BIRD'S-EYE PRIMROSE. See Primula farinosa.
BIRD'S-FOOT. See Ornithopus.
BIRD'S-FOOT FERN. See Pellæa ornithopus.
BIRD'S-NEST FERN. See [Asplenium Nidus.]
BIRTHWORT. See [Aristolochia.]
BISCUTELLA (from bis, double, and scutella, a saucer; in allusion to the form of the silicles). Buckler Mustard. ORD. Cruciferæ. Perennial or annual herbaceous plants, usually hispid, but sometimes downy or smoothish. Flowers yellow, scentless; pedicels filiform, bractless. Leaves oblong, entire, toothed or pinnatifid, somewhat radical or cauline. Stems round, erect, usually corymbosely branched at the top by racemes, which, when in flower, are short, but elongated at the time of fruiting. All the species produce seeds freely. The annuals should be sown in the open borders. Some of the perennial kinds are well adapted for ornamenting rockwork, in a dry, sunny situation. Of the annuals, columnæ, lyrata, maritima, and obovata, are best. Of the perennials, coronopifolia, lævigata, and sempervirens are the most desirable, but none are worth cultivation outside botanical collections.
BISERIAL, or BISERIATE. Arranged in two parallel rows.
BISERRATE. Toothed in a saw-like manner, but with the primary teeth again serrated.
BISULCATE. Doubly furrowed.
BITERNATE. Twice ternate.