Changed 'tubercalala' to 'tuberculata'. Page 131 'Purslane. Pussley.' Changed 'Purselane' to 'Purslane'. Page 131 'nearly circular, each side covered with 5-6 curved rows of tubercles, giving the appearance of having the two extremities bent together,' These two lines were reversed in original. Page 131 'in outline, hem-like margin,' Changed 'hemlike-like' to 'hem-like'. Page 134 'scar (hilum) is a whitish,' Changed 'whittish' to 'whitish'. Page 136 'Lepidium Draba' Changed 'Lepidum' to 'Lepidium'. Page 138 'slightly anatropous,' Changed 'anatroupous' to 'anatropous'. Page 138 'Agrimonia gryposepala' Changed 'cryposepala' to 'gryposepala'. Page 141 'long by 1.×1.4 mm. wide.' '1.×1.4 mm.' maybe '1.-1.4 mm.'. Unchanged. Page 142 'are half anatropous' Changed 'anathropous' to 'anatropous'. Page 144 'verticle line (raphe)' 'verticle' may be 'vertical'. Unchanged. Page 147 'ST. JOHN'S-WORT FAMILY. HYPERICACEAE.' 'HYPEPICACEAE' changed to 'HYPERICACEAE'. Page 150 'Convolvulus arvensis' Changed 'Convolvoulus' to 'Convolvulus'. Page 153 'four hard, conical-ovoid' Changed 'connical' to 'conical'. Page 153 'long, bordered by a narrow margin,' Changed 'bordred' to 'bordered'. Page 155 'convex having dark verticle lines,' 'verticle' may be 'vertical'. Unchanged. Page 156 'dull, yellowish to light brown,' 'grown' changed to 'brown'. Page 156 '.5-1 mm. long, columnar,' Changed 'colummar' to 'columnar'. Page 157 'Purslane Speedwell' Changed 'Purselane' to 'Purslane'. Page 157 'with certainty by means of' Changed 'certainity' to 'certainty'. Page 157 'oval to broadly obovate,' Changed 'obvate' to 'obovate'. Page 159 'shape, oval, oblong, rhomboidal' Changed 'rhombodial' to 'rhomboidal'. Page 164 'Chickory. Chichorium Intybus' 'Chicory' and 'Cichorium' are the generally accepted spellings today. Unchanged. Page 165 'Leptilon Canadense' Changed 'Leptiton' to 'Leptilon'. Page 165 'extremities truncate,' Changed 'extremeties' to 'extremities'. Page 167 'brown, straight or curved,' Changed 'stright' to 'straight'. Page 167 'Iva xanthiifolia' May be 'xanthifolia'. Unchanged. Page 167 'or rhombic in section,' Changed 'rhombicin' to 'rhombic in'. Page 168 'Leontodon autumnalis' Changed 'autunalis' to 'autumnalis'. Page 169 'spreading by roots-stalks' 'root-stocks' and 'roots-stalks' used interchangeably. Unchanged. Page 169 'Introduced in Europe.' May be 'Introduced from Europe.' Unchanged. Page 170 'Taraxacum Taraxacum' Changed 'Taraxacum Taraxicum' to 'Taraxacum Taraxacum'. Page 170 'faces, extending along' Changed 'exending' to 'extending'. Page 173 'ending in a prolonged tapering point.' Changed 'prolonge' to 'prolonged'. Page 175 'Clover dodder, 151' Changed '51' to '151'. Page 177 'Lithospermum,'