26 



day. ( >f the fulvous daylilies, he knew only the one clon then 

 in cultivation, and for a time he considered it a hybrid, but later 

 he gave it specific rank under the name Hemerocallis fulva 

 i Species Plantarum, 1762). 



Thus the habit of diurnal flowering observed for the "Gold 

 \<a\ Daylily" in cultivation is responsible for the generic name 

 Hemerocallis and for the common name "daylily" as applied to 

 this group of plants. 



Figure i. Flowers <>f Hemerocallis citrina arc nocturnal. They open 

 shortly before sunset, are fully oi.en during the night, and close early 

 the nexl afternoon ( as shown here), unless the day is cool. 



Soon after the introduction into Italy about [897 of the species 

 which was named //. citrina, it was recognized that its flowers 

 are night-blooming. A Japanese book, the Somoku-Dzusetsu 

 (second edition, [874) had already described, incorrectly, under 

 the name //. Dumortierii, a daylily whose llowers open in the 

 evening and close early in the following forenoon. Later, in 

 the third edition of this book, the name for this daylily was 



