Eurystyles uxoris Bogarín, 2020

Bogarín, D., 2020, A new species of Eurystyles (Orchidaceae: Spiranthinae) from Costa Rica, Blumea 65 (1), pp. 65-68 : 66-67

publication ID

https://doi.org/10.3767/blumea.2020.65.01.07

persistent identifier

https://treatment.plazi.org/id/767487FF-FFAF-C064-DC24-FE871C37FCF4

treatment provided by

Felipe

scientific name

Eurystyles uxoris Bogarín
status

sp. nov.

Eurystyles uxoris Bogarín View in CoL , sp. nov. — Fig. 1d View Fig , 2 View Fig , 3d View Fig ; Map 1 View Map 1

The species is similar to Eurystyles auriculata Schltr. and E. standleyi Ames , it differs by the smaller plants to 3 cm tall, smaller leaves less than 1.6 cm long, flowers with a brown dorsal sepal and brown lip apex, callose petals and a pandurate lip.

Type. D. Bogarín 10300 & M. Bonilla (holo JBL-spirit), Costa Rica, Limón, Pococí, Guápiles , Bellavista , c. 3.8 km south of the school of La Guaria de Bellavista , banks of a tributary of the Río Blanquito , tropical wet forest, epiphytic in secondary forest, 746 m, 8 June 2013 .

Etymology. From the Latin uxorius, ‘of the wife’, in honour to my wife Maricruz Bonilla for supporting my studies on orchids and her loyal company in our journeys in search of plants.

Epiphytic, caespitose, bromeliad-like, small, less than 3 cm tall. Roots fleshy, fusiform, fasciculate, 1.8 mm diam. Stem erect, much abbreviated. Leaves 8 or 9, rosulate at the base of the stem, evergreen, subpetiolate; blade elliptic or oblanceolate, 0.9–1.6 by 0.3–0.5 cm, apex acute, margin ciliate, light green, adaxially glossy. Inflorescences racemose, densely congested, appearing capitate, to 7.5 cm long, pendent, pubescent. Cauline leaves up to 2, with ciliate margins. Rachis c. 0.7 cm long, 5–10- or more-flowered, congested, dense. Floral bracts broadly ovate, 9–19 mm long, apex acute to acuminate, conduplicate, lacerate, green, brownish at apex. Flowers small, erect, tubular, the dorsal sepal brown, the lateral sepals white, the petals white, the lip white with a brown-greenish apex, non-resupinate. Ovary 3–5 mm long, cylindrical, untwisted, sessile, glabrous. Dorsal sepal obovate to oblong, c. 3.5 by 1.2 mm, apex obtuse, conduplicate, concave above the base, 1-nerved, adaxially ciliate along the midvein. Lateral sepals oblong, c. 5.5 by 1.7 mm, apex subacute, conduplicate, concave above the base, 1-nerved, denticulate, adaxially pubescent. Petals oblanceolate, c. 3.5 by 1.3 mm, apex thickened, obtuse, conduplicate. Lip clawed; claw c. 1.2 mm long, concave, adnate to the sepaline tube; the lamina pandurate, c. 4.6 by 3.2 mm, constricted in the middle, with conspicuous, basal, thickened auricles, the apex papillose, obtuse. Column cylindric, 2.6–2.8 mm long, abaxially pubescent, truncate. Pollinia 4, in pairs, oblong, viscidium rounded. Anther cap ovate, cucullate.

Distribution — Known only from the type locality on the Caribbean slopes of Cordillera Volcánica Central, Costa Rica.

Habitat & Ecology — Epiphytic on small mossy branches of trees along a roadside in secondary forest. Other orchids growing sympatrically were: Benzingia reichenbachiana (Schltr.) Dressler , Diodonopsis pygmaea (Kraenzl.) Pridgeon & M.W.Chase , Epidendrum mora-retanae Hágsater , Gongora leucochila Lem. , Pleurothallis ruscifolia (Jacq.) R.Br. and Stelis spp.

Notes — The species is similar to E. auriculata and E. standleyi ( Fig. 3 View Fig ), however, it differs from both species by the smaller plants to 3 cm tall (vs> 5 cm), the smaller leaves of less than 1.6 cm long (vs> 4 cm), the brown dorsal sepal (vs white), the brown lip apex (vs white with a green stripe), petals callose or thickened at apex (vs ecallose), and the pandurate lip (oblong or obovate, constricted below the apex).

Dressler (2003) noticed a possibly different species based on a plant collected by C. H. Lankester ( Lankester 483, AMES) in Peralta, Turrialba in the Caribbean of Costa Rica. This specimen, treated by Dressler (2003) as ‘ Eurystyles sp. A’, differs in the wide hypochile tapering into a narrow isthmus below the wider epichile. Unfortunately, I could not study this specimen and further analysis may confirm it to be another collection of E. uxoris or a different species not yet described.

M

Botanische Staatssammlung München

C

University of Copenhagen

H

University of Helsinki

AMES

Harvard University - Oakes Ames Orchid Herbarium

I

"Alexandru Ioan Cuza" University

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