160 VERBEXACEAE. 



2. P. stoechadifolia (L.) Small. Plants rough-strigillose, diffuse or with 

 vine-like branches: leaf-blades thick, narrowly oblong to lanceolate, 2-12 cm. 

 long, acute, serrate, rugose, the veins impressed above, prominent beneath: 

 heads globose or depressed, becoming cylindric, sometimes elongate: calyx 

 2-2.5 mm. long: corolla purplish or pinkish, about 3 mm. long: fruits 1.5-2 

 mm. long. — Everglades. — {Bah., Cuba, Ant.) 



3. GONIOSTACHYUM Small. Shrubs or shrubby plants. Leaf-blades 

 mostly toothed. Flowers in congested axillary spikes, the bracts 4-ranked, of 

 an ovate type, keeled. Calyx flattened, 2-lobed. Corolla 2-lipped: tube gla- 

 brous within, much longer than the calyx. 



1. G. citrosum Small. Stems pale-gray or whitish: leaf -blades lanceolate to 

 elliptic-lanceolate, 2.5-6 cm. long, shallowly serrate, pubescent: spikes de- 

 pressed, short peduncled, 4-6 mm. long: bracts ovate: calyx about 1 mm. long: 

 corolla white, about 4.5 mm. long; limb about 3 mm. broad: nutlets 1.5 mm. 

 wide. — Hammocks. — ( Cuba. ) 



4. VALERIANOIDES Boerh. Herbs, or shrubby plants. Leaf-blades 

 toothed. Flowers sessile on a stout rachis or in excavations. Calyx often 

 unequally 5-lobed, scarcely accrescent. Corolla white or colored, salverform, 

 slightly 2-lipped. Stamens 2. Staminodia 2. 



1. V. jamaicensis (L.) Kuntze. Plants with spreading branches, 6-15 dm. 

 long: leaf -blades oblong, ovate, or oval, 2-8 cm. long: spikes virgate, quill- 

 like: corolla blue, 8-11 mm. long; limb 7-8.5 mm. wide. — Pinelands and coastal 

 sand-dunes. — F. K. {Ber., Bah., Cuba, Ant.) 



5. LANTANA L. Shrubs or rarely herbs, sometimes prickle-armed. 

 Leaf-blades toothed. Flowers in congested, flat-topped spikes. Calyx shal- 

 lowly 2-5-lobed, or truncate. Corolla white or colored: tube slightly curved: 

 limb irregular. Stamens 4. 



Flower-heads involucrate : corolla mainly white. 



Outer bracts of the involucre ovate. 1. L. invoTucrata. 



Outer bracts of the involucre lanceolate or oblong-lanceolate. 2. L. odorata. 

 Flower-heads bracted, but not involucrate : corolla yellow, orange 

 or reddish. 

 Plants with prostrate stems and branches : drupes 2.5-3.5 



mm. long. 3. L. depressa. 



I'lants with erect stems and branches : drupes 4-5 mm. long. 4. L. ovatifolia. 



1. L. involucrata L. Shrub 4-17 dm. tall, with puberulent or tomentulose 

 foliage: leaf -blades oval, obovate, or suborbicular, 1-3 cm. long, usually 

 cuneate at the base: outer bracts of the involucre 4-7 mm. long, ciliolate: 

 calyx becoming 1.5 mm. long: corolla white or pale-purple; tube 2-4 mm. long; 

 limb 2-4 mm. high. — Hammocks. — F. K. {Bah., Cuba, Ant.) 



2. L. odorata L. Similar to L. involucrata in habit: leaves similar but com- 

 monly larger: bracts of the involucre narrower, the outer lanceolate or oblong- 

 lanceolate: flowers often smaller. — Hammocks. — F. K, {Ber., Bah., Cuba, 

 Ant.) 



3. L. depressa Small. Shrub with unarmed prostrate branches, 2-11 dm. long: 

 leaf-blades ovate to elliptic, 1-3.5 cm. long: spikes less than 2.5 cm. wide: 

 corolla-tube 5-6 mm. long: stone of the drupe globose, 2-3 mm. long, scarcely 

 beaked. — Pinelands. 



4. L. ovatifolia Britton. Branches 2 m. tall or less: leaf -blades ovate, 3-7 cm. 

 long, crcnate-serrate: spikes over 2.5 cm. wide: corolla-tube 9-10 mm. long: 

 stone of the drupe ovoid, about 5 mm. long, beaked. — Hammocks. {Bah.) 



