A New Record of Ehretia (Ehretiaceae, Boraginales) for Thailand
THAI FOREST BULL., BOT. 47(1): 34–37. 2019. DOI https://doi.org/10.20531/tfb.2019.47.1.07 A new record of Ehretia (Ehretiaceae, Boraginales) for Thailand KANOKORN RUEANGSAWANG1,*, MANOP POOPATH2 & PRANOM CHANTARANOTHAI3 ABSTRACT Ehretia silvana, a tree from limestone habitat in Uthai Thani province, is newly recorded for Thailand. A description and illustrations are provided, together with a conservation assessment and a new key to the species of Ehretia in Thailand. KEYWORDS: Ehretia silvana, conservation assessment, taxonomy Accepted for publication: 25 February 2019. Published online: 25 March 2019 INTRODUCTION specimen [K001110196], designated by Mill, 1996; isolectotypes BM! [BM000603166], K! [K000998072], Ehretia P.Br. has a pantropical distribution and M! [M0188691, M0188692]). Figs. 1–2. comprises ca 50 species of trees to shrubs. The genus, formerly in Boraginaceae subfam. Ehretioideae, is Trees, 3–7 m tall; bark thin, rough, grey-brown, now classified under Ehretiaceae (Boraginales), and with elliptic lenticels, glabrous; branchlets terete, is distinguished by having a bifid style with two glabrous to sparsely puberulous with glandular stigmatic branches and drupaceous fruits with four trichomes when young. Leaves chartaceous, elliptic pyrenes (Gottschling & Hilger, 2004; Luebert et al., to broadly ovate, 12–18 × 7–12 cm, apex cuspidate 2016). This circumscription of the family is supported or acuminate, base oblique or rounded, margin entire; by molecular analysis using nrITS and cpDNA upper surface dark green, glabrous, lustrous; lower sequence data (Gottschling et al., 2014). Five species surface light green, usually puberulous, with scattered were enumerated in the most recent treatment of the in the axils of lateral veins or glandular trichomes genus for Thailand by Ruengsawang & Chantaranothai when young; lateral veins and venations impressed (2010), then still under Boraginaceae.
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