JOURNAL OF DAVID DOUGLAS 93 
Capsella, showing more or less incomplete development of the 
capsule, probably covers plants of diverse origin; some showing 
non-development owing to climatic conditions, and others in 
which loss of fertility is due to hybridity. I hesitate to so 
distinguish any example I send for distribution, but I have reason 
to believe that C. gracilis often represents C. agrestis x C. Bursa- 
pastoris var. bifida. I have several examples that I so name.’ 
Journal kept by David Douglas during his Travels in North 
America, 1823-1827 : together with a particular description 
of thirty-three species of American Oaks and eighteen species 
of Pinus, with appendices containing a List of the Plants 
introduced by Douglas and an account of his death in 1834. 
Published under the direction of the Royal Horticultural 
Society. London: Wesley. Demy 8vo, cloth, pp. 364. 
THE information given as above on the title-page echios 2 
a 
the volume is “For Review One Guinea net”) of the book 
utchinson is also responsible for the references to the 
Index Kewensis, and here there is cause for complaint. As we — 
