118 LAMIACEAE. 



cymes. Calyx of 5 nearly distinct sepals. Corolla of 4 partially united 

 petals, campanulate-rotate. Androecium of 4 stamens, the filaments 

 adnate to the lower part of the corolla-tube. Gynoecium of 2 united 

 carpels. Fruit a compressed oblique capsule. 



1. AVICENNIA L. Leaf-blades thick. Cymes peduneled. Calyx sub- 

 tended by small bracts. Corolla inconspicuous, the tube and spreading lobes 

 about equal in length. Stamens erect. Stigmas 2. Capsule thick-walled. 



1. A. nitida Jacq. Shrub, or tree sometimes 25 m. tall: leaf -blades leathery, 

 oblong or nearly so, 3-8 cm. long, dark-green above, pale, minutely canescent 

 beneath: calyx 34 mm. long: corolla white; lobes longer than the tube, 

 broadly rounded or retuse : fruit oblong or elliptic, 3-5 cm. long, acutish. 

 BLACK-MANGROVE. 



Sandy shores and coastal hammocks, pen. Fla., the E. Keys and F. Keys. (Cont., 

 W. I.) 



FAMILY 7. LAMIACEAE. MINT FAMILY. 



Herbs or woody plants, often aromatic. Stems 4-sided. Leaves 

 opposite or whorled : blades simple, entire, toothed, or lobed Flowers 

 perfect, in open or compact cymes. Calyx of 5 partially united sepals, 

 regular or 2-lipped. Corolla of 5 partially united sepals, 2-lipped or 

 nearly regular. Androecium of 2-4 stamens, the pairs often irregular. 

 Gynoecium 2-carpellary. Ovary 4-celled. Fruit of 4 nutlets included in 

 the calyx. 



Corolla-tube much bent. 1. CONRADINA. 

 Corolla-tube straight. 



Calyx with 5 nearly equal lobes, not 2-lipped. 2. PYCNOTHYMUS. 



Calyx 2-lipped. 3. CLINOPODIDM. 



1. CONBADINA A. Gray. Shrubs, sometimes diffuse. Leaf-blades nar- 

 now, entire. Flowers in lax axillary cymes. Calyx 2-lipped, the upper lip 

 with 3 broad lobes, the lower lip with 2 narrow lobes. Corolla purplish, 2-lipped : 

 upper lip broad: lower lip with 3 broad lobes, the middle lobe broadest. 

 Stamens 4, exserted. 



Foliage canescent : leaves less than 1 cm. long : upper corolla-lip rounded. 



1. G. canescens. 

 Foliage puberulent : leaves over 1 cm. long : upper corolla-lip retuse. 2. G. puberula. 



1. 0. canescens (T. & G.) A. Gray. Plants 2-4 dm. tall: leaf -blades linear, 

 mainly 5-9 mm. long: calyx becoming 5-6 mm. long, villous: corolla 13-15 mm. 

 long; middle lobe of the lower lip reniform. 



Sand-dunes, w. Fla. (Cont.) Spr.-sum. 



2. 0. puberula Small. Plants 3-7 dm. tall: leaf -blades narrowly linear, mainly 

 12-25 mm. long: calyx becoming 6-7 mm. long, puberulent: corolla 12-15 mm. 

 long; middle lobe of the lower lip cuneate-flabellate. 



Pinelands and sand-hills, e. and pen. Fla. (Endemic.) Spr.-sum., or all year. 



2. PYCNOTHYMUS Small. Shrubs. Leaf-blades narrow, entire. Flowers 

 in dense raceme-like panicles. Calyx slightly irregular, the upper lip with 3 

 narrow lobes, the lower lip with 2 longer lobes. Corolla 2-lipped: lower lip 

 3-lobed, the middle lobe slightly larger than the lateral ones. 



1. P. rigidus (Bart.) Small. Plants 1-7 dm. tall, hirsute: leaf -blades lanceo- 

 late, 5-12 mm. long: calyx 2.5-3 mm. long; lobes lanceolate to oblong-lanceo- 

 late : corolla light -purple, 7-8 mm. long ; lobes rounded. 

 Pinelands, s. pen. Fla. (Endemic.) 



