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WATER HYACINTHS. A SINGLE PLANT EIGHT WEEKS AFTER IT APPEARED ABOVE THE WATER. JUNE, 1915.
WATER HYACINTHS. PLANTS EIGHT WEEKS OLD NEAR THE MOUTH OF THE OBISPO RIVER.
WATER HYACINTHS. PLANTS FOUR WEEKS OLD NEAR THE MOUTH OF THE OBISPO RIVER.
PLATE 61.