Helmut Freitag

From the hygrohalophyteBorszczowia aralocaspicaBunge (Chenopodiaceae), a new leaf type with 1‐layered chlorenchyma is described as “borszczovoid” and compared with other leaf types in subfamily Salsoloideae. The chlorenchyma is suspected to represent a unique C₄type. Evidence is cited from anatomical studies and documented by micrographs and Carbon isotope determinations (ä¹³C values). The 1‐layered photosynthetic tissue combines all essential anatomical characters of a 2‐layered chlorenchyma of regular C₄plants and is in intimate contact with concentrically arranged peripheral bundles. The ä¹³C values are − 13.03 ‰ from young stems and − 13.78 ‰ from leaves. The results are discussed in the anatomical, physiological and taxonomic framework. In addition, from distantly‐relatedSuaedaspecies of section Conosperma the conospermoid leaf type is re‐described. It is characterized by typical palisade and Kranz layers and differs from the C₄suaedoid type by an external water‐storaging hypodermis and an arrangement of Kranz cells reminiscent of the atriplicoid type from subfamily Chenopodioideae. From eight other species of Chenopodiaceae ä¹³C values are given for the first time.

Freitag, H., Vural, M. & Adigüzel, N.: A remarkable new Salsola and some new records of Chenopodiaceae from Central Anatolia, Turkey. — Willdenowia 29: 123–139. 1999. — ISSN 0511-9618. The chenopod flora of a badland area 120 km WNW of Ankara was studied with the following results: Salsola grandis is described as a species new to science and illustrated, the presence of two species, viz. Anabasis aphylla and Atriplex aucheri, not listed in ‘Flora of Turkey’ but earlier reported from E Anatolia by Russian authors, is confirmed, and four species, viz. Atriplex laevis, Halanthium kulpianum, Petrosimonia nigdeensis and Salsola nitraria, are newly recorded from NW Central Anatolia. Salsola grandis belongs to S. sect. Salsola s.str. and is distantly related to S. soda. From the number and frequency of halophytic and semi-desert chenopod species, particularly from the presence of both the rather isolated endemic Salsola grandis and the strongly disjunct Anabasis aphylla, the conclusion is drawn that the area SE of Nallıhan has a much drier climate than its surroundings. Very likely, the evolution of S. grandis has taken place there from Tertiary times onwards, and the other disjunct species might have invaded later during drier climatic phases of the Pleistocene or early Holocene.