Vascular Plants of North Carolina
Account for Wetland White Bluestem - Andropogon dealbatus   (Mohr) Weakley & LeBlond
Members of Poaceae:
Members of Andropogon with account distribution info or public map:
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Section 5 » Family Poaceae
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Author(Mohr) Weakley & LeBlond
DistributionMostly the outer southern Coastal Plain, ranging inland to southeastern Cumberland County and coastally north to Onslow County; reported also from Carteret County. Split off from A. capillipes in a paper by LeBlond and Weakley (2011).

Coastal Plain, NC to southern FL and eastern TX; southern NJ; Bahamas.
AbundanceUncommon. As this species was recently (2011) split from A. capillipes, there is uncertainty about its abundance level, especially as both species have similar ranges in the state. The NCNHP has added it to its Watch List (W7) in late 2022, with a State Rank of S2S4.
HabitatExposed shores of sinkhole ponds, depression meadows, wet pine savannas -- strictly a wetland species, as opposed to capillipes, which usually occurs in uplands.
PhenologyFlowering and fruiting September-October.
IdentificationThis is one of several NC bluestems with glaucous (chalky white or bluish white) stems and leaves. It is very similar to A. capillipes, from which it has been split off. A. dealbatus differs in growing in wetter habitats, has longer spikelets (mostly 3.5-3.9 mm long vs. 3.2-3.5 mm long in A. capillipes), and has broader leaves (averaging 5.0 mm wide vs. averaging 3.5 mm wide).
Taxonomic CommentsAnatherum dealbatum (Mohr ex Hackel) Weakley & LeBlond is a recent synonym (see Vorontsova et al. (2023 and JBRIT paper by Weakley and LeBlond in 2024). Formerly included within Andropogon capillipes.

While the genus Andropogon is quite easy to recognize in the field, ID of species is not so easy and there are no shortcuts. Readers are strongly advised to read the introductory paragraphs in Weakley (2025) and to use his key. Once one has successfully keyed out several species, or compared collections with verified specimens, one can learn to recognize them in the field.
In 2023 Vorontsova et al. published a paper (click on our References tab) in which they split off Anatherum from Andropogon. Most of the former are found in the Americas and Africa. For now, until the dust settles, the NCVP taxon editors will provide the new names in Anatherum as synonyms of the traditional Andropogon.
Other Common Name(s)None
State RankS2S4
Global RankG5
State StatusW7
US Status
USACE-agcp
USACE-emp
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B.A. SorrieSame data New HanoverPhoto_natural
B.A. SorrieCarolina Beach SP, natural depression pond, Aug 2013. New HanoverPhoto_natural
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