281 
interest are Hibiscus Watsoni from Upper Burma, a species with 
large spikes of yellow flowers, buried in a mass of long linear bracts, 
a yellow Gentiana (G. stylophora) with corollas 5-6 em. long and 
6-7 cm, wide, from Sikkim and Yunnan, an almost completely 
isolated type, and Chilocarpus anguineus from Sarawak, remarkable 
on account of its long, vermiform fruits, whilst Pogostemon Rogersii 
attracts our attention owing to its being the first species of the genus 
recorded from Africa and Pardenia sokotensis as a curious link 
between the flora of Nigeria and Madagascar, no close ally being 
known so far from the African continent. Economically important 
are Boswellia odorata, a resin tree from Northern Nigeria, only 
known in the cultivated state, Parthenium argentatum, the Mexican 
rubber plant known as ‘ Guayule,’ and Styrax benzoides, the source 
of the commercial Siam Benzoin or, perhaps better, one of the 
products known commercially as Siam Benzoin. 
QO. §. 
Botanical Magazine for August.—The plants figured are Stanhopea 
convoluta, Rolfe (t. 8507) ; Centaurea crassifolia, Bertol. (t. 8508) ; 
Cytisus supranubius, O. Kuntze (t. 8509); Grevillea bipinnatifida, 
K. Brit 10); and Solenostemon Godefroyae, N. E. Brown 
(t. 8511). 
The Siiaise is most nearly allied to S. trécornis, Lindl., but it 
has larger flowers and differs in the structure of the lip. It was 
gs 
Garden in 1909, 
