286 NORTH AMERICAN FLORA [VoLUME 22 
II. Eremicae. Stems many from the caudex, decumbent or ascending, leafy. Flower- 
clusters open, with lax branches. Hypanthium hemispheric. Petals broadly obovate or 
nearly orbicular to oblong, white, almost destitute of claw. Stamens 20. Plants glabrous, 
or slightly appressed-hirsute, with numerous leaflets. 
7. Ivesia eremica (Coville) Rydberg. 
Potentilla eremica Coville, Proc. Biol. Soc. Wash. 7: 76. 1892. 
Potentilla Kingii incerta M. E. Jones, Zoe 4: 277. 1893, 
Horkelia eremica Rydb. Mem. Dep. Bot. Columbia Univ. 2: 147. 1898. 
Perennial, with a deep, thick, woody root, crowned by a cespitose caudex ; stems several, 
decumbent or ascending, finely grayish-puberulent or glabrate, 2-4 dm. high, simple, 
somewhat leafy; stipules ovate, 5 cm. long or less, entire; basal leaves very numerous, 
grayish hirsute-ciliolate or glabrate, nearly terete and worm-like, with densely crowded 
ovate leaflets 2-3 mm. long, which, however, are evidently two-ranked ; stem-leaves sim- 
ilar ; cyme narrow, with erect branches, the pedicels 5-15 mm. long; hypanthium puberu- 
lent or glabrate, saucer-shaped, 3 mm. broad; bractlets ovate or oblong, about a third the 
length of the lanceolate sepals, which are 3mm. long; petals white, obovate, exceeding the 
sepals by one half, rounded at the apex; stamens 20; filaments filiform. 
TYPE LOCALITY: Watkins’ Ranch, Ash Meadow, Nye County, Nevada. 
DISTRIBUTION : Desert regions of Nevada. : 
ILLUSTRATIONS: Contr. U. S. Nat. Herb, 4: f/.7; Mem. Dep. Bot. Columbia Univ. 2: p1. 89, 
8. Ivesia Kingii S. Wats. Bot. King’s Expl. 91. 1871. 
Potentilla Kingti Greene, Pittonia 1: 105. 1887. 
Horkelia Kingit Rydb. Mem, Dep. Bot. Columbia Univ. 2: 148. 1898. 
lvesia pallida Greene ; Rydb. Mem. Dep. Bot. Columbia Univ. 2: 148, asa synonym. 1898, 
Perennial, with a thick, deep and woody root, crowned with a very short erect caudex ; 
stems several, leafy, glabrous, prostrate, 2-4 dm. long; stipules ovate, 5-8 mm. long, 
entire; basal leaves numerous, glabrous and shining, about 5 cm. long, pinnate, with 20- 
25 pairs of crowded leaflets, glabrous ; leaflets 3-5 mm. long, divided to the base into 24 
ovate or oblong segments; cyme narrow, with slender pedicels 5-10 mm. long; hypan- 
thium saucer-shaped, in fruit 3-4 mm. in diameter; bractlets ovate or lanceolate, about 
half as long as the broadly lanceolate sepals, which are 2 mm. long; petals white, obovate 
or broadly spatulate, much exceeding the sepals ; stamens 20; filaments filiform. 
TYPE LOCALITY : Monitor Valley, Nevada. 
DISTRIBUTION : Desert regions of Nevada and western Utah. 
ILLUSTRATION : Mem. Dep. Bot. Columbia Univ. 2: p/. 90, f. 1-5. 
9, Ivesia callida (Hall) Rydberg. 
Potentilla callida Hall, Univ. Calif. Publ. Bot. 1: 86. 1902. 
Perennial, with a thick woody root ; stems several, slender, erect or ascending, 5 cm. 
or less high, villous throughout with long hairs and also bearing some glandular hairs 
above; stipules ovate, entire or toothed; leaves villous, pinnate; the lower 12-20 mm. 
long with about 7 pairs of crowded leaflets; the upper much shorter, bract-like, with 1-5 
pairs of leaflets ; leaflets 2 mm. long, divided to the base into 2 or 3 oval segments; flowers 
sometimes solitary or 3-6 in a simple inflorescence ; hypanthium saucer-shaped, 3-5 mm. 
wide; bractlets narrow, half as long as the narrowly ovate, acute sepals; petals white, 
oblong, obtuse or acute at the apex, narrowed but not clawed at the base, about 3 mm. long, 
a little exceeding the sepals ; stamens 20; filaments filiform ; pistils several. 
TYPE LOCALITY: Cracks of rocks, Taheuits Peak, San Jacinto Mountains, California. 
DISTRIBUTION : Known only from the type locality. 
III. Lycopodioides. Low and cespitose plants, with very thick caudices and short, few- 
leaved and subscapiform stems. Hypanthium hemispheric or saucer-shaped, in 7. Gordonii 
campanulate. Petals generally cuneate or oblnaceolate, mostly clawed. Stamens 5 or 10. 
Plants silky, glandular or glabrate. Leaflets, except in 7. Webberi, very numerous, very 
small and closely imbricate. 
