Plate 2370. 



ACHILUS SIAMENSIS, H^md. 



SciTAMiNE.E. Tribe Zixgibkre^. 



Achilus, TTemsL in Kew Bulletin, 1895, 39. Florcs niinuti, in 



axillis bracteolarum solitarii, sessiles, unisexuales, ut videtur, voro 



monolci. Flores ^ : Calyx cylindrico-tubulosus, obscure trilobritua. 



Corolla calyccm dimidio superans, alte trilobata, lobis ovato-oblongls 



obtusis. Staminodia nulla. Stamen unicum ; filamentum filifoi'uie ; 



anthera? exsertse loculi paralleli, contigui, connectivo non producto 



mappendiculato. Flores ? : Calyx tubulosus, cylindricus, brcvissinio 



3-lobatus, Corolla cylindrica, calycem paullo superans, etiam obscure 



trilobata. S taminodia nviW^i,. Stylodia 2^ ^liiormViX, ovarium 1-loculare, 



placentis parietalibus, ovulis numerosis ; stylus filiforrais. Fructus 

 ignotus. 



Herba annita^ nana, gracilis, caulihis simplicihus, ¥o\\^ gramin- 

 oidea, Inflorescentia terininalis, nutans, e spicis ]mucis, densis^ 

 distantibics, graciliter peduncidatis sistens, et bracteis amplis coloratis 

 oniatce, Flores hracteolis distichis arete compltcatis etiam coloratis fere 

 occultiy inferiores ? , stij^rermis vel sjiperiores c? . 



^ Achilus siainensi=!, Ilemsl. I.e. ; puberula caulibus 2-3-foliatis, foliis 

 distichis longe vaginantibus, vaglnis apertis ciliolatis apice transversim 

 breviter ligulatis, lamina lineari-Ianceolata acutissima atque vagina 

 niultinervia supra vix hispidula, bracteis sessilibusovali-oblongiscrebre 

 longitudinaliter venosis venis prope marginem connexis, bracteolis 

 rotundatis latioribus quam longis, floribus papillosis, ovario ruguloso. 



Hab. Siam : open places on Mount Putsum, near Xam Kawng, at 

 about 2000 feet, F. H. Smiles. 



Caules 6-9 poll alti. Folia absque vagina H-2 poll. longa. Li- 

 Jlorescentia 1^-2 poll, longa. Bractem 6-9 lin. long^e. Bracteolce ex- 

 teriores complicatt^e circiter 3 lin. diametro. Flores 3-4 lin. loiigi. 



This is the new genus alluded to (' Bulletin,' Ic.) as forming part of 

 a small collection from Upper Siam, collected by Mr. F. PI. Smiles, of 

 the Royal Ordnance Survey. From his note accompanying the speci- 

 niens, it would appear that the bracts and bracteoles are of a dark 

 purple-red and the very small cylindrical Howers yellow ; but he, not 

 t»eing a botanist, did not correctly discriminate between the bracts and 

 ihe flowers. Achilus is remarkable in having unisexual flowers and also 

 from the total absence of labellum and of staminodia of any kind.— "W. 



^' Hemsley, 



Fig. 1. Detached lower portion of inflorescence. 2. PistiII:ite flower. 3. Ovary 

 ^•'th style and stylodia. 4. Sanits the ovary laid open. 5. Staminate flower. All 



