“LITHOSPERMUM CONVOLVULACEZ 493 
anthers oblong, sessile: style 2-lobed at the apex: nutlets white, smooth 
and polished, the inner face rather conspicuously carinate. On dry rocky 
hillsides, southwestern Oregon to California. 
_L. pilosum Nutt. Journ. Phil. Acad. vii, 43. Soft-hirsute and pu- 
bescent, pale or canescent stems numerous from the crown of a thick per- 
ennial root, 6-18 inches high, mostly simple, very leafy: leaves linear to 
linear-lanceolate, 2-4 inches long, mostly tapering from near the base to 
apex, often smalland bract-like below: flowers densely crowded in a leafy 
thyrsus: sepals linear 3-4 lines long, hispid: corolla campanulate-funnel- 
form, about twice the length of the calyx, silky outside, dull greenish-yellow, 
the lobes equalling the throat, nearly naked at the throat but obscurely 
puberulent and thickened under each lobe: style slender: nutlets broadly 
ovate, acute, smooth and polished, 2-3 lines long white and bony. Common 
on dry hillsides and plains, Brit. Columbia to California, and Nebraska. 
OrpverR LXVI CONVOLVULACEZE Vent. Tabl. ii, 394. 
Herbs, or some tropical species shrubs or trees, with generally 
twining or trailing stems, usually milky juice, alternate leaves 
without stipules, or leafless, truly axillary regular 5-merous, or 
rarely.4-merous flowers, except as to the pistil which is almost 
always 2-carpellary. Calyx mostly of distinct and imbricated 
sepals, persistent. Corolla either plicate and the pleats convolute 
or induplicate-valvate or sometimes imbricate in the bud, the 
limb either lobed or entire. Stamens as many as lobes of the 
corolla and alternate with them, usually inserted low down on 
the tube of the corolla; hypogynous disk usually annular and 
manifest. Ovary 2-celled or rarely 3-celled, with a pair of 
anatropous ovules in each cell, or spuriously 4- or 6-celled, 
each cell being more or Jess divided into a pair of 1-ovuled 
half-cells by a false partition, or rarely 2- or 4-parted from above 
around the style, Style single or once or twice divided: stigma 
terminal or introrse. Fruit capsular or sometimes fleshy. 
Seeds comparatively large, filled by a crumpled or pleated em- 
bryo involving or‘partly surrounding a little Lu i i or 
fleshy albumen, its cotyledons ample and foliaceous, or in Cus- 
cuta a spiral embryo without cotyledons. 
Tre 1 Plants with ordinary foliage, not parasitic. Ovary 
entire. 
1 Convolvulus Corolla plicate at the sinuses pleats twisted in the bud: 
style undivided or cleft only at the apex. 
TriBE 1 Leafless parasitic twining herbs without green color. 
Tribe 1 Convolvuleae Choisy in DC. Prodr. ix, 835 Plants with 
mostly twining or trailing stems, mostly milky juice and ordinary 
foliage, not parasitic. Ovary entire. 
2 Cuscuta Corolla with mostly spreading lobes, between convolute and 
imbricate in the bud. 
1 CONVOLVULUS L. Gen. n. 215. 
Herbs with trailing twining or erect stems, broad leaves and 
