E 
y F 
XIX. Contributions to the Natural History of the: Passifloraceæ. By M. T. MASTERS, 
Esq., MD., F.R.S., L.S., fc. 
Read November 17th, 1870. 
(Plates LXIV. & LXV.) 
CoNTENTS. 
Organography. Movements of the reproductive organs &c. 
Germination. Affinities of the group, and mode of estimating the 
Development of the leaf, tendril, bracts, flower, . value of characters in general. 
&c. Remarks on the genera of Passifloracee. 
Teratology. Enumeration of the genera and species of the 
General remarks on the Morphology of the flower tribe Passifloree, Benth. et Hook. 
in Passiflora. Geographical Distribution. 
Minute Anatomy of the several organs. ; Select Bibliography. 
Fertilization of the flower. 
IN studying the species of the order Passifloracee with the view of describing those 
members of the group which are natives either of tropical America or of tropical Africa, 
I have necessarily passed in review the great majority of the hitherto described forms. 
The technical descriptions of these species will be found in a future part of the * Flora 
Brasiliensis’ (inaugurated by the late Von Martius, and continued under the superin- 
tendence of Dr. Eichler), and in the second volume of the ‘Flora of Tropical Africa ' 
(drawn up by my friend Professor Oliver)*. 
In this place I propose, with the permission of the Society, to place on record some 
remarks of a general character, which may serve to illustrate the natural history of the 
group. In order the better to illustrate the morphology and affinities of the group, I 
take the order Passifloracee as it stands in Bentham and Hooker's ‘Genera Plantarum”+, 
though, for reasons hereafter to be assigned, I should prefer to remove the tribes Modeccez, 
Achariee, and Papayacee from Passifloraceæ proper. | | 
My remarks have reference to the outward conformation, the internal structure, the 
mode of development, and the physiological history of certain selected representatives of 
the order in question. In commenting on the affinities of the group, 1 shall introduce 
some general considerations on the nature and value of the evidence upon which species, 
genera, orders, &c. are founded and arranged. 1 also subjoin a list of the species of Pas- 
sifloracec proper, together with some remarks on their geographical distribution. Owing 
to the kindness of my friends and fellow workers I have been enabled to examine all the 
specimens of the order Passifloraceæ belonging to the collections at Kew, the British 
Museum, to the herbaria of Munich, Berlin, and Paris, those contained in the herbaria 
of the late Von Martius, as well as in many collections of less magnitude. Moreover 
~ = Both these works are passing through the press (May 1871). + VoL i. p. 808. 
