306 
THE FLOWER GARDEN. 
Nuphar (Yellow Water Lily). — Hardy aquatic perennials, 
belonging to the Water Lily order (Nymphaeaceae). N. luteum 
is the native Water Lily often met with growing in ponds and 
water-courses. It bears yellow fragrant flowers in July and 
August. N. pumilum is a small native kind met with in 
Highland lakes. N. advena is a N. American species with 
yellow flowers and red stamens. These lilies require to be 
grown under similar conditions to the Nymphasas, which see. 
Orontium (Golden Club). — The only species is O. 
aquaticum, a N. American hardy aquatic perennial, belonging 
to the Arum Lily order (Aroideae). It grows a foot or so 
high, and bears yellow flowers on a club-like spadix or stem 
in May and June. The leaves float on the surface of the water. 
This interesting plant is suitable for growing on the muddy 
margins of ponds where the water is shallow, or in moist bogs. 
The best time to plant is April. Increased by division of the 
rhizomes in spring. 
Parnassia (Grass of Parnassus). — P. palustris is a 
native bog plant, growing bin. high, and bearing a profusion 
of pretty white flowers in summer. It belongs to the Saxifrage 
family (Saxifragaceas). An interesting genus to grow in moist 
shady positions, as in the bog garden or on the margin of 
water. In any case a peaty soil is essential. Plant in spring. 
Increased by seeds sown in spring where required to grow, or 
by division in autumn or spring. 
Peltandra (Arrow Arum). — P. virginica is a North 
American marsh plant, belonging to the Arum family (Aro- 
ideae), suitable for growing on the margins of ponds or lakes. 
Its chief attraction is its arrow-shaped and prettily netted 
leaves. It grows 2 to 3ft. high. Plant the creeping root-stocks 
in the mud at the margin of the water in spring. Increased by 
division in spring. 
Pontederia (Pickerel Weed). — P. cordata is a North 
American aquatic perennial with elegant foliage, growing 1 to 
3ft. high, and bearing sky-blue flowers in dense racemes 
during the summer. It is a very handsome and graceful plant 
and should be grown in every collection of water plants. This 
plant will succeed on the muddy margins of lakes or ponds in 
shallow water about a foot deep. Plant in spring. Increased 
by division in April. Nat. Ord. Pontederiacese. 
Richardia (Arum Lily).— R. africana (Syn. A. afri- 
cana) is better known as a greenhouse than a hardy plant. 
It is, however, hardy enough to grow outdoors in the South 
of England, and on that account must have a place in this 
