X, c. 5 Merrill: Philippine Plants, XII 289 



This species has not previously been reported from the Philippines. 

 Widely distributed in central and in temperate eastern Asia, extending from 

 Sikkim and Tibet to Japan, southward to Burma, southern China, and 

 Formosa. It is known from no part of Malaya and must be considered a 

 northern type in the Philippine flora. 



The commoner and widely distributed Acorus calamus L. occurs in 

 the Philippines as an introduced and cultivated plant, but is thoroughly 

 spontaneous in some localities in Mountain Province, Luzon. 



AMORPHOPHALLUS Blume 



AMORPHOPHALLUS LUZONIENSIS sp. nov. § Conophallus. 



Tuber parvum, depresso-globosum, in siccitate circiter 2 cm 

 diametro; foliis umbraculiformibus, tripartitis, segmentis cir- 

 citer 20 cm longis, pinnatisectis, segmentis utilimis oblongis vel 

 oblongo-ovatis, caudato-acuminatis, 5 ad 9 cm longis; petiolo 

 circiter 50 cm longo; pedunculis tenuibus, 10 cm longis; spathis 

 circiter 15 cm longis, 6 cm latis, purpureis; spadicis quam spatha 

 paulo brevioribus, cylindraceis, supra sensim caudato-angustatis ; 

 stilus quam ovario triplo longior. 



Tubers depressed-globose, when dry about 2 cm in diameter, 

 emitting many roots. Petioles slender, about 50 cm high ; lamina 

 umbraculiform, 3-partite, the segments pinnatisect, about 20 cm 

 long, membranaceous, the ultimate segments oblong to oblong- 

 ovate, caudate-acuminate, 5 to 9 cm long, nearly the same color 

 on both surfaces or slightly paler beneath, the sinuses acute, 

 extending almost or quite to the rachis. Sheaths of the peduncles 

 membranaceous, brown when dry, the outer ones oblong-lanceo- 

 late, 2 to 3 cm long, the inner ones lanceolate up to 10 cm in 

 length ; peduncles slender, up to 10 cm in length. Spathes purple, 

 about 15 cm long, thin, the tube broad, about 6 cm long, the lamina 

 ovate, slightly acute-acuminate or merely acute, about 6 cm wide. 

 Spadix slender, cylindric, a little shorter than the spathe, the 

 pistillate part about 2.5 cm long, 1 cm wide, the staminate part 

 contiguous, about 3 cm long and 8 mm wide, the appendage 

 slender, continuous, verruculose, caudate, at the base 5 mm in 

 diameter or less, gradually narrowed upward, the entire spadix 

 about 14 cm long. Pistillate flowers: Ovary depressed, about 

 1 mm long, 1.5 mm wide, 1-celled, 1-ovuled ; style slender, about 

 3 mm long ; stigma ovoid, entire, somewhat oblique, about 1 mm 

 long. Staminate flowers crowded, mostly 2-androus, the anthers 

 subglobose, 1 mm long, 1.5 mm wide, opening by two terminal 

 slits. 



Luzon, Province of Cagayan, Abulug River, For. Bur. 19560 Curran 

 (type), January, 1912, Weber s. n., same locality and date. 



A species growing in crevices of limestone ledges, quite different from 

 any other known Philippine form. Apparently through its elongated styles 



