82 | HYDROPHYLLACEH. (WATERLEAF FAMILY.) 
* Leaves simple and entire, or with a pair or two of similar and smaller leaflets or lobes. 
1. P. circinata, Jacq. f. A span to a foot or two high from a stout root, hispid and 
the foliage strigose, either green, grayish or canescent, with a soft pubescence; leaves 
from lanceolate to ovate, acute, the lower tapering into a petiole and some bearing lateral 
leaflets; inflorescence in dense scorpioid hispid spikes, crowded; corolla dull or bluish 
white; filaments much exserted.—A very variable species; usually many stems from one 
root; some with large entire, ovate green leaves only. 
2. P. Breweri, Gr. Foliage and habit similar to the last, but smaller and more 
slender, from an annual root; leaves seldom an inch long, many of them 3-5-parted, the 
lanceolate lateral lobes ascending; corolla smaller (scarcely 3 lines long), blue or violet; 
filaments not exserted, 
* * Leaves simple, rounded, cordate, lobed and serrate. 
3. P. malveefolia, Cham. Stout, loosely branching, hispid with stinging hairs; 
leaves 2 inches or more in diameter; spikes solitary, or in pairs; corolla 3 to 6 lines long, 
dull white or bluish; stamens much exserted. 
*** Leaves once to thrice pinnatifid or p tel; d, oblong in general outline. 
Calyx bristly hispid, its lobes not panels seseaiee Diente the species difficult to dis- 
criminate, 
4. P. tanacetifolia, Benth. Erect, 1 to 3 ft. high, roughish, hirsute or hispid; 
leaves 9-17-divided in narrow once or twice pinnately parted or cleft divisions, all sessile 
or nearly so; the scorpioid spikes clustered; the short pedicels erect or ascending; corolla 
usually of a dirty mottled white or bluish; stamens and style much exserted; calyx lobes 
not twice the length of the capsule. 
5. P. ramosissima, Dougl. Straggling, somewhat viscid above; leaves pinnately 
5-7-divided or parted into linear pinnatifid-incised divisions; the short pedicels soon 
horizontal; stamens and style moderately exserted; calyx lobes more than twice the 
length of the globular capsule; flowers bluish. 
6. P. ciliata, Benth. A span to a foot high; leaves rarely divided but incised or 
cleft and toothed; spikes simple or in pairs; stamens usually not surpassing the open 
corolla; calyx lobes ciliate with glandular bristles; corolla blue. 
**** Leaves entire, or the lower 1-2-lobed, not cordate, the veins parallel or converging, as 
in P. circinata; no glandular pubescence ; calyx with long hairs; seeds more than 4. 
7. WP. divaricata, Gr. Diffusely spreading, a span or more in height; leaves ovate 
or oblong; style 2-cleft at the apex only; corolla violet, about 10 lines in diameter. 
4 EMMENANTHE, Benth. 
Distinguished from Phacelia by the persistent yellow or cream-colored corolla. 
