70 AKTIFICIAI. KET TO THE FAMILIES. 



B. — Leaves net-veined. 



A. No stamens; some leaves pinnatifid SviallMarsliValerian,9\Q 



B. Only one stamen; leaves undivided; flowers red..i?ed Valerian, ^\.Q 

 c. Stamens 2 or more. 



Stamens 2. 



Leaves all radical ; flower solitary Butterwort, 277 



Stem clothed with leaves. 



Ovary four-lohed, ripening into four seed-like 



finiits Sage family (some), 241 



Ovary single, two-celled, ripening into a many- 

 seeded capsule. 

 Numerous large bracts among the flowers . . . .Justicia family, 252 

 Bracts not remarkable. 



Placenta parietal (hot-house plants) Gloxinia family, 261 



Placenta axile Foxglove family, 252 



Stamens 3. 



Leaves undivided Bli7iks, 148 



Leaves moi-e or less pinnatifid Small 3IarshValerian,9l7 



Stamens 4 (sometimes a fifth without an anther). 

 a. Two long stamens and two short ones. 



1. Corolla two-lipped and closed Foxglove family, 252 



2. Corolla two-lipped and open. 



Leaves alternate or scattered Foxglove family, 252 



Leaves opposite. 



Ovary four-lobed, ripening into four seed- 

 like fruits Sage family (most), 241 



Ovary two-celled, ripening into a many- 

 seeded capsule Foxglove family, 252 



3. Corolla tubular, four or five-lobed. 



Ovarj' four-lobed, ripening into four seed- 

 like fruits Sage family, 241 



Ovary single, two-celled. 



Seeds winged Bignonia family, 240 



Seeds wingless. 



Bracts usually many and large Justicia family, 252 



Bracts not remarkable Foxglove family, 252 



i. Stamens all of the same leugtli. 



Green-house evergreen shrubs, with dry, stiff 



leaves Protea family, 168 



Herbaceous plants. 



Ovary below the perianth ; flowers in 



heads Scabious family, 320 



Ovary free, inside the perianth. 



Ovary four-lobed, lobes one-seeded Sage family, 241 



Ovary two-celled, many-seeded Foxglove family, 252 



