Poa secunda subsp. secunda var. scabrella (Thurb.) 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 : 112

Poa secunda subsp. secunda var. scabrella (Thurb.) Soreng, comb. et stat nov. Fig. 4E

Basionym.

Atropis scabrella Thurb., Bot. California 2: 310-311, 1880. Poa scabrella (Thurb.) Benth. ex Vasey, Grass. U.S. 42, 1883.

Synonyms.

Atropis californica Munro ex Thurb., Atropis scabrella Thurb., Panicularia scabrella (Thurb.) Kuntze, Poa acutiglumis Scribn., Poa californica (Munro ex Thurb.) Scribn., Poa capillaris Scribn., Poa nudata Scribn., Poa orcuttiana Vasey, Poa scabrella (Thurb.) Benth ex Vasey, Puccinellia scabrella (Thurb.) Ponert, Sclerochloa californica Munro ex Benth.

Habitat and range.

Open pine forests, coastal scrub and coastal and Central Valley grasslands, in well-drained or heavier soils. Mainly in the California Floristic Province, but extending northwards in the Pacific North West and southeast into the Mojave Desert, where it is largely replaced by var. secunda .

Chromosome numbers.

Numbers reported as P. scabrella : 2 n = 44+f, 61-63, ≈ 62, 63 (x4), 64, ≈ 66, ≈ 68, 81 (x2), 82 (x3), 84 (x10, ≈ 84, 84+f, 86, ≈ 86 (x2), ≈ 88, ≈ 91, 104.

Figures

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).