1869.] Memarks on the species of Pandanus. 147 



P. ovatus (Fisquetia ovata, Gaud., loc. c, t. 4, fig. 1,) seems to 

 belong to this section. 



** Stigmata secedentia, (i. e. imd basi fragilia.) 



4. P. ornatUS, {Fisquetia ornata, Gaud., loc. c, t. 5, fig. 1, 8 et 

 9 ; et F. militaris, Grand., ib. f. 2-7.) 



I would have united this species with my P. helicopus, but Gfaudi- 

 chaud's plant has the peduncle below the syncarpe straight, while 

 P. helicopus, in a young stage has it always spirally twisted, becom- 

 ing afterwards lengthened and pendulous ; also the serrature of the 

 leaves are in Gaudichaucl's figure much sharper. 



5. S. helicopns. Kurz, loc c, p. 101. 



Of this species the male flowers are still unknown, and it is doubt- 

 ful, therefore, whether it should be placed in Acrostigma, or rather 

 ' form a distinct subsection of Rychia. 



Sect. II. Ryckia. Drupae simplices ; stigmata introrsum vergen- 

 tes, secedentia, spinescentia, saepissime furcata, strictiuscula, v. a 

 dorso depressa ; filamenta racemosa, v. palmatim connata ; antherae 

 aristatae, v. apiculatae ; ovula solitaria. (Barrotia, Gaud, ex parte.) 



* Stigmata brevia, a, dorso piano depressa, spinescentia, hi- rarius 

 tri- furcata v. simplicia, ossea. 



6. P. furcatUS, Rxb., Kurz, loc. c, p. 102. 



Barrotia diodon, Graud., loc. c, t. 8, fig. 9-14, apparently belongs to 

 this species, but Barrotia monodon, ejuscl., loc. c, fig. 14-25, can with 

 equal probability represent very young drupes of P. furcatus, or full 

 grown ones of the two following species. 



7. P. labyrintliicus, Kurz, loc. c, p. 103. 



8. P. nitiduS, Kurz, loc. c, p. 103. 



** Stigmata hrevissima, a dorso oolique depressa, marginibus rotun- 

 datis v. crenulatis. 



9. P. graminifbliUS, Kurz, loc. c. 104. 



10. P. CeramiCUS, Rumph., Kurz, loc. c. 104. 



Sect. III. Keura. Drupae in phalanges connatae, raro una 

 alterave simplice intermixtae ; stigmata sessilia, v. sub-sessilia, peltata, 

 v. reniformia ; filamenta connata ; antherae aristatae ; ovula solitaria, 

 (Kurz loc. c, cum syn. ; Tucheya, Gaud. ; Vinsonia, Gaud. ; Barrotia, 



