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Smilax Linnaeus. Greenbriar, Carrionflower, Smilax.

Contributed by Alan S. Weakley and Hannah Medford

Key to Smilax

A genus of about 220 species, woody vines and herbs, subcosmopolitan in temperate and tropical regions. Our deciduous species are a monophyletic group within Smilax, with a classic eastern North American/eastern Asian disjunction, and have been treated as section Nemexia or subgenus Luiste (Wilbur 2004, Fu et al. 2005); Li et al. (2011) found a complex phylogeny not easily reflected in a sectional taxonomy. Smilax berries and shoots provide important food sources for many wildlife species, including black bears (Ursus americanus). The clades shown in the key follow Qi et al. (2013).

ID notes: The carrionflowers or deciduous smilaxes (lead 1a) are sometimes mistaken for Dioscorea because of a superficial similarity. They can be readily distinguished even in vegetative condition by Smilax section Nemexia having 3 (-5) main veins, the 3 central rejoining at the leaf apex (vs. Dioscorea with 7-13 main veins), and secondary veins in a complex reticulate pattern (vs. Dioscorea with secondary veins forming simpler and largely perpendicular cross-connections between the primary veins). In the woody smilaxes (key lead 1b), the underground parts (while not easy or convenient to observe or collect) provide useful characters, used in the key and helpful (but not generally necessary for identification). "Tubers" are rounded, lumpy, and starch-filled thickenings (often borne in compound, rounded or elongate masses). "Rhizomes" are unthickened, straight underground stems, usually with swollen (but not tuberous) nodes. "Runners" are thinner, elongated rhizomes. "Rootstocks" are short, knotty underground stems, neither running nor tuberous. Coker (1944) remains a basic resource. Wilder (2020) provided a very valuable analysis of the morphology of S. auriculata, which is broadly applicable to the woody species of the genus.

Other Comments: The clades included in the key are from Qi et al. (2013).

Ref: Bullard & Allen (2013); Coker (1944); Duncan (1967); Fu et al. (2005); Godfrey (1988); Holmes (2002a) In Flora of North America Editorial Committee (2002a); Judd (1998); Li et al. (2011); Li et al. (2013); Mangaly (1968); Pennell (1916); Qi et al. (2013); Qi et al. (2023); Sorrie (2014a); Wilbur (2003); Wilbur (2004); Wilder (2020). Show full citations.

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Edwin Bridges | Smilax herbacea | Original Image ⭷
image of plant(c) Janet Wright, some rights reserved (CC BY-NC), uploaded by Janet Wright | Smilax auriculata source | Original Image ⭷
image of plant© Alan M. Cressler | Smilax herbacea | Original Image ⭷

Feedback

See something wrong or missing on about Smilax? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.