This section is from the book "A Dictionary Of Modern Gardening", by George William Johnson, David Landreth. Also available from Amazon: The Winter Harvest Handbook: Year Round Vegetable Production Using Deep Organic Techniques and Unheated Greenhouses.
Perennials. CE. Speciosa, white. OE. Macrocarpa, yellow. CE. Taraxacifolia, white. CE. Glauca, yellow. CE. Serotina, yellow.
Annuals. CE. Rubicunda, pink. CE. Lindleyana, purplish-rose. CE. Tenuifolia, purple. CE. Tetraptera, white. CE. Odorata, yellow. CE. Romanzovii, blue.
CEnothera Drummondii, is a fine large yellow sort, and very ornamental, but it is tender, and requires the same treatment as petunias and verbenas. - Card. Chron.
CE. serotina, is a beautiful autumn flower, and its culture is thus recommended: - "The bed should be looked over every morning, and the flowers of the previous day carried off. This will very considerably add to its beauty. Where a quantity of it is wanted for bedding, May is the fit time to attend to its propagation, by preparing cuttings (as soon as the young wood has 26 advanced to the length of one and a half or two inches), pricking them out in sand, in the open ground, and covering them with a hand-glass. If treated in this manner, the whole of the cuttings may be expected to root, and be ready for planting out in a month; whereas, if deferred until the autumn, when the increase of flower-garden stock is considered en masse, the probability is that not one will succeed." - Gard. Chron.
This mode of culture is applicable to all the perennial species.
 
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