242 ME. N. E. BBOWN ON SOME NEW AE0IDE3!. 



On some new Aroideae ; with Observations on other known forms. 



— Part I. By N. E. BbowX A.L.S., Herbarium Boyal 



Gardens, Kew. 



[Read April 15, 1880.] 



(Plates IV.-VI.) 

 Under the above title I propose to make known to science some 

 of the numerous undescribed Aroideae contained in the Kew 

 Herbarium, to redescribe or add notes upon imperfectly de- 

 scribed or little known species, to give references to figures or 

 descriptions of species which have been omitted by Prof. Engler 

 in his recent account of the Order in DeCandolle's ' Monogra- 

 phiae Phanerogamarum,' vol. ii., and, lastly, to call attention to 

 those species which have been described, or figured since the pub- 

 lication of that work. This, it is hoped, will form a useful sup- 

 plement to Engler' s monograph, and bring our knowledge of 

 Aroids down to the present date. 



As regards the limitation of the genera, I have, in most cases, 

 followed Engler; but in their arrangement I prefer to follow 

 Sehott, as upon the whole his classification appears to me much 

 the best and simplest that has yet been proposed. The type 

 specimens of all the new species and all the numbers quoted under 

 other species mentioned or described in this part, are preserved 

 in the Kew Herbarium, with the exception of those recently 

 described by other authors, and of Lamont's specimen ofAriscema 

 penicillatum from Hong Kong, which is in the British-Museum 

 Herbarium. 



Subtribe Cbtptocoetnin^:. 



Cetptocoetne, Fischer. 



C. caudata, 2T. U. Br. (Plate IV.) 

 Lamina folii late elliptica vel ovata, acutiuscula vel obtusiuscula, basi cor- 

 data, margine eroso-dentata, intra venas valde depresso-bullata. Spatha 

 petiolo longior, tubo cylindrico, limbo in cuspidem subuliformem quam 

 tubus duplo longiorem prolongato. Spadix i poll, longus, syncarpidio* 

 sessili, 6-7 loculari. Borneo, ad flumen Lawas (Burbidge !). 



* The term syncarpidium was given by Sehott to the entire female inflores- 

 cence in this genus, which differs from that of all other Aroids. The one-celled 

 ovaries are in a single whorl around and adnate to the base of the slender 

 spadix, and are more or less connate, so as to appear like a several-celled syn- 

 carpic ovary, with the slender axis of the spadix rising from its centre. Im- 

 mediately above the syncarpidium and partly concealed by its styles and stigmas 

 is a second whorl of minute utterly abortive ovaries. 



