AEMERIACEAE. 107 



2. OXYPOLIS Eaf. Perennial herbs. Leaf -blades pinnate or ternate, or 

 rarely reduced to hollow septate phyllodia. Umbels compound. Sepals acute. 

 Petals white. Fruit longer than broad, dorsally flattened: carpels with the 

 dorsal and contiguous ribs thin, and winged lateral ribs, the latter nerved near 

 the inner part of the wing: oil-tubes solitary in the intervals and 2-6 in the 

 inner face. 



1. O. filiformis (Walt.) Britton. Plants 5-18 dm. tall: phyllodia 3-60 cm. 

 long: fruits oblong-oval or oval-obovate, 5-6 mm. long, broadly winged. Low 

 pinelands and lime-sinks, L. keys. [E. K.] 



Series 2. GAMOPETALAE. 



Petals more or less united, or occasionally distinct, or very rarely 

 wanting. 



Order PRIMULALES. 



Herbs, shrubs, trees, or vines. Leaves alternate or opposite, some- 

 times all basal. Flowers perfect or polygamo-dioecious, variously dis- 

 posed. Calyx of several partially united sepals. Corolla of 2-several dis- 

 tinct or partially united petals. Androecium of as many stamens as there 

 are sepals, or petals, and sometimes accompanied by staminodia. Gynoe- 

 cium of 4-6 united carpels, or rarely more. Fruit capsular or drupaceous, 

 or rarely an achene or utricle. 



Styles distinct : fruit an achene or utricle : ovule 1. Fam. 1. ARMERIACBAE. 

 Styles united : fruit capsular or drupe-like : ovules 



several. 



Herbs : ovules or seeds not immersed : fruit capsular. Fam. 2. PEIMULACEAE. 

 Shrubs or trees : ovules or seeds immersed : fruit 



drupe-like. 

 Staminodia at the sinuses of the corolla-lobes : 



fruit containing few or many seeds. Fam. 3. THEOPHEASTACEAB. 



Staminodia wanting: fruit containing a single 



seed. Fam. 4. AEDISIACEAB. 



FAMILY 1. AEMERIACEAE. PLUMBAGO FAMILY. 



Perennial or rarely annual herbs, or shrubby plants, or vines. Leaves 

 alternate, the bases dilated or clasping: blades entire. Flowers perfect, 

 in heads, spikes, or cymes. Calyx of 4 or 5 partially united sepals, the 

 tube ribbed. Corolla of 4 or 5 petals, the claws distinct or united. 

 Androecium of 4 or 5 stamens opposite the petals. Gynoecium of 4 or 5 

 united carpels. Styles or stigmas distinct. Fruit an achene or a utricle. 



Calyx not glandular : styles distinct or united at the base : petal-claws distinct or 

 nearly so. 1. LIMONIUM. 



Calyx glandular : styles united to near the top : petal-claws united 



into a tube. 2. PLUMBAGO. 



1. LIMONIUM [Tourn.] Hill. Shrubby herbs with short leafy caudices 

 and nearly naked flower-stems. Flowers in compound cymes. Calyx funnel- 

 form, the limb scarious and plicate. Corolla funnelform. SEA-LAVENDER. 

 MARSH-ROSEMARY. 



Leaf-blades oblong to broadly spatulate. 1. L. 'braslliense. 



Leaf-blades linear. 2. L. angustum. 



