Cortaderia bifida
Cortaderia aristata
Cortaderia trianae
Arundineae
Arundineae
Synoptic taxonomy of Cortaderia Stapf (Danthonioideae, Poaceae)
Testoni, Daniel
Linder, H. Peter
PhytoKeys
2017
2017-01-11
76
39
69
E8D6C3D8-6408-7B7C-6884-41C85E61DE09
Pilg., Bot. Jahrb. Syst. 37: 374. 1906.
Pilg., Bot. Jahrb. Syst. 37: 374. 1906.
Liliopsida
Poaceae
Cortaderia
CoL
Plantae
Cortaderia bifida
Poales
22
61
Tracheophyta
species
bifida
Cortaderia bifidaPilg., Bot. Jahrb. Syst. 37: 374. 1906. Type: Peru, "zwischen den Tambo Yuncacoya und Ramospata (Weg von Sandia nach Chunchusmayo), 2000-2400m", 27 Jul. 1902, A. Weberbauer 1328 (lectotype, designated as holotype by Connor & Edgar, Taxon 23: 597 (1974): B-100217561! (http://ww2.bgbm.org/Herbarium/specimen.cfm?Barcode=B100217561); isolectotype: US!). Cortaderia aristataPilg. Bot. Jahrb. Syst. 37: 375. 1906. Type: Peru, Prov. Huamalies, Dep. Huanuco, "Berge suedwestlichvon Monzon, 3400-3500m", 11 Jul. 1903., A. Weberbauer 3349 (lectotype, designated as holotype by Connor & Edgar, Taxon 23: 597 (1974): B-100217562! (http://ww2.bgbm.org/Herbarium/specimen.cfm?Barcode=B100217562); isolectotypes: K!, US!). Cortaderia trianaeStapf ex Conert, Syst. Anat. Arundineae100. 1961. Type: New Granada, February 1892, J. Triana 289 (lectotype, designated as holotype by Conert, Syst. Anat. Arundineae100 (1961): K!).
Etymology. bis(Latin) = twice + fidu, divide, this presumably refers to the lemma setae.
Taxonomy. This species can be diagnosed by the combination of the lacerated sheath bases, the long awns and especially the long setae. The shape of the lemmas with lobes and setae are shared with Cortaderia hapalotricha, and the curly fibrous leaf remains are similar to Cortaderia roraimensis. It is separated from Cortaderia roraimensisby the hairy lemmas and by the much longer awns and setae. It differs from Cortaderia hapalotrichaby the glabrous adaxial surface above the ligule and the scaberulous inflorescence branches. From the other tall species, Cortaderia nitida, it can be separated by the longer awns (more than 8 mm long). The long awns and setae result in the inflorescences looking similar to those of Cortaderia peruviana, but the bases of the plants are quite different. Consequently, it can be difficult to determine collections which consist only of inflorescences. The leaf anatomy (Fig. 3H), in transverse section, shows shallow abaxial groves and deep adaxial clefts. Adaxially there appear to be no papillae (different from the Cortaderia hapalotrichaanatomy). Abaxially below the epidermis are large colourless cells. The outer bundle sheath of the primary vascular bundles are completely lignified. Thus broadly similar to the Cortaderia halalotrichaanatomy, but differing in a number of traits.