DENDROBIUM. 173 



orange ; the lip bright yellow, with two dark spots on the 

 upper part. It blooms during the autumn months, lasts two 

 weeks in good condition, and requires the same treatment as 

 D . formosum. 



D. Griffithianum. — This is certainly one of the most glorious 

 of the yellow spring-flowering Dendrobes ; it is about double 

 the size of D. densiflorum in all its parts, and its immense 

 drooping spikes of bloom are of the richest golden yellow, 

 and remain in perfection for a long time. This plant is very 

 rare, and varieties are often sold for it which are much inferior 

 to the true plant. 



D. Guihertianum. — In habit of growth this plant resembles 

 a strong densiflorum, or perhaps Farmerii ; it produces spikes 

 fourteen inches long, of a very rich golden yellow. 



D, Heyneanum. — A charming deciduous species from 

 Bombay, which grows eight inches high, and produces spikes 

 of white flowers from the tops of the stems at difierent times 

 of the year ; they have somewhat the appearance of sprigs of 

 whitethorn. It is best grown on a block, with a moderate 

 supply of moisture, during the growing season. It continues 

 about ten days in perfection. 



D. hedyosmum. — This beautiful sweet-scented Orchid is 

 another of the many fine plants we have received from Moul- 

 mein. It is a plant of remarkably easy culture, producing 

 its blossoms in spring. Its flowers, when first opening, are 

 green or greenish white, but after a day or so they change to 

 pure white, except the lip, which is shaded with green and 

 yellow, and striped with orange. They are produced in pairs, 

 and yield a delicious perfume similar to that of wallflowers. 

 It belongs to the D. formosum section of the genus, which 

 have the young growths covered with black hairs. 



D. Hum. — This is an Australian species, nearly related to 

 the oldD. speciosum, but the stems are fully twice the length. 



