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|Jepson eFlora: Taxon page
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|Family: Poaceae (Gramineae)||View Description||Dichotomous Key|
|Genus: Spartina||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Spartina alterniflora Loisel.
Habit: Rhizome 4--7 mm wide, short, stout. Stem: 1 or in small clumps, 6--25 dm, base 5--14 mm wide, thick, internodes fleshy. Leaf: blade 20--55 cm, base 4--25 mm wide, flat when fresh or inrolled near tip; ridges on upper surface +- 6 per mm. Inflorescence: +- open, 10--40 cm, 7--22 mm wide; branches 5--30, loosely overlapping, loosely appressed or spreading (to 10°--20°), 4.5--13 cm, 3--5 mm wide. Spikelet: 8--15 mm; glume, lemma keels glabrous to softly shaggy-hairy; lower glume 4--10 mm; upper glume 8--15 mm; lemma 7.5--11 mm. Chromosomes: 2n=56,70.
Ecology: Coastal salt marshes; Elevation: < 10 m. Bioregional Distribution: CCo (San Francisco Bay); Distribution Outside California: native to eastern North America. Flowering Time: Jul--Sep Note: Will likely spread unless eradicated; aggressive hybrids with Spartina foliosa have been reported in San Francisco Bay.
eFlora Treatment Author: John R. Baird & John W. Thieret
Jepson Online Interchange
Previous taxon: Spartina
Next taxon: Spartina densiflora
Citation for this treatment: John R. Baird & John W. Thieret 2017. Spartina alterniflora, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=45038, accessed on February 26, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 26, 2017.