462 OBSERVATIONS ON PLANTS, 



CORCHORUS ALLENII. 



Branchlets thinly beset with stellular hairlets ; leaves on very 

 short petioles, narrow- or elongate-lanceolate, without any con- 

 spicuous denticulation, on both sides provided with a subtle 

 stellular greyish indument ; stipules very short, fugacious ; pedi- 

 cels comparatively short ; flowers very small, solitary ; calyx 

 tubular and undivided towards the base ; fruit ovate-ellipsoid, 

 five-celled, densely beset with short soft flexuous stellular-hispi- 

 dulous bristlets ; seeds about four in each cell. 



Near Prince Regent's River ; Bradshaw and Allen. 



Leaves 2-3 inches long, J-J inch broad. Good flowers not 

 obtained. Petals seen in a shrivelled state, and seemingly only 

 J inch long. Fruit about § inch long, its setules somewhat 

 flattened, forming a dense grey vestiture, the uppermost of them 

 often slightly dilated and then constituting a rather distinct 

 termination to the fruit. Seeds brown outside, glabrous. 



Although the fruit-setules are somewhat similar to those of 

 Triumfetta Bradshawii, yet the plant falls systematically into 

 Corchorus, no absolute differences existing between the two 

 genera. It approaches in some respects C. echinatus, in others 

 C. hirsutus, but as regards the characteristics of the fruit-indu- 

 ment, this species stands quite apart among its known congeners, 

 except C. Elderi ; but that has the leaves much smaller and 

 distinctly denticulated, the fruits also of much lesser size, with 

 shorter setules, the seeds fewer and of course smaller. 



Grewia polygama, Roxburgh. 

 Carson River. 



Petalostigma quadriloculare, F.v.M. 



Prince Regent's River. KnoM'n now also from Wickliffe's Creek 

 in Central Australia (Flint). 



Sebastiania chamaelea, J. Mueller. 

 Prince Regent's River. 



