456 SYMPETALAE 
KEY TO THE ORDERS OF SUB-CLASS II 
The Sympetalous or Monopetalous Exogens 
(Characters are for plants within our area only). 
1. Ovary SUPERIOR 
(The corolla and calyx form, each a whorl below the ovary to 
which neither is attached. Exceptions: Family Vacciniaceae, 
Family Symplocaceae.) 2 
1st. Group. Stamens as many as the lobes of the corolla and 
alternate with them; or stamens twice as many as the corolla 
lobes. Stamens free from the corolla or very nearly so. 
Orver I. ERICALES 
2nd. Group. Five stamens inserted into the corolla, each opposite 
to a lobe of the corolla, or twice as many as the lobes, or more. 
Herbs: cise, Sook et & ORDER TT) SPR ee 
Eight to 16 stamens, inserted into the tube of the 4-lobed 
corolla. Shrubs and trees . Orpver III. EBENALES 
3rd. Group. Stamens 5 or less, inserted into the corolla tube. 
When equal in number to the lobes of corolla, alternate with 
them. 
Ovaries 2, distinct (except in Gentianaceae and in Men- 
yanthes). Flowers regular; leaves mostly opposite; sta- 
mens attached to the lower part of the corolla tube 
. Orver IV. GENTIANALES 
Ovary 1, compound; flowers regular (irregular in Hchium). 
Stamens mostly joined to corolla tube above the middle. 
Herbs twining or erect . . Orprer V. TUBIFLOREAE 
Ovary 1, mostly deeply 4-lobed, around the style. Flowers 
irregular (regular in Solanaceae, in Mentha and Lycopus). 
All irregular corollas 2-lipped. Stamens as many as the 
lobes of the corolla. Herbs. Capsule 2, rarely 1-seeded. 
Leaves mostly opposite . Orprer VI. VERBENINALES 
