158 HELIOTEOPIACEAE. 



1. S. Sebestena (L.) Britton. Shrub or small tree, the twigs strigose; leaf- 

 blatles ovate or oblong-ovate, 8-12 em. long, undulate or repand: calyx 14-19 

 mm. long; tube eylindric: corolla-lobes much shorter than the tube: fruits 

 oval or ovoid, 2-3 cm. long. — Coastal hammocks and sand-dunes. — F. K. 

 {Bah., Cuba, Ant.) — Geiger-tree. 



2. BOUE.REBIA P. Br. Shrubs or trees. Flovrers in corymbose cymes. 

 Sepals united to above the middle. Corolla white or colored, prominently 

 lobed. Filaments adnate to above or below the middle of the corolla-tube. 



Drupes 0-11 mm. wide: corolla-tube much exceeding the calyx. 1. B. revoluta. 

 Drupes 7-8 mm. wide : corolla-tube about equalling the calyx or 



slightly longer. 2. B. casslnifoUa. 



1. B. revoluta H.B.K. Shrub or small tree: leaf -blades oblong to obovate, 

 mostly 2-7 cm. long, abruptly pointed, rounded, or notched, smooth or 

 rough-pubescent and ciliate: cymes several-flowered: calyx 6-7 mm. long; 

 lobes ovate, mostly less than ^ as long as the tube: corolla white; tube much 

 exceeding the calyx; larger lobes 5-6 mm. wide: anthers about 2..5 mm. long: 

 drupes orange, slightly depressed, 9-11 mm. wide. — Pinelands. — F. K. {Cuba, 



Ant.) ROUGH-STRONGBACK. 



2. B. cassinifolia (A. Eich.) Griseb. Shrub or small tree: leaf -blades oval, 

 elliptic, obovate, or cuneate, 1-2. .5 cm. long, mostly obtuse or retuse, smooth, 

 glabrous, and eciliate, at least at maturity slightly veiny in age: cymes few- 

 flowered: calyx 5-6 mm. long; lobes triangular to ovate-triangular, f, as long as 

 the tube: corolla white; tube about as long as the calyx or slightly exceeding 

 it; larger lobes about 4 mm. wide: anthers about 2 mm. long: drupes much 

 depressed, 7-8 mm. wide. — Pinelands.— (C'M&a). Smooth-strongback. 



Family 7. HELIOTEOPIACEAE. Heliotrope Family. 



Herbs, shrubs, or woody vines. Leaves alternate : blades entire, or 

 rarely toothed. Flowers perfect, mostly in scorpioid spikes or racemes. 

 Calyx of 5 more or less united sepals. Corolla various, of 5 partially 

 united petals. Androecium of 5 stamens, the filaments more or less adnate 

 to the corolla-tube. Gynoeeium 2-^-earpellary. Stigma annular, sur- 

 mounted by an appendage. Fruit drupaceous, or dry and of 2— i nutlets. 



Shrubs, trees or woody twiners : fruit drupaceous. 1. Todrnefortia. 



Herbs or shrubby herbs : fruit dry, separating into nutlets. 2. Heliotropiom. 



1. TOURNEFORTIA L. Plants erect or climbing. Sepals well united 

 (ours). Corolla white or pale. Stamens adnate to near the top of the corolla- 

 tube. Fruit drupaceous. 



1. T. gnaphalodes (Jacq.) R. Br. Fleshy shrub, .3-18 dm. tall, the pubescence 

 white or whitish: leaf-Vjlades linear-spatulate, 4-10 cm. long: calyx-lobes shorter 

 than the tube: corolla-lobes 2-.3 mm. long: fruit ovoid, about 5 mm. long. — 

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



2. HELIOTROPIUM [Tourn.] L. Plants erect, diffuse or prostrate. 

 Sepals nearly distinct. Stamens adnate to the lower part of the corolla-tube. 

 St3ie very short. Fruit 4-lobed, an aggregate of 4 nutlets. — IIeliotuope. 



Inflorescence bractless : corolla white: plants annual. 1. II. parviflorum. 



Inflorescence bracted : corolla yellow: plants ppronniiil. 



Plants with erect branches : corolla-lobes ovate, obtuse : 



flowers inodorous. 2. H. Lcavcnworthii. 



Plants with radially prostrate branches : corolla-lobes del- 

 toid, acute : flowers fragrant. 3. H. horizontalc. 



