From George Bentham   18 October 1874

25, WILTON PLACE. S.W.

London

Oct 18 /74

My dear Sir

I write chiefly to express my sincere regret that I am unable just yet to set about the 7th & last vol of my Flora.¹ I find it necessary first to complete the new part of our Genera and this takes me longer than I expected I have had to remodel not only the tribes but many of the genera of Apocyneae Asclepiadeae and Gentianeae and the detailed examination of the Asclepiadeae especially has been very long and tedious. I shall now proceed more rapidly as the subsequent Orders have been more recently and in general more satisfactorily worked I have also been twice absent — once for a month in spring to attend the meeting at Florence and again for nearly a fortnight in August for the British Association meeting at Belfast² Otherwise I have steadily worked on for eight hours a day and hope to continue through the winter — and to allow nothing but this part of the Genera to interfere with the completion of the Flora.

The Kew garden authorities have agreed to prepay the return cases of your plants of which you had prepaid the carriage out³

There will be no occasion to change the name of Browns Baxteria⁴ Harrisonia Hook to which Reichenbach gives that name is absolutely congeneric with the American urceolate Marsdenias In this genus there is a very gradual passage from the rotate to the campanulate urceolate and hypocrateriform corolla no definite line indeed can be drawn between Marsdenia and Stephanotis and I am obliged to draw a purely artificial and arbitrary line of distinction amongst the American especially the Cuban species — Harrisonia remains in Marsdenia⁵

The bracteal homology of the glumes and paleae of Gramineae has long been recognised by the majority of botanists and it is now many years since I advocated the necessity of so far modifying the terminology as to give the name of glume to those which are on the axis of the spikelet including the outer palea of most botanists and to limit the term palea to the so called inner palea which is on the axis of the flower I carried out this terminology in my British Handbook and in the Flora Hongkongensis and Hooker has fully adopted it in his Student's Flora and in the 2d edition of Harvey's Cape genera⁶ — Other botanists still stick to the old way of calling the outer empty glumes sometimes glumes sometimes barren flowers and the flowering glumes sometimes outer paleae sometimes barren flowers, so as often to occasion much confusion especially in the panicoid genera. Several continental botanists have however taken a correct view of the relative homologies of these organs.⁷

I remain

my dear Sir

Yours very sincerely

George Bentham

Baron F. von Mueller

Apocyneae

Asclepiadeae

Gentianeae

Baxteria

Harrisonia

Marsdenia

Stephanotis