lets. Colour a dark vinoiis-rcd, bocomiiig brighter after steeping in fresh- 

 water. 'V\\Q,favelke arc borne on minute, hitoral pedicels, and occur solitary 

 or in pairs, each surrounded by a circle of incurved, eallithamnioid, simple 

 involucral raracUi. Telrafsport's are borne on minute, lateral, much branched, 

 dichotomous, eallithamnioid ranicUi. The ««6.s'/«?2ce is coriaceo-eartilaginous 

 and rather rigid, and the frond very imperfectly adheres to paper in drying ; 

 the full-grown does not adhere. 



In general aspect and ramification this plant bears a close re- 

 semblance to P. curalloidea, but it is not only a perfectly distinct 

 species, but if the internal structure of the stem were strictly 

 attended to, it might even be referred to a ditFerent genus ! In 

 P. coraUoidea, a cross cutting of the main rachis shows a very 

 large axile tube, flanked on each side with two large lateral tubes, 

 and surrounded by lax tissue, among which minor cavities are 

 dispersed. In our P. Jeannerettii, on the contrary, there is a 

 small axile filament, surrounded by a circle of interwoven longi- 

 tudinal minute filaments, and through the rather dense cellular 

 tissue that surrounds this centre are dispersed numerous cavities 

 or tubes ; a structure somewhat intermediate between that of 

 P. rhodocalHs and P. striata ; and not typically different from 

 the plant I have elsewhere figured under the name "Pikea Cali- 

 fornica'' a plant which future observation may show to be an 

 anomalous Ptilota. 



Fig. 1. Ptilota Jeannekettii, — the. natural size. 2. Apex of a ramulus, with 

 favellce. 3. A favella and two of its involucral ramuli. 4. Apex with 

 tufts bearing tetrasporcs. 5. Portion of one of the tufted ramelli, with te- 

 traspores : — variously magnified. 



