464 
BOTANY. 
21. P. LixEAiuFOLTA, Gray. Glabrous or sometimes roughisb-pubescent above, 6-12' high, corymb- 
osely many-flowered ; leaves very narrowly linear, 1-2' long ; calyx strongly angled by the folded inter- 
costal membranes, the teeth acerose-subulate ; corolla-tube a little longer, the lobes obovate-cuneate, 
entire or rarely retuse ; ovules in pairs. — Idaho and Washington Territories. 
22. P. LOXGiFOLi.v, Nutt. Glabrous ov pubescent, 2-12' high ; leaves very narrow or sometimes 
lanceolate or oblong-lanceolate, ^-3' long ; corolla-lobes entire or retuse ; ovules usually solitary. See 
page 260. 
23. P. ADSURGEXS, Torr. Glabrous, excepting the glandular-pubescent subcymose inflorescence ; 
stems difl'use, ascending, slender, about 1° high ; leaves ovate or ovate-lanceolate, acute, i' long, usually 
much shorter than the internodes ; corolla-tube nearly 1' long, about twice longer than the subterete 
calyx, the lobes 5" long, obovate, entire ; style exscrted ; ovules solitary.— Canon Pass, Oregon ; only by 
Wood. 
(b.) Style usually shorter than the stigmas and ovary ; calyx cylindrical, with subulate lobes. 
24. P. srECioSA, Pursh. Somewhat viscid-puberulent or glabrate, 1-4? high, the branches ascending 
from a woody decumbent base ; leaves lanceolate or linear, 1^2' long, the upper mostly dilated at base ; 
flowers corymbed ; corolla pink or -white, the tube a little exceeding the calyx, the lobes obcordate, (or 
in Var. Sabixi, obovate and entire or retu=e ;) ovules solitary. — From Washington Territory to Califor- 
nia. Var. WooDHOUSii is a dwarf Arizona form with linear leaves, not dilated at base, and smaller 
flowers. 
25. P. XAXA, Xutt. Glandular-pubescent or roughish, sometimes glabrate, branches spreading from 
a woody base, 6-12' high ; leaves linear, ofteu alternate on the branches ; flowers scattered ; corolla pink 
or white, the tube a little longer than the calyx, the limb 12-15" broad, with very broadly cuueate-obo- 
vate lobes, entire or slightly erose ; ovules 2 or usually 3 in each cell. — Western Texas to New Mexico 
and S. Colorado. 
$ 4. Annual Texan species, loosely branched, more or less viscid-hairy ; leaves rather broad, the upper 
alternate; calyx-lobes shortly bristle-tipped, soon recurved or spreading, splitting nearly to the 
base in fruit ; stylo shorter than the stigmas ; seeds somewhat wing-angled. 
26. P. Di'.UMMONDii, Hook. Leg.ves usually lanceolate or oblong, the upper subcordate at base and 
half-clasping ; flowers corymbed ; ovules solitary. 
27. P. EocMERiAXA, Sclieclc. Low, loosely branched from the base, subglabrous ; leaves lanceolate, 
oblong, or the lowest si>atnlate, the caulino mostly alternate, hirsute on the margins ; flowers scattered ; 
corolla pink, the tube about equaling the spreading linear segments of the hirsute calyx, shorter than 
the very broadly obovate (6-9" long) lobes ; ovules 4-5 in each cell. 
COLLOMIA. 
§ EUCOLLOMIA, Gray. Ovules solitary (in C. heferopliijUa 2-3) in each cell; annuals, more or less 
viscid-piibescent 
* Leaves sessile, simple ; flowers usually crowded ; calyx obconical ; corolla narrow ; seeds with 
very abundant spiricles. 
(a.) Flowers in crowded leafy-bracted heads, or the lowest suhsolitary in the forks. 
1. C. GRAxniFLOi^A, Dougl. 1-2° high ; calyx-lobes broad, obtuse ; corolla 1' long, salmon-color. 
See page 261. 
2. C. LiXEAias, Xutt. Smaller ; calyx-lobes triangular-lanceolate, acute ; corolla y long. See 
page ii61. 
(5.) Flowers scattered, all solitary in the forks. 
n. C. TKXF.T.LA, Gray. Low, loosely branched ; leaves linear ; calyx-lobes triangular, acute ; corolla 
purplii^b, 3-4''' long. See p^go 2;)2. 
* * Leaves sessile, entire, the lower usually opposite; flowers loosely cymose or scattered; calyx 
roinuled at base, nearly 5-parted ; seed-coat without spiricles. 
4. G. GKACiLis, Dougl. Low, spreading ; leaves oval to linear ; calyx-lobes subulate-linear ; corolla 
purplish, 5" long. See page 262. 
* * * Leaves pinnately divided, incised or 3-5-parted, the lower petioled, alternate ; calyx obtuse at 
base ; corolla purplish, slender, 5-6" long, 2-3 times exceeding the calyx : seed spiricles beneath a 
delicate epidermis. 
5. C. GiLioiDES, Benth. ^-2" high ; leaves nearly simply divided; flowers loose or scattered ; calyx 
deeply cleft with linear-subulate lobes; cells 1-2-ovuled ; capsule globular. — W. California. 
