Astragalus nurhakdagensis (sect. Hololeuce Bunge / Fabaceae), a new species from Turkey

Abstract

Astragalus nurhakdagensis, a new species from the south of Turkey was described, illustrated and compared to the closest taxa Astragalus hirsutus, A. dumanii and A. cataonicus from which it is set apart by a longer calyx length (13-14 mm) and calyx teeth (7-9 mm, longer than tube), white corolla colour, longer bracts (13-15 mm) and black hairy stripes below the stem nodes. In A. hirsutus the calyx length (6-10 mm) and calyx teeth are much smaller (2-3 mm long, shorter than tube), yellow corolla colour and without black hairy stripes. It also differs from A. dumanii with its longer stipules 9-2 13 mm (not 5-8 mm), bracts 13-15 mm (not 4-6 mm), calyx length 13-14 mm (not 7-10 mm) and calyx teeth 7-9 mm (not 2-4 mm), and also with spreading hairs (not adpressed) on the calyx and 7-9 pairs of leaflets (not 3-7 pairs). It is also differentiated from A. cataonicus with a white corolla colour (not lilac to pink), longer stipule 9-13 mm (not 5-7 mm), bracts 13-15 mm (not 6-12 mm) and longer calyx teeth 7-9 mm (not 5-7 mm). Prolate (A. nurhakdagensis, A. hirsutus and A. cataonicus) and subprolate (A. dumanii) shapes were determined in the tricolporate pollen grains. Perforate, granulate and reticulate ornamentation types were observed in the pollen grains in SEM. The seed shapes were reniform-globose in A. nurhakdagensis and A. dumanii, whereas reniform in A. hirsutus and A. cataonicus. Surface ornamentation of the seeds differed slightly; rugulate in A. nurhakdagensis and A. hirsutus, reticulate-rugulate in A. dumanii and reticulate-striate in A. cataonicus. Taxonomic description, micrographs of seeds and pollen surfaces and geographical distribution of the new species were provided. Conservation status was discussed.

Astragalus nordizensis (Fabacaea), a new species from Van province (Türkiye) belonging to section Hymenostegis

“…The genus is known to spread vigorously in the cold, semiarid, and arid regions of the Old World (approximately 2400 species), in western regions of North America (about 450 species), and especially along the Andean Mountains in South America (about 100 species) (Maassoumi 1998, Podlech and Zarre 2013). In Türkiye, it grows mainly in dry habitats on steppes throughout the east and central Anatolian Regions and includes at least 479 species (Chamberlain and Matthews 1970, Davis et al 1988, Aytaç et al 2000, Akan et al 2008, Podlech and Zarre 2013, Uzun et al 2021). Of these, there are 13 species belonging to the A. sect.…”