362 BOBAGINACEAE. 



2. Toumefortia poliochros Spreng. Syst. 1 : 644. 1825. 



A canescent slender woody vine 2 m. long or lesSj or sometimes shrubby. 

 Leaves lanceolate to ovate, 3-7.5 cm. long, thin, acuminate or acute at the 

 apex, narrowed or obtuse at the base, rather dark green and densely appressed- 

 pubeseent above, densely white-pubescent beneath, the petioles 5-15 mm. long; 

 inflorescence rather short-pedTineled, of few or several slender secund spikes 

 3-7 cm. long; calyx 1-1.5 mm. long, pubescent, its lobes lanceolate or ovate- 

 lanceolate; corolla 2-3 times as long as the calyx, pubescent, its lobes lance- 

 olate, acute or acuminate; anthers included; fruit depressed, 3-4 mm. broad, 

 of 4 rounded nutlets or fewer. 



Scruh-lands, Bleuthera, Cat Island, Fortune Island, Great Eaggedi Island : — 

 Cuba ; Hispaniola ; Jamaica. Referred to T. tomentosa Mill. In Bull. N. Y. Bot. 

 Gard. 5 : 317. White-leaved TouBNEFOiiriA. 



3. HELIOTEOPIUM [Tourn.] L. Sp. PI. 130. 1753. 



Herbs or shrubs, with alternate mostly entire leaves, and small blue or 

 white flowers, in scorpioid spikes, or scattered. Calyx-lobes or segments lance- 

 olate, ovate, or linear. Corolla salverform or funelform, naked in the throat, its 

 tube cylindic, its lobes imbricated, plicate or indnplicate in the bud. Stamens 

 included; filaments short, or none. Stigma conic or annular. Fruit 2— 4-lobed, 

 separating into 4, 1-seeded nutlets, or into 2, 2-seeded carpels. [Greek, sun- 

 turning, i. e., turning to or with the sun.] About 125 species, widely dis- 

 tributed. Type species: Seliotropium europaeum L. 



Nutlets conic, strongly ribbed, united in pairs ; flowers pale blue. 1. H.iniicum. 

 Nutlets subglobose or OYOld, smooth or rugose ; flowers white or 

 nearly white. 

 Nutlets united in pairs. 2. H. parviflorum. 



The four nutlets separating. 



Plants glabrous, fleshy. 3. H. curassavicum. 



Plants pubescent. 



Annual ; flowers spicate. 



Leaves obtuse. 4. H. inundatum. 



Leaves acute or short-acuminate. 5. H. Mggersil. 



Perennials. 



Flowers short-spicate ; low shrub. 6. B.tematum. 



Flowers solitary in the axils ; depressed peren- 

 nials. 

 Plants densely covered with appressed white 

 hairs. 

 Leaves imbricated.' 



Leaves oblong or elliptic. 7. H. nanum. 



Leaves lanceolate. 8. H. inaguense. 



Leaves scattered, linear. 9. H. diffusum. 



Plant loosely strigose. 10. H. NashU. 



1. Hellotropium indicum L. Sp. PI. 130. 1753. 



Annual, hirsute or hispid; stem 3-9 dm. high. Leaves ovate or oval, ob- 

 tuse, rounded or subcordate at the base, 5-15 cm. long, repand or nndulate- 

 margined, petioled; flowers blue, 4r-& mm. broad, sessile in terminal dense 

 braetless, usually solitary, scorpioid spikes; calyx-segments acute, shorter than 

 the strigose corolla- tube ; style very short, deciduous; fruit deeply 2-lobed, 

 glabrous, about 2.5 mm. long. 



Waste and cultivated grounds'. New Providence, near Nassau : — Florida, the West 

 Indies and continental tropical America. Naturalized from the Old World tropics. 

 Indian Heliotrope. 



2. Heliotropium parviflorum L. Mant. 2: '201. 1771. 



Annual, or sometimes of longer duration, loosely pubescent, branched, 3-8 

 dm. high, or vine-like and 1 m. long. Leaves oblong-lanceolate to elliptic, 7 



