. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. ON AQUATIC PLANTS. 921 to succeed in flowering this species under artificial treatment, the plants should be allowed to become crowded and the roots well matted together. They should be located in the sunniest position in shallow water with a little soil for them to root in, and the offsets (which are freely produced) should be removed as soon as they appear. This pretty plant has been introduced from its native habitat (South America) to some of the water- courses in the United States, and in the St. John's River, F
. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. ON AQUATIC PLANTS. 921 to succeed in flowering this species under artificial treatment, the plants should be allowed to become crowded and the roots well matted together. They should be located in the sunniest position in shallow water with a little soil for them to root in, and the offsets (which are freely produced) should be removed as soon as they appear. This pretty plant has been introduced from its native habitat (South America) to some of the water- courses in the United States, and in the St. John's River, Florida, it has increased to such an extent as to become a serious obstruction to navigation. Herpestis Monnieria is a small but dense-growing plant of prostrate habit. The small, solitary, bluish flowers are freely produced, and are arranged in the axils of the leaves. It is a very serviceable subject for covering the bare surface of wet soil in which tall, erect-growing plants are situated. Hydrocleys COiMMERSONi {^Limnocliaris Humboldtii^ Poppy), is a very desirable and handsome Aquatic, with pale, yellow flowers, deepening in tone of colour towards the base of the petals ; the numerous stamens are purplish, which add to the beauty of the flowers. They are very fugacious, but the freedom with which they are produced amply atones for that deficiency. It is a free-growing plant of neat habit, with floating, roundish ovate-shaped leaves, the mid-rib of which is very prominent on the under-side. Water- large, Hydrolea spinosa (Fig. 610) is an erect-growing, free-flowering plant, producing corymbose panicles of rich, clear, blue flowers. It is of easy culture and compact in habit. Seeds so\vn in the early spring will produce flowering plants late m the season. Height ift. to 2ft. Jussieua repens grandiflora has shortly-stalked five-petalled flowers of a rich deep yellow. The plant is of vigorous growth, with long, prostrate floating stems, from the joints of which erect-growing, f
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