2010)

Accepted by

  • Roskov Y. & al. (eds.) (2018). Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

  • Kew Bulletin

    Kew Bulletin

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.