. Contributions from the Botanical Laboratory, vol. 8. Botany; Botany. I^MaObMUbMU 38 PROCEEDINGS OF THE Phlox cuspidata, applied to a Texan plant by Scheele^ in 1850, is sometimes regarded as synonymous with P. pilosa, but the description fits better P. drummondii Hooker. In revising the Polemoniaceae in 1870, Gray^ assigned the glabrous-leaved phases of P. pilosa, such as are especially common in the Gulf States, to a variety detonsa. This was raised to species rank by Small ;^ but it grades too freely into the wide-spread variety of P. pilosa to be so maintained. One more name remains to be
. Contributions from the Botanical Laboratory, vol. 8. Botany; Botany. I^MaObMUbMU 38 PROCEEDINGS OF THE Phlox cuspidata, applied to a Texan plant by Scheele^ in 1850, is sometimes regarded as synonymous with P. pilosa, but the description fits better P. drummondii Hooker. In revising the Polemoniaceae in 1870, Gray^ assigned the glabrous-leaved phases of P. pilosa, such as are especially common in the Gulf States, to a variety detonsa. This was raised to species rank by Small ;^ but it grades too freely into the wide-spread variety of P. pilosa to be so maintained. One more name remains to be considered, and in order to account for the interpretation of it adopted, the northwestern representative of the species must be referred to at this point. Over much of its range, P. pilosa has its inflorescence strongly glandular, with only occasional glandless variants. On the prairies of the upper Mississippi basin, however, the hairs on the inflorescence are normally glandless, dense, and lustrous, constituting a well-marked geographic variety. In describing their P. argillacea, Clute and Ferriss* contrasted it with this prairie Phlox, noting it to have the calyx and bracts glandular- hispid, and emphasizing its *'lighter green leaves, greater height, less compact flower clusters, restricted habitat, and above all . . pale flowers and later and longer season of bloom.'' Most of these, however, are the very respects in which Linne's P. pilosa differs from the prairie variety. Plants with pallid or near-white corollas are common in colo- nies of P. pUosa,^ and indeed the Plukenet specimen, which is taken as the type of the species, was one of these. When the Illinois ^'P. argillacea'^ is grown beside such Virginian material, the only way in which they can be distinguished is by the greater vigor of the former, a difference of horticul- tural but not taxonomic significance. It can only be con- cluded that technically P. argillacea Clute and Ferriss is synonymous with P. pilos
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