A new species of Mattiastrum (Boraginaceae) from Turkey

Hamzaoğlu E., Özbek F.

PHYTOTAXA, vol.568, no.2, pp.230-236, 2022 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 568 Issue: 2
  • Publication Date: 2022
  • Doi Number: 10.11646/phytotaxa.568.2.8
  • Journal Name: PHYTOTAXA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, CAB Abstracts
  • Page Numbers: pp.230-236
  • Gazi University Affiliated: Yes


Some samples belonging to the family Boraginaceae that look interesting due to their erect stem, dense stem leaves, small

flowers, and large nutlets have been collected around Tödürge Lake in the Zara district (Sivas, Turkey). As a result of the

detailed investigations, it has been determined that these specimens are attributed to the genus Mattiastrum and they are

similar to M. cappadocicum with their almost entire nutlets and their anthers attaching to the below part of the corolla

fornices. While the new samples and their closely related species M. cappadocicum show similarities with their radially

symmetrical, isopolar, 6-heterocolpate, and ectocingulate pollen grains, they differ in pollen size and shape, the length of

colpus and pseudocolpus, and exine sculpturing. The Zara specimens are also different from M. cappadocicum by their

dense imbricate stem leaves, oblong inflorescence, and completely glabrous, large (9.5–11 mm in diam.) nutlets with entire

margins, and we therefore conclude that they belong to a new species. The description, photographs, general ecological

preferences, conservation status in the light of current data, and also pollen morphological characteristics of the newly

identified species are given.