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Plantago sect. Oliganthos in southern South America, a taxonomic revision
Author(s) -
Rahn Knud
Publication year - 1984
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1984.tb01986.x
Subject(s) - biology , herbarium , subspecies , botany , sympatric speciation , taxon , plantago , ecology
Seven species are recognized: Plantago pulvinata Spegazzini, P. uniglumis Walp., P. sempervivoides Dusen, P. correae Rahn sp. nov., P. tehuelcha Spegazzini, P. moorei Rahn sp. nov., and P. barbata G. Forster; the last with five subspecies: ssp. barbata; ssp. gigantea Rahn ssp. nov.; ssp. austroandina Rahn ssp. nov.; ssp. monanthos (Dum. d'Urv.) Rahn stat. nov.; and ssp. muscoides (J. D. Hook.) Rahn stat. nov. 594 herbarium specimens from 399 collections have been studied and 61 collections cultivated. The chromosomes were counted in 56 of these: 2n = 23, 24, 48, 68, 72, and 96. Sympatric taxa usually occupy different ploidy levels. Populations with 2n = 48 of four subspecies of P. barbata are separated geographically in Patagonia by ssp. barbata with 2n = 72, which occupies the area between them. 846 cultivated plants and 312 herbarium collections have been measured. Numerical taxonomic methods were used, employing both sets of measurements. Statistics are used in keys and descriptions.