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Paspalum Linnaeus. Subfamily: Panicoideae. Tribe: Paspaleae. Subtribe: Paspalinae. supertribe: Panicodae. clade: "PACMAD". Paspalum, Crown Grass, Beadgrass.

Contributed by Alan S. Weakley & Richard J. LeBlond

Key to Paspalum

A genus of 300-400 species, of tropical and warm temperate regions.

ID notes:The lower glume is absent from the majority of our species, and when present is much reduced. (Both glumes are absent in two species: Paspalum eglume and P. malacophyllum.) The lower floret is sterile and consists of a lemma with or without a rudimentary palea. The upper floret is fertile and consists of a lemma and well-developed palea enclosing the caryopsis. Regarding paired spikelets, the second spikelet is often missing or rudimentary. The pedicel/rachis subtending what appears to be a lone spikelet needs to be examined closely to determine whether or not a second pedicel is attached to it. The term “paired spikelets” is misleading. In our species, it refers to a single fertile spikelet with an axillary pedicel branching off the main pedicel below the spikelet. The axillary pedicel is either empty or with a rudimentary and sterile spikelet. We have chosen to use "blade" in place of "leaf blade" (used in Allen and Hall 2003); these terms appear to be completely analogous and we choose to drop the term "leaf" in light of apparent redundancy.

Ref: Allen & Hall (2003) In Flora of North America Editorial Committee (2003a); Banks (1966); Franck & Lange (2019) In Weakley et al. (2019a); Hall (2003) In Flora of North America Editorial Committee (2003a); Hitchcock & Chase (1917); Silveus (1942); Wipff & Jones (1994). Show full citations.

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image of plant© Gary P. Fleming | Paspalum fluitans | Original Image ⭷
image of plant© Gary P. Fleming | Paspalum dissectum | Original Image ⭷
image of plant© Gary P. Fleming | Paspalum urvillei | Original Image ⭷

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