26 FAMILY KEY 



GROUP 18 — Dicotyledonous herbs with alternate simple 

 leaves and polypetalous flowers with few stamens 



A. Peat bog plants; leaves all in a basal rosette, oblanceolate or spatulate, very con- 

 spicuously glandular-hairy, red or reddish green; leaf blades not over 2 cm. long. 



Droseraceae (p. 116) 

 AA. Not peat bog plants; leaves not as above in all characters. 

 B. Two or more separate pistils to each flower. 

 C. Leaves fleshy, pinnately veined or i-veined; pistils the same in number as the 

 sepals or the petals. Crassulaceae (p. 117) 



CC. Leaves not fleshy, or if so, palmately veined; pistils only rarely the same in; 

 number as the petals or the sepals. I 



D. Leaves either coriaceous and evergreen or else peltate; st&mens 5-10, in- 

 serted on the calyx tube. Saxifragaceae (p. 118) 

 DD. Leaves not coriaceous and evergreen, not peltate; stamens rarely s or 10, 

 inserted on the receptacle. Ranunculaceae (p. 95) 

 BB. Only i pistil to each flower. 

 E. Leaves palmately veined. 



F. Plants with mustard or turnip taste; pod linear; sepals 4; petals 4; stamens 

 6. Cruciteraceae (p. 106) 



FF. Plants without mustard or turnip taste; pod not linear; sepals none or s; 

 petals 5; stamens s or 10. 



G. Flowers irregular; i petal spurred. Violaceae (p. 153) 



GG. Flowers regular or nearly so; petals not spurred. 



H. Petals on the receptacle; ovary superior, 5-celled; flowers not in um- 

 bels. Geranium in Geraniaceae (p. 143) 

 HH. Petals on the calyx; ovary superior or half inferior, 1-2-celled; flowers 

 not in umbels. Saxtfragaceae (p. 118) 

 HHH. Petals on the ovary; ovary inferior, 2-celled; flowers in umbels. 



Umbellaceae (p. 163) 

 EE. Leaves pinnately veined. 

 I. Ovary superior. 

 J. Plants with mustard or turnip taste; sepals 4; petals 4; stamens 6. 



Cruciteraceae (p. 106) ' 

 JJ. Plants without mustard or turnip taste; sepals and petals rarely 4; sta- 

 mens rarely 6. 

 K. Flowers regular or very nearly so, not spurred. 

 L. Leaves basal, linear, 2.5-7.5 cm. long, somewhat thick or fleshy; flowers 

 in a dense head, reddish; near the seashore. Plumbaginaceae (p. 178) 

 LL. Leaves not as above in all characters; flowers not in a dense head. 

 M. Sepals 2. Portulacaceae (p. 86) 



MM. Sepals 3-8. 

 N. Leaves coriaceous, evergreen, glabrous. 

 O. Carpels 2-4; styles or sessile stigmas 2-4. 



Saxifraga in Saxifragaceae (p. 118) 

 GO. Carpels 5; style i; stigmas i or 5. Pyrolaceae (p. 169) 



NN. Leaves not coriaceous nor evergreen, often not glabrous. 

 P. Leaves very fleshy. 



