Poa secunda subsp. juncifolia var. juncifolia (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

publication ID

https://dx.doi.org/10.3897/phytokeys.110.27750

persistent identifier

https://treatment.plazi.org/id/F8C21A6F-744A-708A-5D27-B8065C22215D

treatment provided by

PhytoKeys by Pensoft

scientific name

Poa secunda subsp. juncifolia var. juncifolia (Scribn.) Soreng, comb. et stat nov.
status

 

Poa secunda subsp. juncifolia var. juncifolia (Scribn.) Soreng, comb. et stat nov. Fig. 4B. View Figure 4

Basionym.

Poa juncifolia Scribn., Bull. Div. Agrostol., U.S.D.A. 11: 52, pl. 8, 1898.

Synonyms.

Poa brachyglossa Piper, P. fendleriana var. juncifolia (Scribn.) M.E. Jones, P. juncifolia Scribn., P. juncifolia subsp. juncifolia , P. juncifolia subsp. porteri D.D. Keck (?), P. nevadensis var. juncifolia (Scribn.) Beetle.

Notes.

The type and other material identified as Poa juncifolia subsp. porteri by Keck combine pubescent lemmas with narrow panicles, firm blades and short ligules on lateral shoots and appear to RJS to be intermediate in form between varieties juncifolia and secunda ( canbyi form).

Habitat and range.

Pine forests and steppe, riparian and alkali meadows, in well-drained to poorly-drained, light to heavy, often alkaline or saline soils. Range of the subspecies (Fig. 2B View Figure 2 ), but infrequent in the California Floristic Province and south-western states.

Chromosome numbers.

Numbers reported as P. juncifolia : 2 n = 42, 60, 62, 63, 63-64, 78, 84. The one 2 n = 42 count was originally published by Hartung (1946) as P. cusickii , but RJS re-determined the California voucher as P. secunda subsp. juncifolia var. juncifolia .

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Poa