Family POLEMONIACEA 105 
Subclass 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. Convolvulacez. 
Herbs not twining. 
Ovary 3-celled, stigmas three. 1. Polemoniacee. 
Ovary 2-celled. 
Flowers in dense capitate clusters. 1. Polemoniacez. 
Flowers solitary in the axils. 2. Convolvulacez. 
Fruit in our native species a berry or a prickly capsule, style 
one with a terminal stigma. 5. Solanacez. 
Ovary 1-celled, stigmas 2. 3. Hydrophyllaceez. 
Ovary deeply 4 (or rarely 2)-lobed, carpels separating into 4 
nutlets at maturity. 4. Boraginacee. 
1. POLEMONIACEZ. 
Phlox Family. 
Leaves entire. 
Leaves all, or at least the lower, opposite. 
Perennials with large flowers; leaves all opposite. 1. Phlox. 
Annuals with small flowers; upper leaves alternate. 2. Microsteris. 
Leaves alternate; flowers in capitate clusters. 4. Collomia. 
Leaves variously lobed or divided. 
Calyx distended and at length ruptured by the capsule. 3. Gilia. 
Calyx not distended or ruptured by the capsule, calyx teeth spiny- 
tipped, flowers small in dense clusters. 5. Navarretia. 
1. Phlox. 756. 
Flowers clustered, 2—-many at the ends of the stems or branches; 
leaves never imbricated. 
Stems many-flowered; leaves usually over 2 cm. long. 
Calyx act shorter than the tube, calyx % as long as the 
corolla. 
Calyx teeth more than half the length of the tube. 
P. paniculata. 
Calyx teeth about 4% the length of the tube. 1. P. maculata. 
Calyx teeth longer than the tube, calyx % as long as the 
corolla. 
Flowers usually pink or purple; no sterile decumbent shoots 
or runners at the base. 2. P. pilosa. 
Flowers bluish; sterile decumbent shoots or runners present 
at the base. 3. P. divaricata. 
Stems 2-few-flowered; leaves not over 2 em. long. 
Flowers blue or lilac; stems caespitose, spreading from a 
woody root. 5. P. kelseyi. 
Flowers white: stems erect from rhizomes. 8. P. douglasii. 
Flowers solitary at the ends of the stems or branches; leaves often 
imbricated. 
Leaves very short, about 2 mm. long. 6. P. bryoides. 
