Indusium

Definition and stakes

Asa Gray,  The Manual of the Botany of the Northern United States

“ Sporangia collected in dots, lines, or variously shaped clusters (sori or fruit-dots) on the back or margins of the frond or its divisions, cellular-reticulated, stalked, the stalk running into a vertical incomplete many-jointed ring, which by straightening at maturity ruptures the sporangium transversely on the inner side, discharging the spores. Fruit dots often covered (at least when young) by a membrane called the indusium (or less properly the involucre) , growing either from the back or the margin of the frond. ”
Source: Gutenberg

Sir Alexander Burnes,  Travels into Bokhara (Volume 3 of 3…

“ The inconstancy of the Indus through the delta is proverbial, and there is here both difficulty and danger in its navigation. It has in these days, among the people of Sinde, as bad a character as has been left to it by the Greek historians. The water is cast with such impetuosity from one bank to another, that the soil is constantly falling in upon the river; and huge masses of clay hourly tumble into the stream, often with a tremendous crash. ”
Source: Gutenberg

John Watson McCrindle,  The Invasion of India by Alexander the Great as described by Arrian… (1896)

“ The resemblance of the lower valley of the Indus from the time it has received the waters of the Panjab with Egypt is dwelt upon by modern travellers. One description (says Mr. Elphinstone) might serve for both. A smooth and fertile plain is bounded on one side by mountains, and on the other by a desert. It is divided by a large river, which forms a Delta as it approaches the sea, and annually inundates and enriches the country near its banks. The climate of both is hot and dry, and rain is of rare occurrence in either country.”—v. Bunbury’s Hist. ”
Source: Gutenberg

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