Euploca pottii J.I.M.Melo & Semir

First published in Kew Bull. 64: 286 (2009)
This species is accepted
The native range of this species is Brazil (Mato Grosso do Sul). It is a subshrub and grows primarily in the seasonally dry tropical biome.


Miranda de Melo, J.I. & Semir, J. 2009. Two new Brazilian species and new combinations in Euploca (Heliotropiaceae). Kew Bulletin 64: 285. DOI:

Brazil, Mato Grosso do Sul, Corumbá, Pott et al. 1397 (holotypus CPAP; isotypiCTES!, UEC!).
Morphology General Habit
Prostrate herb
Morphology Branches
Branches cylindrical or angulose only in the upper middle region, scabrous with whitish hairs, generally adpressed
Morphology Leaves
Leaves alternate, petiolate; petiole 1 – 4 mm, furrowed, strigose; blade 0.7 – 2.3 × 0.2 – 0.6 cm, subchartaceous, apex acute, base cuneate, margin entire, ciliate, strigose on both surfaces; venation hyphodromous, with a prominent vein in the upper surface
Morphology Reproductive morphology Inflorescences
Inflorescence 6.6 cm long, terminal, lax, many-flowered; peduncle 1 cm long, strigose; bracts 0.7 – 1 × 0.3 – 0.4 cm, leafy, largely elliptic, apex acute, pubescent on both surfaces, subsessile
Morphology Reproductive morphology Flowers
Flowers 4 – 7.8 mm long, subsessile; calyx 2.8 – 4.3 × 0.6 – 0.8 mm, lobes with three length classes, the major 4.2 × 0.8 mm, the intermediate 4 × 0.6 mm, the minor 2.7 × 0.6 mm, elliptic, externally strigose, brownish hairs located only at the base, alternate for blackish punctuations; venation hyphodromous; corolla 4 – 7.5 mm long, tubular, white, tube 3 – 5 mm, sericeous externally, with villous ring internally at the constriction, lobes 1 – 2 × 0.5 – 0.8 mm, elliptic. Subsessile stamens, filaments inserted c. 0.5 mm above the base of the tube; anthers c. 1 mm long, ovate, cordate at the base, longly apiculate
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary c. 0.5 mm long, subglobose; stigma c. 0.5 mm long, sessile, 4-horned, inferior middle portion blackish, upper middle portion whitish
Morphology Reproductive morphology Fruits
Fruit not seen.
Brazil: Mato Grosso do Sul State.
Euplocapottii is only known from the municipality of Corumbá, Mato Grosso do Sul State, in Brazil Central. Flowering in September.
Provisional IUCN Red List Category: Data Deficient (DD). Euplocapottii probably has been collected only once from the type locality, in 1994.
The specific epithet honours Dr Arnildo Pott, botanist of the Centro de PesquisaAgropecuária do Pantanal (CPAP) in the municipality of Corumbá, Mato Grosso do Sul State, western Brazil, and the collector of the type. Euplocapottii is morphologically similar to E. polyphylla (geographically isolated), sharing especially the terminal, lax, many-flowered inflorescences with leafy bracts. The species are separated based on the following characters: bract length and shape (c. 1 cm, largely elliptic in E. pottii vs c. 4 mm, ovate in E. polyphylla), corolla length (reaching 7.5 mm in E. pottii vs 6.5 mm in E. polyphylla), length and shape of corolla lacyniae (c. 2 mm, slightly ungulate in E. pottii vs 2.5 – 3 mm, ovate-deltoid in E. polyphylla), anther base (cordate in E. pottii vs truncate in E. polyphylla), but especially for the stigma (sessile in E. pottii vs style conspicuous in E. polyphylla). The two species also show disjunct geographical distributions: E. polyphylla occurs in the east zone, from Pará to Rio de Janeiro states while E. pottii shows a restricted distribution, being known at present only from Mato Grosso do Sul State.


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