THE ODOUR OF MUSK. 21 
many flowers which are scentless by day and smell powerfully at 
night. Linnzeus calls them “ Flores tristes,’ melancholy tlowers, 
belonging to various tribes as discordant as possible ; the colour of 
such flowers is generally white, pale yellow, greenish yellow, dull 
brown, or faded blue-tint. Amongst them may be noticed :— 
Hesperis tristis, the double-flowered night-scented Rocket. 
Cheiranthus tristis, the night-flowering Stock. 
Daphne pontica. 
Crassula odoratissima. 
Mirabilis jalapa. 
3 dichotoma, 
Y: longiflora. 
Datura ceratocaula. 
Cereus nicticalus. 
»  serpentinus. 
» grandiflora, which puts forth a bloom as large as a 
caulitlower, smelling powerfully of vanilla. 
Rivea Bona-nox (Lettsomia Bona-nox). 
Ipomea grandiflora. 
Nyctanthes arbor-tristis. 
Geranium triste. 
Sanseviera Pumila, 
