PHANEROGAMS — PROFESSOR BAYLEY BALFOUR. 165 



I have indicated are rare, but there are many differing from that which must 

 be the normal type. These are commonly borne at the extremity of an 

 elongated twig or, at least, internode, and are readily observed, being twice the 

 size of the normal flower. In some of them the calyx may be normal, and the 

 corolla has a slightly dilated tube, constricted at the throat, where it is girt by 

 a thickened and pubescent ring, and the segments of its limb are long and leaf- 

 like ; the corona scales are subulate, slightly inserted into the corolla tube 

 above the oral constriction, exserted, and attain a length of a quarter of that of 

 the limb of the corolla ; there are no stamens, and in the centre of the flower 

 is a pistil slightly compressed, and adherent to the corolla tube, thinning 

 upwards into a sort of beak distinctly bilobed at the apex. But there are 

 more extreme cases than that. In some flowers there is phyllody of all parts. 

 We find a calyx, cup-shaped at base, with more or less green leafy lobes, a 

 corolla of five leafy lobes, and rising from inside of it, and alternating with its 

 lobes, five similar leaf-like bodies, which I assume represent the corona scales ; 

 in the centre is a couple of leaves connate at the base, and enclosing a cavity, 

 and these I take to represent the carpels, and between them are visible two 

 small processes which may be additional leaves on the axis. It appears, then, 

 we have complete phyllody with suppression of the andrcecium. The five 

 processes within the corolla lobes I take to be corona scales, for they occupy 

 the position of these in the half-phyllodied flower. It is commonly accepted 

 that the corona in Asclepiads is an emergence, so that in this instance we have 

 emergences becoming themselves foliar. I know of no recorded instance of 

 this in any other plant. In the Appendix I again refer to this subject. 



2. MITOLEPIS. 



Mitolepis, Balf. fil. in Proc. Roy. Soc. Edin. xii. (1883), 78. 



Calyx 5-partitus, glandulosus, segmentis oblongis. obtusis. Corolla eampanulata, tubo brevi, 

 lobis angustis linearibus obtusis contortis dextrorsum obtegentibus. Coronae squamae 5, 

 basi fusifornies, apice fili formes, medio tubo corollae affixae qua paulum breviores. Stamina 

 prope basin tubi affixa, filamentis liberis ; antherae erectae, basi stigmati adbaerentes, apice 

 couniventes, acutae, liberae, dorso glabrae. Pollen granulosum appendicibus oblongo- 

 ellipticis corpusculorum applicitum. Stigma depresso-conicum medio 2-lobum. Eolliculi 

 divaricati teretes striati subtiliter puberuli. Semina comosa. — Frutex erectus multi- 

 ramosus. Folia opposita fasciculata linearia. Flores solitarii breviter pedicellati. 



A monotypic genus of Periplocece, having the corona scales attached to the 

 corolla tube. It is thus a neighbour of such genera of shrubby habit as 

 Curroria, JEchmolepis, Ectadiopsis, and Ectadium. But there are characters 

 which prevent our plant being included in any one of these genera. Thus 

 Curroria, a south African ditypic genus, is distinguished by the connate 

 filaments of the stamens and by its orbicular appendages to the corpuscles. 



