The grass family Poaceae is the largest group of flowering plants present on the island of Puerto Rico. With 258 species, it represents 9% of all Angiosperms and 33% of all Monocots.
The following is a list of grass species known to exist in Puerto Rico, separated by genus:
Agrostis edit
Andropogon edit
Anthephora edit
Aristida edit
Arthraxon edit
Arthrostylidium edit
Arundinella edit
Arundo edit
Avena edit
Axonopus edit
Bambusa edit
Bothriochloa edit
Bouteloua edit
Brachyelytrum edit
Cenchrus edit
Chloris edit
Chusquea edit
Coix edit
Cymbopogon edit
Cynodon edit
Dactylis edit
Dactyloctenium edit
Dichanthelium edit
Dichanthium edit
Diectomis edit
- Diectomis fastigiata
- Diectomis argillacea
- Diectomis bicornis
- Diectomis ciliaris
- Diectomis dolichophylla
- Diectomis eriantha
- Diectomis horizontalis
- Diectomis insularis
- Diectomis ischaemum
- Diectomis longiflora
- Diectomis nuda
- Diectomis panicea
- Diectomis sanguinalis
- Diectomis setigera
- Diectomis similis
- Diectomis villosa
- Diectomis violascens
Echinochloa edit
Eleusine edit
Eragrostis edit
Eremochloa edit
Eriochloa edit
Eriochrysis edit
Euclasta edit
Eustachys edit
Gymnopogon edit
Gynerium edit
Hackelochloa edit
Heteropogon edit
Holcus edit
Homolepis edit
Hymenachne edit
Hyparrhenia edit
Hypogynium edit
Ichnanthus edit
Imperata edit
Isachne edit
Lasiacis edit
Leersia edit
Leptochloa edit
Leptochloopsis edit
Leptocoryphium edit
Lithachne edit
Lolium edit
Melinis edit
Microstegium edit
Muhlenbergia edit
Olyra edit
edit
Oryza edit
Panicum edit
Pappophorum edit
Paspalidium edit
Paspalum edit
- Paspalum arundinaceum
- Paspalum bakeri
- Paspalum blodgettii
- Paspalum boscianum
- Paspalum caespitosum
- Paspalum clavuliferum
- Paspalum conjugatum
- Paspalum convexum
- Paspalum decumbens
- Paspalum densum
- Paspalum dilatatum
- Paspalum dispar
- Paspalum distichum
- Paspalum fasciculatum
- Paspalum fimbriatum
- Paspalum laxum
- Paspalum macrophyllum
- Paspalum maritimum
- Paspalum millegrana
- Paspalum minus
- Paspalum molle
- Paspalum notatum
- Paspalum orbiculatum
- Paspalum paniculatum
- Paspalum parviflorum
- Paspalum paucispicatum
- Paspalum pleostachyum
- Paspalum plicatulum
- Paspalum pulchellum
- Paspalum rupestre
- Paspalum secans
- Paspalum setaceum
- Paspalum urvillei
- Paspalum vaginatum
- Paspalum virgatum