1014 VERBENACEAE 
in each cavity. Fruit drupe-like, with a more or less watery pulp. Nutlets 2-celled or 
separating into 2 one-seeded nutlets. The plants flower throughout the year. 
Flower-heads bracted, but not involucrate, 3 
Leaf-blades cuneate to rounded at the base, rather finely crenate-serrate. 1. L. Camara. 
Leaf-blades truncate or cordate at the base, coarsely crenate or serrate-crenate. 2. L. horrida. 
Flower-heads decidedly involucrate. 
Leaf-blades acute or acutish, coarsely toothed : corolla-tube about 10 mm. long. 3. L. Sellowiana. 
Leaf-blades rounded or retuse at the apex, crenulate: corolla-tube 2-4 mm. long. 
Outer bracts of the involucre ovate. 4. L. involucrata. 
Outer bracts of the involucre lanceolate or oblong-lanceolate. 5. L. odorata. 
l. Lantana Camàra L. A branching shrub 1-1.5 m. tall, rigid-pubescent, unarmed, 
or prickly. Leaf-blades ovate to oblong-ovate, 4-12 cm. long, obtuse, acute, or short- 
acuminate, finely crenate-serrate, rounded or narrowed at the base: bracts oblong to 
lanceolate, 4-7 mm. long: calyx very thin, 3 mm. long: corolla yellow or orange ; tube 
about 1 cm. long, puberulent, slightly curved, barely enlarged above the middle ; limb 6-8 
mm. high. 
In sandy soil, Georgia to Florida and Texas. Also in tropical America. 
2. Lantana hórrida H.B.K. A branching shrub mostly 1-2 m. tall, more or less 
prickly and hirsute. Leaf-blades ovate to orbicular-ovate or deltoid-ovate, 2-7 cm. long, 
obtuse or acute, coarsely crenate or serrate-crenate, truncate or cordate at the base: bracts 
narrow: calyx about 2 mm. long: corolla deep yellow or orange-red ; tube 7-9 mm. long, 
enlarged above the middle ; limb 7-8 mm. high. 
In sandy soil or thickets, Gulf States, Mexico and Central America. 
3. Lantana Sellowiàna Link & Otto. A branching shrub 3-18 dm. tall, with 
tomentulose foliage. Leaf-blades ovate, oval or elliptic-ovate, 1-3 cm. long, acute or 
acutish, relatively coarsely crenate, abruptly narrowed or truncate at the base; petioles 
generally winged below the blade: bracts of the involucre ovate or oblong-elliptic, ciliate, 
5-6 mm. long: calyx 1 mm. high: corolla magenta or lilac; tube about 1 em. long, puber- 
ulent ; limb 8-10 mm. high, the lower lobe much longer than the others. 
In waste places, pine lands and thickets, Florida. Common in tropical America. 
4. Lantana involucràta L. A much-branched shrub 4-17 dm. tall, with puberulent 
or thickly tomentulose foliage. Leaves sometimes clustered in the axils ; blades oval, obo- 
vate to suborbicular, 1-3 cm. long, rounded or retuse at the apex, finely crenate, usually 
cuneately narrowed at the base : outer bracts of the involucre ovate, 4-7 mm. long, cilio- 
late : calyx becoming 1.5 mm. long : corolla white, puberulent ; tube 2-4 mm. long, slightly 
enlarged at the middle ; limb 2-4 mm. high, the lower lobe the largest. 
In sandy soil, pine lands and open hammocks, Florida. Also in tropical America. 
5. Lantana odorata L. Similar to L. involucrata in habit. Leaves similar, but 
commonly larger: bracts of the involucre narrower, the outer lanceolate or oblong-lanceo- 
late. [L. involucrata var. Floridana Chapm.] 
In pine lands and hammocks, peninsular Florida. Also in tropical America. 
10. CITHARÉXYLUM L. : 
Evergreen shrubs, sometimes armed with axillary spines. Leaves opposite, without 
stipules. Flowers small, in axillary or terminal racemes. Pedicels subtended by minute 
persistent bracts. Calyx membranous: tube narrowly campanulate, minutely 5-lobed, per- 
sistent. Corolla mostly white, salverform: tube symmetrical: limb slightly oblique : 
lobes 5, nearly equal. Stamens 4, adnate, like the staminodium, to the corolla-tube below 
the middle : filaments filiform-subulate: anthers introrse. Ovary sessile, incompletely 4- 
celled by the development of 2 parietal placentae. Stigma 2-lobed. Ovules solitary, as- 
cending, anatropous. Drupe berry-like, subtended by the persistent calyx, with a fleshy pulp 
and a thick bony stone which separates into 2 flattened 2-seeded nutlets. Seeds elongated» 
with a membranous testa. Endosperm wanting. 
a : : -li : 1. C. brachyanthum. 
i-i ee ease Dui Mmm t Cnm 
1. Citharexylum brachyánthum A. Gray. A much branched shrub, with pibe c 
foliage, the branchlets 4-angled: leaves few, often clustered ; blades linear-spatu qo 
cuneate or obovate, 6-12 mm. long, obtuse, nerveless, sessile or nearly so, on ar ent 
bases becoming spinescent : flowers clustered on short spur-like branches: calyx pu tate 
nearly 4 mm. long; lobes 5, low : corolla white; tube about 4 mm. long, campanu **» 
lobes rounded, shorter than the tube: fruit subglobose, 6 mm. in diameter. 
On dry plains or hillsides, southern Texas. 
