Computer-generated key and descriptions of Phleum species (Poaceae). Issue 1 (2nd January 2016)

• Record Type: Journal Article
• Authors: El-Gazzar, A.; Eisa, A. M.; Khattab, A. A.
• Is Part Of: Webbia. Volume 71:Issue 1(2016)
• Page Start: 25
• Page End: 35
• Publication Date: 2016-01-02
• Subjects: DELTA -- identification -- morphology -- Maillea -- Phalaris -- Phleum -- Pseudophleum; Botany -- Periodicals; 580
• DOI: 10.1080/00837792.2015.1119955
• Languages: English
• ISSNs: 0083-7792

Abstract

Abstract : Conflicting and often cursory taxonomic accounts of the genus Phleum L. (Poaceae: Pooideae) have led to difficulties in discriminating among the taxa. Apart from the two notho-species Phleum × brueggeri and Phleum × viniklarii without any synonyms, more than 250 synonyms are on record for the remaining 16 species and their infra-specific taxa. The limited range of characters used in traditional keys to these taxa greatly reduced their applicability. To overcome these difficulties, the key-generating program suite DELTA was used to construct a conventional key to 15 Phleum species (of which five are represented by two subspecies each), based on 20 gross morphological and anatomical characters systematically compared and recorded from culms, leaves and spike-like panicles. For lack of specimens, Phleum iranicum and the two hybrid species are not included in the key. The characters and their states were so precisely defined that only 13 of them were needed to single out each taxon in the key. Detailed descriptions of all taxa based on the entire range of 20 characters are provided to aid identification.