Poa secunda subsp. juncifolia var. nevadensis (Vasey ex Scribn.) Soreng, comb. et stat nov.

Soreng, Robert John & Gillespie, Lynn J., 2018, Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA, PhytoKeys 110, pp. 101-121 : 111

Poa secunda subsp. juncifolia var. nevadensis (Vasey ex Scribn.) Soreng, comb. et stat nov. Fig. 4C

Basionym.

Poa nevadensis Vasey ex Scribn., Bull. Torrey Bot. Club 10: 66, 1883.

Synonyms.

Atropis nevadensis (Vasey ex Scribn.) Beal, Atropis pauciflora Thurb., Panicularia thurberiana Kuntze, Poa nevadensis Vasey ex Scribn., Poa pauciflora (Thurb.) Benth. ex Vasey, Poa tenuifolia var. scabra Vasey ex Scribn. (nom. inval.), Poa thurberiana (Kuntze) Vasey, Puccinellia nevadensis (Vasey ex Scribn.) Ponert.

Habitat and range.

Open forests and steppe, in light, well-drained to heavier soils. Range of the subspecies (Fig. 2B ), but mostly absent from west side of the Sierra Nevada and westward. Collected once in New Mexico ( Soreng 1985).

Chromosome numbers.

Numbers reported as P. nevadensis : 2 n = 62 (x2), 62-63, 63 (x7), 64, 64-66 (x2), ≈ 65, 70.

Figures

Figure 2. Distribution of Poa secunda subspecies in North America: subsp. secunda (yellow); subsp. juncifolia (blue).

Figure 4. Poa secunda infraspecies illustrations (reproduced from Hitchcock 1935): A P. s. var. ampla panicle and floret B P. s. var. juncifolia panicle and floret C P. s. var. nevadensis panicle and floret D P. s. var. gracillima habit, panicle and floret E P. s. var. scabrella habit, panicles, spikelet and floret F, G P. s. var. secunda habit, panicle and floret variations A, B, C = subsp. juncifolia D, E, F, G = subsp. secunda. Scale bar: 5 mm for florets, 10 mm for spikelet, 5 cm for habits and panicles (10 cm for E habit and panicles).