RUGOSE • DICTIONARY ONE.COM • Definition of Rugose

... the Rugose Corals, the Lower Silurian rocks contain a number of curious compound corals, the tubes of which have either no septa at all or merely rudimentary ones, but which have the transverse partitions or "tabulae" very highly developed. These are known ...

— The Ancient Life History of the Earth • Henry Alleyne Nicholson

... the first being very small. The second and the third glumes are broadly ovate-oblong with acute tips. Both are of the same height and texture, but the second is 7-nerved and the third 5-nerved. The fourth glume is membranous when young, but later on it becomes thick, coriaceous and rugose at the surface. Just opposite to the fourth glume there is a flat structure with two nerves, similar to the glume in texture. This is called the palea. The fourth glume and its palea adhere together by their margins. Inside the fourth glume and between it ...

— A Handbook of Some South Indian Grasses • Rai Bahadur K. Ranga Achariyar