Kentucky Plant Atlas




  
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Montiaceae [Portulacaceae*] Claytonia virginica
Claytonia virginica L.
ALI: no HAB: r-7,5,10,4, n/a, D, 3 ABU: g10, s10, -2
This is a variable species, widespread across eastern states, except the southeastern Coastal Plain. Chromosome numbers have a wide range (2n = 12 to 190), and several cytotypes can be sympatric, perhaps with some phenological segregation (Lewis 1976). Moreover, endopolyploidy may be relatively frequent in Claytonia (Lewis et al. 1971, McIntyre 2012). No attempt yet in Ky. has been made to separate such variants, or even the largely southern var. acutiflora DC., which has leaves only 1-2 (4) mm wide (versus mostly 5-10 mm), and chromosome numbers based on n = 6 or 7 (versus 8 or more). That taxon is known in s. Ill., and probably occurs in w. Ky. (Lewis & Semple 1977; Cr). Although virginica is widespread and often abundant, especially in old unplowed lawns and pastures, the species has a remarkably uneven local distribution. It seems to be promoted by delayed mowing and grazing during spring, but it generally declines in deeper shade. Removal of turf in fall to winter can greatly increase growth of Claytonia in spring (B. Rasp, pers. comm.). Its edible tubers may have been eradicated where feral hogs roamed during early settlement; see also Howe & Bratton (1976) and Howe et al. (1981).