THEROFON IIEUCHERAEFORME.
Saxifraga jamesii Hook. Fl. Bor. Am. 1: 47. 1833. Not Torr.
Caespitose with a thick scaly caudex, glandular-hirsute, 1-2 dm. high ; basal leaves round-reniform, deeply and often doubly crenate, on petioles about y, dm. long ; raceme simple or sonic what compound ; calyx campanulate or turbinate, tinged with purple ; sepals ovate, erect ; petals obovate-oblanceolate or oblong spatulate, dark violet, about equalling the sepals ; stamens 10 ; styles free. (Plate 305, fig. 3.) This has generally been confused with 7.Jamesu, which it much resembles in habit. The main characters that distinguish the two are: in 7. heutheraeforine the petals are dark bluish violet, scarcely exceeding the sepals and comparatively narrow, and the styles free (see plate 305, fig. 3); in T Jamesil the petals are reddish purple, orbicular on a long claw, and often twice as long as the sepals, and the styles are united to near the top (see fig. 4). Both
have 10 stamens, and differ in that respect as well as in habit from the other species of Therofon. In habit they much more re semble Heuthera. They may constitute a fairly good genus; but the arctic 7: Ricllara'sond seems to connect them with the other species with 5 stamens, small white flowers and diffuse panicles.
T hczethcraeforme extends from the Black Hills of South Da kota to the Teton range of Wyoming and northward. The follow ing specimens from Montana have been seen: Flodman, no. 514, July 28, 1896, from Bridger Mountains ; P. A. Rydberg, no. 2677, July 23, 1895, from Bozeman Callon ; Frank Tweedy, no. 255, 1887, from East Boulder. 7. Jamesil (Torr.) Wheelock, is as far as I know, confined to the alpine peaks of Colorado.