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Published In: Botanical Gazette 3(1): 1. 1878. (Bot. Gaz.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native

 

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1. Isoetes butleri Engelm. (Butler's quillwort) Pl. 17a,b; Map 34

Leaves 6–24 cm long, the outer surface of the base white to tan or brown. Velum covering less than 1/4 of sporangium. Sporangium walls usually with brown streaks. Sporangia 6–10 mm long, oblong. Megaspores white, mostly 0.45–0.65 mm in diameter, the surface smooth or with faint tubercles. Microspores grayish tan, papillose. 2n=22. April–June.

Scattered through the southern half of the state north to Lincoln County, but absent from the Mississippi Lowlands Division (Georgia to Texas, north to Illinois and Kansas). Shallow depressions and ledges of limestone glades and prairies, less commonly in limey areas of acidic glades and prairies or along ponds and creeks.

This species usually grows in calcareous or limey soils. It often grows in shallow depressions or other areas that have standing water in the late winter and early spring, at which time it produces new leaves. By the end of June when these areas become hot and dry, the leaves have withered back to the corms for the year. The leaves can be difficult to distinguish from those of several monocot species that grow in the same habitats, notably species of Allium, Juncus, and Eleocharis.

 
 


 

 
 
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