Arthrostylidium Rupr., 1839

Ruiz-Sanchez, Eduardo, Clark, Lynn G., Londoño, Ximena, Mejía-Saulés, Teresa & Rodríguez, Gilberto Cortés, 2015, Morphological keys to the genera and species of bamboos (Poaceae: Bambusoideae) of Mexico, Phytotaxa 236 (1), pp. 1-24 : 12

Arthrostylidium Rupr.

Rhizomes pachymorph; culms hollow with thick walls, 2–4 m tall, 0.3–0.5 cm in diameter, clambering to scandent; culm leaf sheaths well developed, glabrous and deciduous, oral setae absent; culm leaf blades deciduous; branching intravaginal; node with one bud developing 3–5 branches the same size as the main culm; foliage leaf sheaths bearing fimbriae; foliage leaf blades with short pseudopetioles; synflorescences racemose; spikelets subsessile; rachilla ending with a reduced sterile floret; glumes glabrous, lemmas glabrous to puberulente; fruit a basic caryopsis.

1 species in Mexico: A. excelsum . Mexico to Panama; Chiapas; 1500–2500 m ( Fig. 2A–B ).

Figures

FIGURE 2. A–B. Arthrostylidium excelsum. A. Foliage complement. B. Branch complement. C–D. Aulonemia laxa. C. Culm showing the leaves in the apical portion. D. Detail of the ligular area, showing fimbriae.E–F.Merostachys sp.. E. Branches. F. Foliage complement, abaxial view showing the narrow green marginal stripe. A–D photos by E. Ruiz-Sanchez, E–F photos by M. T. Mejía-Saulés.