View source for Puerto Rico Hat Palm

{{SPlantbox
|familia=Arecaceae
|genus=Sabal
|species=causiarum
|common_name=Puerto Rico hat palm
|name_ref=Flora - A Gardener's Encyclopedia
|habit=palm-cycad
|habit_ref=Flora - A Gardener's Encyclopedia
|Max ht box=50
|Max ht metric=ft
|height_ref=Flora - A Gardener's Encyclopedia
|Max wd box=20
|Max wd metric=ft
|width_ref=Flora - A Gardener's Encyclopedia
|lifespan=perennial
|life_ref=Flora - A Gardener's Encyclopedia
|exposure=sun
|sun_ref=Flora - A Gardener's Encyclopedia
|flowers=white
|Temp Metric=°F
|min_zone=9
|usda_ref=Flora - A Gardener's Encyclopedia
|max_zone=12
|image=Sabal causiarum.jpg
|image_width=180
}}
'''''Sabal causiarum''''', commonly known as the '''Puerto Rican hat palm''', is a species of [[Arecaceae|palm]] which is native to [[Hispaniola]], [[Puerto Rico]] and the [[British Virgin Islands]].

''Sabal causiarum'' is a [[fan palm]] with solitary, very stout stems, which grows up to {{convert|10|m|ft|0}} tall and {{convert|35|-|70|cm|in|0}} in diameter.  Plants have 20–30 leaves, each with 60–120 leaflets.  The [[inflorescence]]s, which are branched, arching or pendulous, and longer than the leaves, bear [[globose]], black fruit.  The fruit are {{convert|0.7|-|1.1|cm|in|1}} in diameter; fruit size and shape are the main characteristics by which this species differs from ''[[Sabal domingensis]]''.<ref name = Henderson>{{cite book |last=Henderson |first=Andrew |authorlink= Andrew Henderson (botanist)|coauthors=[[Gloria Galeano]]; [[Rodrigo Bernal]] |title=Field Guide to the Palms of the Americas |year=1995 |publisher=Princeton University Press |location=Princeton, New Jersey|pages=64–65}} ISBN 0-691-08537-4</ref>

{{Inc|
Sabal causiarum, Becc. (Inodes causiarum, Cook). Porto Rico Hat-palm. Yaray. Trunk to 40 or 50 ft. and 2 ft. thick, columnar or nearly so, light gray or nearly white: lf .-bases splitting into fibers and more or less remaining as long ribbons: lvs. about 12 ft. long, the blade and petiole about equal in length but both surpassed by the infl., the petiole keeled near the end above: fr. 1/3 - 1/2 in. diam., grayish, with a finely rugose or nearly smooth chestnut-brown seed.
}}

:''More information about this species can be found on the [[Sabal|genus page]].''