ra i PRIMULACE DODECATHEON 
9 Anagallis Corolla completely rotate, 5-parted. 
10 Centuneulus Corolla with a globular tube and 4-5-lobed limb, short- 
er than the calyx. 
TRIBE 11. Ovary connate at base with the base of the calyx. 
11 Samolus Leaves alternate: flowers 5-merous: corolla nearly cam- 
panulate: capsule 5-valved at the apex. 
Tribe 1 Primulex Endl. Gen. 730. Ovary wholly free: ovules 
fixed by the middle amphitropous or half anatropous. 
§ Scapigerous or tufted. Flowers chiefly 5-merous, wmbellate or 
solitary: lobes of the corolla imbricated in bud. Capsule dehiscent 
by valves sometimes obscurely so. 
x Stamens connivent in a cone around the style, monadelphous 
1 DODECATHEON L. Gen. n, 200. 
Low acaulescent perennial herbs with entire leaves and few or 
numerous flowers in an umbel terminating a naked scape. Calyx 
deeply 5-lobed, the lobes reflexed in flower, erect in fruit. Corolla 
5-parted, with very short tube and dilated thickened throat, the 
long and narrow divisions reflexed. Stamens inserted on the 
throat of the corolla: filaments short and flat, monadelphous, but 
separable in age. Style filiform, exserted: stigma small. Pla- 
centa columnar, many-ovyuled. 
* Filaments distinct. 
DD. dentatum Hook. FI. ii, 119. Glabrous throughout: leaves ovate, 
the blade 2-4 inches long by 1-2 inches broad, irregularly dentate, usually 
abruptly contracted below toa margined petiole nearly as long as the blade: 
scapes 4-8 inches long, few-flowered: involucral bracts linear, acuminate: 
calyx lobes triangular, acuminate, a line or more long: Jobes of the corolla 
white with two purple spots at the base of each, linear-oblong, obtuse, 4-6 
lines long: filaments very short; anthers linear-lanceolate, 2-toothed at the 
apex, brownish-red: capsule but little longer than the calyx, early opening 
from the apex by valves: seeds flat. In wet places on the bluffs of the 
Columbia river, and in Idaho. 
D. campestrum. Glabrous throughout: leaves oblong, obtuse or acu- 
tish, 1-2 inches long, tapering below to a broad petiole: scapes 3-6 inches 
high, 1-3-flowered: involucral bracts lanceolate, acuminate, 1-3 lines long: 
pedicels 4-6 lines long: calyx-lobes lanceolate, acute, 2 lines long: lobes of 
the corolla narrowly oblong, abruptly narrowed near the apex, 6-7 lines 
long, a line or more broad, pink above, with blue centre and white base: 
filaments very short,: anthers linear-oblong, obtuse, pink with dark pur- 
ple base: capsule oblong, opening by persistent valves. In prairies on the 
Klickitat hills, Klickitat Co. Washington. 
* * Filaments more or less joined together into a tube: 
+ Capsule opening by an operculate tip. 
D. viviparum Greene Eryth. iii, 38. ‘‘ Rootstock stout, horizontal 
or ascending short, simple or with a few branches, bearing coarse white 
fibrous roots beneath, and rather large bulblets above: leaves 6-10 inches 
long, oblong-lanceolate, tapering to a winged petiole, acute or obtuse at 
apex, the whole margin coarsely and regularly but not deeply crenate, 
