POLEMONIACEAE 95 
Leaf blades orbicular, rarely over 2.5 cm, long, scape 3-10 flowered. 
1. P. chlorantha. 
Leaf blades oval or elliptic, 3.5-4.5 cm. long, scape 7-15 flowered. 
2, P. elliptica. 
Raceme secund, capsule about 4 mm, in diameter, 3. P. secunda. 
1. Pirola chlorantha Sw. Green Flowered Wintergreen. 
On dry pine woods in the western part of the state. War Bonnet 
Canon. 
2. Pirola elliptica Nutt. Shin-Leaf. 
In dry pine woods in the western part of the state. Long Pine. 
3. Pirola secunda L. One-Sided Wintergreen. 
In dry pine woods in the western part of the state. Sioux County. 
2. Pterospora. 695. 
1. Pterospora andromeda Nutt. Pine Drops. 
In the pine woods of the northwestern part of the state. Sioux County. 
3. Monotropa. 696. 
1. Monotropa uniflora L. Indian Pipe. 
Rare in dense woods along the Missouri. Washington and Cass 
Counties. 
SUB-CLASS BICARPELLATAE. 
POLEMONIALES. 
Ovary not deeply lobed, carpels not separating into distinct nutlets 
at maturity. 
Ovary 2-5 celled. 
Fruit various but neither a berry nor a large prickly capsule. 
Twining vines. 2. Convolvulaceae. 
Herbs not twining. 
Ovary 8 celled. 1. Polemoniaceae. 
Ovary 2 celled. 
Flowers in dense capitate clusters: 1. Polemoniaceae. 
Flowers solitary in the axils. 2. Convolvulaceae, 
Fruit a berry or a large prickl} capsule. 5. Solanaceae, 
Ovary 1-celled, styles and stigmas 2. 3. Hydrophylaceae. 
Ovary deeply 4 (or rarely 2) -lobed, carpels separating into 4 nutlets 
at maturity. 4. Boraginaceae. 
1. POLEMONIACEAE. 
Stamens inserted at very unequal heights in the corolla tube, leaves 
entire. 
Leaves opposite, corolla with a narrow throat, stamens included. 
1. Phlox. 
Leaves alternate, corolla with a broad throat, stamens usually ex- 
serted. 3. Collomia. 
Stamens inserted at equal or nearly equal heights in the corolla, leaves 
various, rarely entire. ie 
Calyx lobes not spiny tipped. 2. Gilia. 
Calyx lobes spiny tipped. 4. Navarretia. 
