Poa botryoides (Trin. ex Griseb.) Komarov

Olovona, Marina V. & Nikolin, E. G., 2018, Bluegrasses (Poa L., Poaceae) of Sakha (Yakutia) Republic, an annotated checklist, Adansonia (3) 40 (7), pp. 89-102 : 96

27. Poa botryoides (Trin. ex Griseb.) Komarov

In Flora of Kamchatka 1: 177 (1927). — Rozhevitz, Flora of the USSR 2: 404 (1934). — Tzvelev, Arctic Flora of the USSR 2: 154 (1964). — Perfiljeva, Identification Book of High Plants of Yakutia: 75 (1974). — Olonova, Flora of Siberia 2: 181 (1990).

P. attenuata subsp. botryoides (Trin. ex Griseb.) Tzvelev, Grasses of

the USSR: 473 (1976).

LECTOTYPUS. — “In pratis siccis transbaicalensibus, 1829, Turczaninow.” ( LE!) ( Tzvelev 1976: 474). — Basionym: P. serotina var. botryoides Trin. ex Griseb. — Steppes, dry rocky and gravel slopes: Ald., Arc, U-L., C-Y, Y-I .

GENERAL DISTRIBUTION. — Sib., Rus. Far East, Mong., Jap.-Chin.

REMARK

Often combined with a similar species P. stepposa , however L. Sergievskaya (1961) noted, that P. stepposa clearly differs from P. botryoides with wide, up to 4 cm, panicle and stem, leafy above its middle. In her opinion Poa botryoides is a more xeromorphic species and replaces P. stepposa in Eastern Siberia. Poa botryoides possesses a high modification variability. When it grows at high temperatures and lack of moisture, it seems to be able to form dwarfish forms, returning to normal habitus when growing under optimal conditions. These dwarf forms are most likely not identical to the Central-Asian P. attenuata , which reaches the mountains of Southern Siberia, predominantly in the Western part. The sample from the Central Yakutia, (Tabaginsky Cape, 35 km of the Pokrovsky tract, SW slope of the bank of the Lena river, mixed forb-grass steppe. 17.VI.2004. Nikolin E.G.), identified as Poa arctostepporum Probat. , rather belongs to P. botryoides , being its dwarfish form.