ON THE GENUS BRYOCARPUM. 199 



illustrious Brown in referring Delabechea to Brachychiton (conf. App. to 

 Sturt's c Central Australia/ ii. p. 66), but leave it intact, according to Pro- 

 fessor Lindley, between Br achy chiton and Sterculia. This tree, I may 

 mention, varies with digitate leaves, which indeed seem to be the typical 

 ones, and simple leaves, nor does it but in very rare instances assume 

 that degree of turgidity of its stem which the woodcut in Mitchell's 

 Trop. Austr. represents. Brachychiton populneum may occasionally, 

 when growing out of the fissures of granite rocks, be seen assuming the 

 same extraordinary form. Yet Delabechea is always perceptibly con- 

 tracted at the bottom and summit of its stems, more so than other 

 Sterculia with which I am acquainted. 



I cannot conclude this review of Australian Sterculiacece without allud- 

 ing to a species of Brachychiton (if not Delabechea) originally discovered 

 by Mr. A. C. Gregory in his exploration of the northern parts of Western 

 Australia. He fouhd the tree as early as 1848 on the Murchison River, 

 when discovering the Yaraldine lead-mine : it attracted his attention 

 as being the only deciduous tree of Westefn Australia, and fruit speci- 

 mens were at the time communicated to Mr. Drummond.* 



{To be continued.) 



On Bryocarpum, a netc genus of Himalayan Primulace^e; by J. D. 

 Hooker, M.D., F.R.S., and T. Thomson, M.D., F.K.S. (With a 

 Plate, Tab. V.) 



The remarkable plant now described is very closely allied to Solda- 

 nella, but differs from that genus in colour of the flower, in the narrower 

 tube of the seven-lobed corolla, whose lobes are obtusely bifid and not 

 laciniate, in the seven stamens inserted at the top of the tube of the 

 corolla, and in the absence of scales at the throat of the latter. 



* According to Mr. Gregory's information, whose name ought in justice to b« 

 attached to this species, it forms a tree 10-20' high, with slightly rough bark, thin, 

 palmate. Beyond the middle five-cleft leaves, which are shining above, glabrous, and 

 about 4" long', lobes acute, leafstalk about 2" long. Flowers small, greenish-yellow, 

 in bunches. "Follicles sometimes as many as 30 or 40 conjoined, 2" long, outside 

 smooth, twice as long as their stalk, thinly coriaceous, like in Delabechea. Seeds 

 12-15, smaller than in Mitchell's Bottle-tree, imbedded iu the follicle and scarcely 

 hairy. The stem is cylindrical ; the branches are whorlcd and form a hemispherical 

 head- It is the only Western Australian Stereuliaceous tree. 



