Hardy perennial flowers for April, in America

HARDY PERENNIALS. FLOWERING IN APRIL. 1. Anemone thalictroides, pl. Double wood Anemone; white. 1. Anemone pulsatilla. Pasque flower; blue. 1. Anemone hepatica, pl. Double Hepaticas; blue. 1. Viola odorata, pl. Double white and blue European violets. 1. Omphalodes verna. Blue Venus Navel wort. 1. Polemonium reptans. Greek Valerian; blue. 1. Phlox stolonifera. Creeping Phlox; red. 2. Phlox divaricata. Early purple Phlox. 1. Primula veris. The Cowslip; yellow and red. 1. Primula polyantha. The Polyanthus; purple. 1. Primula auricula. The Auricula; purple. 1. Viola tricolor. Heart's Ease or Pansy; many colors and sorts. 1. Viola grandiflora. Purple Pansy. 2. Saxifraga crassifolia. Thick-leaved Saxifrage; lilac. 1. Phlox subulata. Moss pink Phlox. 1. Phlox nivea. White Moss Pink. 1. Gentiana acaulis. Dwarf Gentian; purple. 1. Adonis vernalis. Spring fl. Adonis; yellow. 2. Dodecatheon meadia. American Cowslip; lilac. 2. Pulmonaria virginica. Virginian Lungwort; purple. 2. Alyssum saxatile. Golden basket; yellow. 2. Trollius europeus. European Globe flower; yellow. 1. Corydalis cucularia. Breeches-flower; white.