Maguirellaria (Caryophyllaceae), a new genus from Dominican Republic Author Iamonico, Duilio 0000-0001-5491-7568 Department of Environmental Biology, University of Rome Sapienza, piazzale Aldo Moro 5, 00185 - Rome, Italy duilio. iamonico @ uniroma 1. it; https: // orcid. org / 0000 - 0001 - 5491 - 7568 text Phytotaxa 2023 2023-05-25 598 3 237 244 http://dx.doi.org/10.11646/phytotaxa.598.3.5 journal article 53395 10.11646/phytotaxa.598.3.5 6971963f-0f63-43f0-a46d-372285e08005 1179-3163 7969982 Maguirellaria minutifolia (Maguire) Iamonico , comb. nov. ≡ Stellaria minutifolia Maguire , Brittonia 10: 30. 1958 . Type (fig. 3):— DOMINICAN REPUBLIC . Prov. Benefactor, Saban Nueva , ne of Rio Arriba del Norte at 6200’ alt., edge of river in grassy area, 17 September 1946 , Howard & Howard 9019 [ holotype : NY00073722! (https://plants.jstor.org/stable/viewer/10.5555/ al.ap.specimen.ny00073722); isotypes: A00037996! (https://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.gh0003701 4?loggedin=true), BM000583340! (https://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.gh00037014?loggedin=true), NY00073723! (https://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.ny00073723), US00103228! (https://plants.jstor.org/ stable/viewer/10.5555/al.ap.specimen.gh00037014?loggedin=true). FIGURE 3. Holotype of Maguirellaria minutifolia (NY00073722!). Description: —Plants perennial with stem prostrate, up to 25 cm height, glabrous to glandular, branched, terete. Leaves lanceolate or linear, 1/4–1/2 shorter than the internodes 0.5–1.0 × (1.5–)2.0–4.0(–5.0) mm], sessile or petioled (the basal and middle ones), base cuneate, apex acute, glabrous or glabrescent on the abaxial surface (hairs whitish); stipules short, ovate, glabrescent. Inflorescence of terminal and axillary solitary flowers; pedicel 0.5–3.0 cm long; sepals 5, elliptic-ovate (about 2 × 1.5–1.8 mm ), 3-veined, acute to obtuse, green; petals 4, oblanceolate (1.0–1.5 × 3–5 mm long), about 2 times longer than the sepals, bifid (lobes 1–2 mm long), white; fruit about 2 × 3 mm , about as long as the sepals. Proposed vernacular name: —Small-leaves starwort. Habitat: —Edges of streams in pine woods and grassy areas; altitude 1800–1900 m a.s.l. Chorology: —Endemic to Dominican Republic , Province of Benefactor ( Liogier 1982 ). Chromosome number: —Unknown Conservation status: —This species is to be considered as DD (Deficient Data) according to the IUCN criteria ( IUCN 2016 ). Selected specimens examined: — DOMINICAN REPUBLIC . La Vega . Jarbacoa , La Tucilla , in open places, 2000 m a.s.l. , 15 August 1968 , Liogier 12168 (NY1511624!); between Valle Nuevo and San José de Ocoa , La Nevera , in wet, open places, vould forests, 2100 m a.s.l. , 18 October 1968 , Liogier 13151 (NY01511625!). San José de Ocoa . La Nevera , en bosque nublado, 2100 m a.s.l. , 06 April 1974 , Liogier 21563 (NY01511623!). Hispaniola, en bosque nublado, subida la Cotorra , La Lagunita , 1800 m a.s.l. , 15–19 June 1974 , Liogier 21756 (NY02027324!; molecular voucher in Greenberg & Donoghue 2011 ).