— castanea, ix, 73.
— cephalophora, vii, 269; x, 268; xliii, 92.
— cespitosa, x, 266; xi, 318; xii, 297.
— cherokeensis, xi, 160.f
— chordorrhiza, xlix, 44.
— collecta, xi, 314.f
— columbiana, xxx, 62.f
— compacta, xxvii, 237.f
— concinna, xi, 152.
— concolor, xi, 309.