356 THE JOURNAL OF BOTANY 



{Dianthera dichotoma Clarke), and Diantliera terminalis Fawc. 

 Other Indian species referred to Diantliera^ however, he did not 

 claim for his genus ; their inclusion in Leda together with other 

 Indian species that Clarke had placed in Diantliera in his earlier 

 work (Fl. Brit. Ind. iv. 542) was left to the last named. 



We are not 3^et at the end of the matter. In Thwaites's Enum. 

 Plant. Zeyl. (p. 340) T. Anderson proposed his genus Ptyssiglottis 

 for the reception of Rliytiglossa radicosa Nees. This not very Avell 

 known plant is represented both at the British Museum and at Kew 

 by unsatisfactory material ; but when one comj^ares Beddome's 

 figure (Ic. Plant. Ind. Or. tab. cclxvii.) with some of the quondam 

 Diantheras, it seems necessary to regard I'tyssigJottis as the proper 

 receptacle for these plants, seeing that, besides identical struc- 

 tural characters, the pollen, as shown in a drawing at Kew, is pre- 

 cisely that of the Ledas. The twelve species thus included in 

 Ptyssiglottis it is proposed to divide into two sections according to 

 whether the inflorescences are made up of pedicelled or of sessile 

 flowers. The anther-cells may also be used to a certain extent : in 

 some species these cells stand nearly at equal height (occasionally 

 they are quite level), in others there is a marked inequality in their 

 position ; but the transition from one condition to the extreme of the 

 other is so gradual, as we proceed from species to species, that there 

 seems no reason for generic separation, even if a satisfactor}"" cleavage- 

 point could be discovered. 



The following is a key to the species : — 



Sect. EuRTANTHE-E. Flowers in open panicles, 

 each on a distinct pedicel. 

 Anther-cells level or almost so. 



Leaves obtuse. Inflorescence short, 1-4- 



flowered P. radicosa T. And. 



Leaves acuminate. Inflorescence several- 

 flowered, [comb. nov. 



Corolla widened above, 15 mm. long ... P. suhcordata. 



Corolla cylindrical, 10 mm. long P. dichotoma, 



One anther-cell distinctly below the other. [comb. nov. 



Corolla 20 mm. long P. collina, comb. nov. 



Corolla 10 mm. long. Connective [comb. nov. 



between the anthers broad P. terminalis, 



Corolla 8 mm. long. Connective fill- [sp. nov. 



form P. Zollinger ii, 



Sect. II. Spicatjd. Flowers sessile, in spicate 

 panicles. 

 Leaves 8 cm. broad, narrowed into the 



petiole. Inflorescence 20 X 2 cm P. ohovata, comb. nov. 



Leaves up to 6 cm. broad, rounded at base. [sp. nov. 



Inflorescence at least 6 cm. broad P. tonhinensis, 



Leaves up to 5 cm. broad, obtuse or 

 rounded at base. 

 Leaves caudate-acuminate, rounded at 



base P. dehilis, comb. nov. 



