374 BORAGINE. 
7. HELIOTROPIUM. 
Heliotropium, Linn. Gen. Plant. n. 179; Benth. et Hook. Gen. Plant. 11. p. 843. 
Herbs, under-shrubs, rarely quite shrubby. Nearly 150 species have been described ; 
and there are probably above 100 distinct ones. ‘They are widely dispersed in tropical 
and subtropical countries. 
1. Heliotropium americanum, Mill. Dict. n. 11; DC. Prodr. ix. p. 549. 
Mexico, Vera Cruz. 
2. Heliotropium angustifolium, Torr. Bot. U.S. & Mex. Bound. Surv. p. 187; 
A. Gr. Synop. Fl. N. Am. ii. p. 184. 
Trxas.—NortH Mexico, near Monterey (Eaton & Edwards; Palmer, 878); Caracol 
Mountains, twenty-five miles south-east of Monclova (Palmer, 879, 880). Hb. Kew. 
3. Heliotropium campechianum, H. B. K. Nov. Gen. et Sp. iii. p. 86; DC. 
Prodr. ix. p. 546. 
SoutH Mexico, Campeachy (Humboldt & Bonpland). 
4, Helitropium confertifolium, Torr.; A. Gr. Synop. Fl. N. Am. ii. p. 184. 
Heliotropium limbatum et H. limbatum confertifolium, “Torr. Bot. U.S. & Mex. Bound. Surv. p. 138, 
non H. limbatum, Benth. 
Texas.—NortH Mexico, Monterey (Eaton & Edwards), Murin (Thurber), Soledad, 
twenty-five miles south-west of Monclova (Palmer, 890). Hb. Kew. 
5. Heliotropium convolvulaceum, A. Gr: in Mem. Amer. Acad. vi. p. 408; 
Synop. Fl. N. Am. ii. p. 183. 
Euploca convolvulacea, Nutt. in Trans. Am. Phil. Soc. ser. 2, v. p. 189; Hook. Ic. Pl. p. 651; Torr. 
in Marcy’s Rep. t. 15. 
Nepraska to West Texas and in South-east CaLiIrorniA.—Nortu Mexico, Chihuahua 
(Thurber). 
6. Heliotropium coriaceum, Lehm. in Act. Nov. Nat. Cur. xiv. 2, p. 810; DC. 
Prodr. ix. p. 549. 
MEXIco. 
7. Heliotropium corymbosum, Ruiz et Pav. Fl. Peru. ii. p. 2, t. 107. fig. a; 
DC. Prodr. ix. p. 538; Bot. Mag. t. 1609. 
GuaTEMALA (Bernoulli, 124); CuntraL America, without locality (Barclay).—Co.LomBIa 
to Peru, Guiana, and Brazit. Hb. Kew. 
8. Heliotropium curassavicum, Linn. Sp. Pl. p.188; DC. Prodr. ix. p. 538; 
A. Gr. Synop. Fl. N. Am. ii. p. 185; Bot. Mag. t. 2669. 
OreEconand VIRGINIA southward.—Mexico, Leon(Hartweg), SanLuis Potosi (Schaffner), 
Vera Cruz (Galeotti, 1262), Yotla (Andrieux, 206), valley of Mexico (Bourgeau, 130), 
Cordillera of Oaxaca, 5000 feet (Galeotti, 1258)—West Inpims and southward to 
