334 TRANSACTIONS AND PROCEEDINGS OF TlIK [Skss. lxiv. 



I have had opportunities of examining sixty-five species, 

 inehiding twenty of those examined by Dickson. Some of 

 tliese fit into Dickson's three types, but the remainder 

 form three new types of arrangement, which I number 

 4, 5, and G respectively. 



Type 4 (Fig. 4) has twenty-five stamens in five 

 festoons of four, and five solitary oppositipetalous. 



Type 5 (Fig. 5), with twenty stamens arranged in 

 five festoons of four each. 



Type G (Fig. G), witli fifteen stamens arranged in. 

 five festoons of three each. 



In the following Jist is indicated the type of staminal 

 arrangement in each species examined. The number in 

 front of each species is that in Lehmann's " Eevisio."' 

 The list contains all those I have examined, with the 

 exception of those previously described by Dickson 

 (" Trans. Bot. Soc," Ice. cit.), and some that were doubtful. 

 It is interesting to note here that my specimens of 

 r. ritpcstris, L., showed the arangement in Type 5, while- 

 that of Dickson exhibited his Type 3. 



29. P. Ornithopoda, Tausch. — I. 106. P. canescens, Bess. — I. 



32. P. Verticillaris, Steph.~l\'. lOS. P. intenuedia, L.— I. 



oS. P. rupt'Stris, L. — V. 109. P. moUissima, I.ehin.— VI. 



60. P. bipinnatifida. Dong].— IV. 112. P. Detomasii. Ten.— III. 



60. P. AgT'imonioides, M.B. — I. 116. P. kurdica, Boiss. — I. 

 60. P. Araclinoidea. Dougl. — IV. P. salisburgensif!. — I. 



64. P. Chinensis, Sen— 1. | 138. P. pilosa, VVilld.— IV. 



P. Drnmmondii. — IV. P. alcheniilloides. — I. 



69. P. approxiniata, Bge. — IV. 153. P. Catliaclines, Lebm. — 1\'. 

 89. P. Kotsebyana, Fenzb— III. P. iiisigne.— I. 



91. P. laciniosa, AV.K.— IV. 172. P. Hookeriana, Lebm. -I\'. 

 P. electa.— II. 199. P. Norvegica, L.— VI. 



92. P. IjEta, Jicbb.— IV\ P. Schronkiana, Rgb— H'. 

 P. pedata. — I. j P. Iberica, Hort. Pars. — i. 



96. P. desertoruin. Bnge. — I. I P. Oiitopoda, Doiigl. — I. 



101. P. Fenzbi. Lehin. — I. I P. Buccoana, Clem. — I. 



105. P. Collina, Wib.— I. | P. Macuabiana.— I. 



JJickson describes the development of the festoons as- 

 centripetal, i.e. the terminal lobe of the compound 

 stamens — the petal — appears first, then the lateral lobes 

 in basipetal order on either side. The oppositipetalous 

 stamen, when present, develops late, lie figures this con- 

 dition in P. fndicosa ("Trans. Bot. Soc," loc. eit., Fig. 5) 

 whicli has Type 3 staminal arrangement. In contrast to 



