
Belongs within: Juncaceae.
The section Poiophylli of the genus Juncus includes grassy-leaved rushes that may be mistaken for true grasses (Healy & Edgar 1980).
Characters (from Healy & Edgar 1980): Plant tufted or rhizomatous; stems usually leafy, rarely only basal sheaths present; leaves flat or channelled, rarely cylindrical; inflorescence terminal.
<==Juncus sect. Poiophylli |--J. ambiguus Gussone 1827HE80 [incl. J. bufonius var. halophilusH93] |--J. bufonius Linnaeus 1753HE80 | |--J. b. var. bufoniusHE80 [=J. bufonius var. genuinus Coutinho 1890FC99] | |--J. b. var. congestus Wahlenberg 1820HE80 [incl. J. bufonius var. congdoniiH93] | |--J. b. var. occidentalis non J. occidentalisH93 | `--J. b. var. parviflorus Ascherson & Graebner 1904HE80 |--J. dichotomus Elliott 1817 [incl. J. cognatus]HE80 | |--J. d. var. dichotomusV72 | `--J. d. var. platyphyllusV72 |--J. gerardii Loiseleur-Deslongchamps 1809HE80 |--J. homalocaulis von Mueller 1853HE80 |--J. imbricatus Laharpe 1827HE80 | |--J. i. var. imbricatusHE80 | `--J. i. var. chamissonis (Kunth) Buchenau 1906HE80 |--J. squarrosus Linnaeus 1753HE80 `--J. tenuis von Willdenow 1799 [incl. J. involucratus Kirk 1877 (preoc.)]HE80 |--J. t. var. tenuisHE80 |--J. t. var. anthelatus Wiegand 1900HE80 `--J. t. var. secundusHE80
*Type species of generic name indicated
References
[FC99] Fernández Carvajal, M. C. 1999. Lectotipificación de un junco de Coutinho. Studia Botanica 18: 149–152.
[HE80] Healy, A. J., & E. Edgar. 1980. Flora of New Zealand vol. 3. Adventive cyperaceous, petalous and spathaceous monocotyledons. P. D. Hasselberg, Government Printer: Wellington (New Zealand).
[H93] Hickman, J. C. (ed.) 1993. The Jepson Manual: Higher Plants of California. University of California Press: Berkeley (California).
[V72] Voss, E. G. 1972. Michigan Flora. Part I. Gymnosperms and Monocots. Cranbrook Institute of Science and University of Michigan Herbarium.