This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Tall glabrous herbs, with fibrous roots, basal linear leaves and large erect or spreading mostly orange or yellow flowers clustered at the ends of leafless scapes. Perianth funnel-form, its lobes oblong or spatulate, much longer than the cylindric tube. Stamens 6, inserted at the summit of the perianth-tube, shorter than the lobes, declined; filaments filiform; anthers linear-oblong, the sacs introrsely dehiscent. Ovary oblong, 3-celled; ovules numerous in each cavity; style slender, declined, tipped with a small capitate stigma. Capsule oblong or ovoid, thick-walled, 3-angled wrinkled, loculicidally 3-valved. [Greek, beautiful for a day.]
About 5 species, natives of Europe and Asia. Type species: H. Lilio-Asphodelus L.
Hemerocallis fulva L. Sp. PI. Ed. 2, 462. 1762.
Scapes 3°-6° high, stout, mostly longer than the leaves. Leaves 4"-6" wide, channeled, tapering to an acute tip; scape bearing several short bracts above; flowers 6-15, short-pedicelled, tawny orange, panicled, 4'-5' long, opening for a day; tube of the perianth 1'-1 1/2' long, the lobes oblong, somewhat spreading, netted-veined; the three outer nearly flat, acutish; the 3 inner undulate and blunt.
In meadows and by streams, New Brunswick to Virginia and Tennessee. Europe and Asia. Escaped from cultivation. Eve's-thread. Lemon-lily. June-Aug.
Hemerocallis flava L., the Yellow day-lily, with yellow flowers, their lobes parallel-veined, is occasionally found near old gardens, and on roadsides.