Poa (Poa) (sect. Macropoa) Tzvelev

I.Poa subg. Poa sect. MacropoaF. Herm. ex Tzvelev, Novosti Sist. Vyssh. Rast. 9: 49. 1972. = Poa sect. Macropoa F. Herm., Hercynia 1: 457. 1939. nom. Inval., without Latin. Type. Poa longifolia Trin. Description. Perennials; hermaphroditic; tufts, with or without rhizomes, vegetative branching extra and or intravaginal; bulbs absent, or present (P. densa, P. diversifolia). Leaf sheaths of culms often compressed, strongly keeled but not winged; flag-leaf sheath margins fused mostly over 1 / 3 their length; ligules shorter than the blade width, truncate; blades usually firm, folded or V-shaped, sometimes involute margined. Spikelets strongly compressed, bulbifery absent (rare but unconfirmed as “ P. densa var. vivipara ”); callus glabrous; lemmas strongly 5 – veined, sub-coriaceous, glabrous; palea keels sparsely to densely scabrous, glabrous. Flowers bisexual; anthers 1.2–3.5 mm long (0.5–1 mm in P. greuteri Gabrieljan). Clade code: Php. Species included. Poa binodis Keng ex L. Liou, P. bomiensis C. Ling, P. bucharica Roshev. (and 3 subspp.) **, P. densa *, P. diversifolia *, P. golestanensis H. Scholz & H. Akhani, P. greuteri Gabrieljan, P. iberica *, P. koksuensis Golosk., P. longifolia (and three subspp.) **, P. paryadrica Boiss. *, P. primae Tzvelev, P. sibirica Roshev. (and 2 subspp.) *, P. subinsignis Prob. Distribution. All 14 species are from easternmost Europe (Crimea, North Caucasus, and European Russia) and Asia, from Lebanon, Turkey and eastward into central Asia, China (Zhu et al. 2006, p. 267, spp. 13–16) and Asian Russia to Far East Russia. Comments. All sect. Macropoa species studied align in the P - clade with plastid data and hp - clade based on nrDNA profiles (Php). Here only the five species recorded or reported for Turkey are listed. Overall, there are 14 or more species in the section. Unlike the Poa bulbosa complex s. s. they have strongly 5 - veined lemmas. Only P. densa and P. diversifolia have bulbs, and neither of these, nor any other Macropoa species, have been confirmed as having bulbiferous forms. Poa aitchisonii Boiss. might belong here but has scant callus hairs and lax leaf blades and seems better placed in P. sect. Homalopoa (* = taxa in the analyses). In Turkey: Poa densa, P. diversifolia, P. longifolia subsp. meyeri, and P. paryadrica have been confirmed. Poa longifolia subsp. longifolia and P. iberica have been reported (Edmondson 1985) but are here considered absent, the reports belonging to the latter two fore mentioned taxa. Poa binodis and P. bomiensis from the mountains of China (eastern Xizang and western Sichuan) were included in the section by Zhu et al. (2006), therein only known to RJS from their Type Specimens, need further study.