Jouvea, Fournier, 1876

Muchut, Sebastián E., Reutemann, Andrea G., Uberti-Manassero, Nora G. & Vegetti, Abelardo C., 2017, Synflorescence morphology of grasses with reduced terminal inflorescences: a case study of Jouvea (Cynodonteae, Chloridoideae, Poaceae), Phytotaxa 302 (3), pp. 241-250 : 247

Jouvea and subtribe Monanthochloinae

Jouvea , along with the subtribes Monanthochloinae , Muhlenbergiinae, Hilariinae, Scleropogoninae, and Boutelouinae, plus the genera Sohnsia , Allolepis , and Kalinia Bell & Columbus (2012: 91) , form a clade of species from the Western Hemisphere, and including a few Asian species of Muhlenbergia ( Peterson et al. 2016) . The only other species of Cynodonteae with inflorescences reduced to one spikelet belong to Monanthochloinae ( Distichlis acerosa , D. australis , and D. littoralis ) ( Bell & Columbus 2008).

Subtribe Monanthochloinae , similar to Jouvea , includes dioecious species occurring in saline habitats ( Bell et al. 2010, Peterson et al. 2016). In addition to having inflorescences reduced to one spikelet, the subtribe includes species with panicles of spikelets ( Distichlis laxiflora Hackel (1911: 141) , D. palmeri Fasset (1924: 984) , D. spicata Greene (1887: 415) , and some specimens of D. bajaensis Bell (2010: 59)) , and racemes of spikelets ( D. bajaensis , D. eludens ( Soderstrom & Decker 1964: 335) Bell (2008: 548) , D. humilis Philippi (1891: 86) and D. scoparia Arechavaleta & Balpardo (1897: 457)) ( Pilatti 2016) . Distichlis comprises species that are stoloniferous ( D. acerosa and D. littoralis ) and rhizomatous ( D. australis , D. bajaensis , D. eludens , D. humilis , D. laxiflora , D. palmeri , D. scoparia , and D. spicata ) ( Pilatti 2016). The trophotagma enrichment axes at the long internode zones may ( D. acerosa , D. australis , D. bajaensis , D. littoralis , D. scoparia , and some specimens of D. spicata ) or may not be present ( D. humilis , D. laxiflora , D. palmeri , and some specimens of D. spicata ) depending on the species and individual observed ( Pilatti 2016). When present, these axes are generally unbranched and do not form prophyllar systems ( Pilatti 2016). By contrast, Jouvea species have a constant and permanent presence of these axes, forming complex prophyllar branching systems.