172 



does about Philadelphia, while it occurs in both open and shaded 

 bogs. 



A. piisilhtm and Stewardsoni may be distinguished at any stage 

 from triphyllum by the shining green under-surfaces of the leaves. 



Witmer Stone. 

 Academy of Natural Sciences, Philadelphia. 



A new Bamboo from Cuba. — Among the grasses collected 

 during the past year in Cuba was a queer member of the genus 

 Arthrostylidium, which, upon investigation, proves to be unde- 

 scribed. On account of the long narrow leaf-blades, quite un- 

 usual in this genus, this interesting addition to the grass flora of 

 the West Indies has been given the name of 



Arthrostylidium angustifolium. A branching shrub, climbing 

 on bushes and small trees, with long and narrow leaf-blades and 

 paniculate inflorescence. Stems 2-3 m. long, slender : leaves 

 crowded at the end of the branches ; sheaths overlapping, short, 

 ciliate on the margins ; ligule 4-5 mm. long, split into several 

 long teeth; blades erect, strict, long-acuminate, 1.5-2.5 dm. 

 l° n g. 3-4 mm - wide, smooth and glabrous on the lower surface, 

 the upper surface paler and rough on the nerves with very short 

 hairs: inflorescence paniculate, slender, 1.5-3 dm. long, its 

 branches erect and appressed, the larger 4—6 cm. long and bear- 

 ing usually three appressed spikelets : spikelets linear, 22—30 

 mm. long, 2—2.5 mm. wide, laterally compressed, consisting of 

 8-12 scales which are appressed-pubescent on the inner surface ; 

 lower three scales empty, long-acuminate, much more pointed 

 than the flowering scales ; flowering scales 5-6 mm. long, about 

 twice the length of the internodes of the rachilla, acute, ovate- 

 lanceolate when spread out, about 9 -nerved, the palet about as 

 long as the scale. 



Collected on El Yunque Mountain, Baracoa, Cuba, by Under- 

 wood & Earle, March, 1903, no. 941. Type specimen in the 

 herbarium of the New York Botanical Garden. 



The genus Arthrostylidium is mainly distinguished from the 

 closely related Arnndiuaria, to which our two canes of the south- 

 ern states belong, by having three empty scales at the base of the 

 spikelet instead of two. It is confined to the tropics of America, 

 and at present consists of about twenty species, including this new 

 one from Cuba, nine of which are found in the northern part of 



