This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", 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..
Sedum Nuttallianum Raf. Atl. Journ. 1: 146. 1832.
Sedum Torreyi Don, Gard. Dict. 3: 121. 1834.
Sedum sparsiflorum Nutt.; T. & G. Fl. N. A. 1: 559. 1840.
Annual, low, tufted, glabrous, 2'-3' high. Leaves alternate, scattered, linear-oblong, teretish, sessile, entire, 2"-6" long; cyme 2-5-forked, its branches ¥-2' long; flowers sessile or very short-pedicelled, about 3 1/2" broad; petals yellow, lanceolate, acute, somewhat longer than the ovate sepals; follicles widely divergent, tipped with the short subulate style.
In dry, open places, Missouri and Arkansas to Texas. May.
Perennial, tufted, glabrous; flowering branches erect, 3-7' high. Leaves alternate, crowded but scarcely imbricated, except on the sterile shoots, sessile, terete or linear, 3"-8" long, entire; cyme 3-7-forked, compact, the branches 1/2'-1' long; flowers mostly short-pedicelled, 4"-5" broad; petals narrowly lanceolate, very acute, yellow, much exceeding the calyx-lobes; follicles about 2" long, their subulate style-tips at length somewhat divergent.
In dry rocky places, South Dakota to Alberta, Nebraska, Oregon and California. May-June.
Sedum reflexum L. Sp. Pl. Ed. 2, 618. 1762.
Perennial by a creeping stem producing numerous short barren shoots, the flowering branches erect, 8'-14' high. Leaves alternate, sessile, densely imbricated on the sterile shoots, terete, somewhat spurred at the base, 3"-9" long; cyme 4-8-forked, its branches recurved in flower; flowers 4"-6" broad; petals linear, yellow, two to three times as long as the short ovate sepals; follicles about \\" long, tipped with a very slender somewhat divergent style.
Sedum pulchellum Michx. Fl. Bor. Am. 1: 277. 1803.
Perennial (?), glabrous, ascending or trailing, branched at the base, 4'-12' long. Leaves densely crowded, terete or linear, sessile, obtuse at the apex, slightly auriculate at the base, 3"-12" long, about l" wide; cyme 4-7-forked, its branches spreading or recurved in flower; flowers sessile, close together, 4"-6" broad; petals rose-purple, pink, or white, linear-lanceolate, acute, about twice the length of the lanceolate obtusish sepals; follicles 2"-3" long, tipped with a slender style.
On rocks, Virginia to Georgia, west to Indiana, Kentucky, Missouri, Kansas and Texas. May-July. Cultivated in the South under the above name. Flowering-moss.