62 MAYFAIR NURSERIES, Box 87, Hillsdale, N. J. 
OENTHERA., Sun-Drap. (Onagraceae, Evening-Primrose Family) 
Oenothera caespitosa. Small flat rosettes or clusters of dull green, long oval leaves 
about 3 inches high. Each rosette produces several huge white cup-shaped flowers 
as much as three inches across. Only one flower opens at a time and usually lasts 
for two days. These spectacular flowers are produced in May and June. A native 
of the Dakotas that likes a sandy, well drained limy soil in full sun, (pH 7-8) The 
plants usually last only three or four years. 
Oenothera fruticosa youngii. (Sun-Drop) An attractive cump of erect stems from 12 to 
18 inches high with neat green foliage and topped with multitudes of bright yellow 
flowers in July and August. A very desirable summer blooming plant for a sunny 
spot in the rock garden or perenniaal border. Easy to grow in any ordinary garden 
soil (pH 6-8) It creeps slowly by underground runners, 
Oenothera lavendulaefolia. Neat little mounds of thin wiry stems about 6 inches -high 
with silvery-gray leaves like those of the Lavenders. It has bright yellow, broad 
petaled flowers that are almost square when they are wide open. It is in bloom 
over a long season from May to August. A native of the eastern foothills of the 
Rockies. It likes a well drained, sandy soil in full sun, (pH 7-8) 
Oenothera missouriensis. A spectacular plant from the Missouri Valley with stout trail- 
ing or ascending stems with long narrow, dull gray-green leaves which form an at- 
tractive low and broad mound about 5 inches high. The very large, clear yellow 
flowers are about 3 or 4 inches across and open in the afternoon or early evening 
during June and July. It is one of the best wall plants. It likes a rather dry, well 
drained sandy lime soil in full sun. (pH 7-8) 
Courtesy American Rock Garden Society 
Oenothera caespitosa 
Oenothera serrulata. Wiry stems about 6 inches high that make dense clumps with its 
tiny bright green leaves. It has quite large bright yellow, wavy petaled flowers in 
June and July. A very pleasing little plant for the rock garden or wall garden. 
Another native of the Dakotas that tikes a well drained, sandy lime soil in full sun. 
(pH 7-8) 
Oenothera triloba. Large clumps of long green leaves that look like robust dandelions 
with large bright yellow flowers nestled among the leaves. You have to get up 
early to appreciate the attractive flowers of this one. The flowers open after dark 
in the evening and close about 9 in the morning. It is easy to grow in a well drained 
garden soil in full sun. (pH 6-8) 
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