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FNA | Family List | FNA Vol. 12 | Euphorbiaceae

94b. Euphorbia austrotexana var. carrii Mayfield, J. Bot. Res. Inst. Texas 7: 636, fig. 2[row 3, center]. 2013
[C E]

Stems 6–13 cm. Leaves: blade linear to slightly lanceolate, apex acute. Dichasial bracts broadly ovate-lanceolate, base rounded. Seeds 1.4–1.5 × 1–1.1 mm, surface with irregular and not obviously concave depressions.

Flowering and fruiting spring. Sandy soils; of conservation concern; 0–200 m; Tex.

Variety carrii is restricted to Jim Hogg and Kenedy counties, Texas; M. H. Mayfield (2013) indicated that populations are confined to the South Texas Sand Sheet and apparently occur in the deepest sand areas of the region. B. L. Turner (2011) mistook collections of this taxon for the introduced, Old World E. exigua. The two species are not closely related and can be readily distinguished based on seed morphology.


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