FIGURE 1. Merostachys mexicana. A. Culm segment showing a culm leaf with its reflexed blade. B. Internode showing two nodes and bud. C in A new species of Merostachys (Poaceae: Bambusoideae: Bambuseae: Arthrostylidiinae) with the northernmost distribution of the genus

FIGURE 1. Merostachys mexicana. A. Culm segment showing a culm leaf with its reflexed blade. B. Internode showing two nodes and bud. C. Detail of the apsidate (fan-shaped) early bud development. D. Culm fragment showing the node and hollow culm with thin walls. E. Culm fragment showing flowering branches. F. Foliage leaf complement. G. Inflorescence showing paired spikelets. H. Spikelet lateral view showing the lower and upper glumes and lemma. Drawing by Daniel Barba based on Ruiz-Sanchez et al. 542 (A–D, F) and Zamudio et al. 16946 (E, G and H).