GRAMINEAE. 



Tribus Bambuseae. 



Determined by A. B. Rendle. 



ARUNDINARIA Michx. 



Arundinaria dumetosa Rendle, n. sp. 



Frutex 0.6-2 m. altus; culmi valderamosi, teretes, glabri, in specimine 

 ad 4 mm. crassi; ramuli juveniles fasciculati; vaginae culmi internodia 

 subaequantes, chartaceae, glabrae, ramis floriferis arete circumvolutae; 

 ligula brevis truncata. Foliorum vaginae arete convolutae, glabrae; 

 ligula brevis truncata; glabra, ad 1.5 mm. longa; lamina in foliis juve- 

 nilibus lineari-oblonga, superne angustata, acuminata; 10-13 cm. longa, 

 1.5-2 cm. lata, basi subito inpetiolum ad 5 mm. longum angustata, in 

 foliis adultis oblonga, interdum deorsum angustata, apice late acumi- 

 nata, ad 22 cm. longa, 6.5 cm. lata, in petiolum circiter 1 cm. longum 

 subito angustata, glabra, margine scabridula; venae secundariae 

 utnnque 10-11, interspatiis minute tesselatis. Inflorescentia panicu- 

 lata; paniculae in ramis floriferis terminales et axillares, erectae, ad 

 14 cm. longae et 10 cm. latae; rami ramulique rigidule patentes v. 

 ascendenti-patentes; pedicelli et rhachis dense cinereo-pubescentes; 

 spiculae sex-florae, 2.2 cm. longae; glumae steriles 2-3, inaequales, 

 breviter aristatae, margine ciliolatae, dorso puberulae; inferior ovata, 

 3-4 mm. longa, 3-nervis, nervo mediano superne in aristam brevem 

 producto; superior ovato-oblonga, 4.5-5 mm. longa, apice acuminata 

 in aristam 2-2.5 mm. longam producta, dorso carinata, 5-7-nervis; 

 mterdum tertia huic similis sed major, 7-8 mm. longa; glumae florentes 

 membranaceae, approximatae (rhachillae articuli pilosuli), ovato- 

 oblongae, apice acuminata breviter aristatae, basi rhachillam amplec- 

 tantes et pilis brevibus e nodo ortis cinctae, super basin leviter cari- 

 natae, 7-nerves, sub apice et arista pilosulae, infima 8 mm. longa; 

 palea gluma brevior, 6 mm. longa, bicarinata, obtusa, 4-nervis, sub 

 apice sparse pilosulae; lodiculae 3, spathulatae, ciliolatae; stamina 

 non visa. Caryopsis oblonga, bnmnea, glabra, 6-7 mm. longa. 



Western Hupeh: Wen-tsao-shan, Hsing-shan-Hsien, forming 

 impenetrable thickets, alt. 1600-2500 m., June 1907 (No. 30). 



A very distinct species perhaps nearest A. Fargesii Camus, but distinguished by 

 the differently branched inflorescence, the fewer-flowered spikelets, etc. 



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