90 
BOTAKY. 
upper ones cuneiform, incised ; stipules ovate-lanceolate, small, entire or 
toothed ; flowers crowded, fastigiately cymose ; bracts short, 3-5-clefl ; calyx- 
lobes narrowly triangular, exceeding the linear-subulate accessory ones ; petals 
spatulate, longer than the calyx. — Root thick, fusiform ; flowers small, rose- 
color. Oregon, (Nuttall.) Near Carson City, (112 Anderson,) and Lake 
Washoe, (128 Torrey.) 
IvESiA^ GoEDONi, T. & G. (Horkella, Hook., Kew Jour. Bot. 5. 341, t. 
12.) Viscid-pubescent or glabrate ; stems 3-8' high, several from a thick 
resinous caudex, exceeding the leaves ; leaflets 2-3" long, about 20 pairs, 3-5- 
parted, segments cuneate-oblong or linear-oblong, obtuse, entire or bifid ; the 
single cavdineleaf J-1' long, subpinnately divided with entire leaflets ; stipules 
ovate-lanceolate, entire ; cyme capitate, many-flowered ; calyx turbinate, the 
lobes triangular-ovate, a little longer than the accessory linear ones ; petals 
yellow, oblong or oblanceolate, about equaling the shorter sepals, (or subor- 
bicular and exceeding the calyx ;) stamens 5 ; receptacle long-villous ; carpels 
1-3, usually 2, (sometimes 6-14.) — The numerous specimens of the collection 
are constant in their characters, having but 1-3 carpels, 5 stamens, and short 
narrow sepals, (both before and after anthesis,) and accord in these respects 
with 1896 and 2071 Brewer. His 1698 and 1723 diff'er in their much larger 
conspicuous orbicular petals and in their larger number of carpels. But the 
number both of carpels and stamens is variable in most of the species of the 
genus. /. lycopodioides, described as pentandrous, has sometimes 10-15 sta- 
mens, and /. pygmcBa has often as many as 15 carpels. Both differ from /. 
Gordoni in their much less villous receptacle and shallower calyx. On the 
Upper Platte, (Gordon ;) New Mexico and the Sierras of California. Abund- 
ant in localities in the Wahsatch and Uintas at an elevation of 9-10,000 feet; 
July, August. (345.) 
IvESiA Baileyi. Viscidly pubescent ; stems several, 3-6' high, from a 
thick perennial branching caudex, slender, branching above, exceeding the 
leaves ; leaflets 2-3" long, 3-10 pairs, broadly ovate or flabelliform, 3-7- 
toothed or 3-7-partcd ; stipules ovate, entire or 2-3-toothed ; flowers axillary 
«IVESIA, T. Sl G. Calyx cniiii.aiinliit.' or cyntliiform at li)a3e, 10-cleft. Stamens ilefiuite, (5, 10 
15, 20;) filaments slen«lor, narrowly subulate or lilifonii. Carpt-k few, sometimes solitary, upon a small 
Villous reeeptaele ; style snbterminal. — Leaves pinnate, leuliets very numerous, small, palmately or po- 
dately-partt il. closely ci owded, sometimes qnnsi-vertieillate or imbrieate ou all sides of the racbis'; petals 
broadly obovate, scarcely uui^uiculate, becoming- .spiitiibite. Guay, Fvoc. Amcr. Acad. C^. 530. 
This genus, as well as the preeedinj; one, is rc<luced to FotentiUn by lieutham and Hooker and by 
other botanists. However correct this may prove to be, it is thought best here to consider them aa 
distinct. 
