Literature

Authors	Year	Title
P. Knuth	1905	Heliotropium
Baker, J. G., Wright C. H.	1906	Boragineae
F. Fedde	1906	Novorum generum, specierum, varietatum, formarumque Siphonogamarum Index. Anni 1906
P. van Tieghem	1906	Sur les Heliotropiacées
K. Reiche	1907	Estudios críticos sobre la flora de Chile. Boraginaceae
C. B. Robinson	1909	Philippine Boraginaceae
A. Lingelsheim, Pax, F., Winkler, H.	1909	Plantae Bolivianae. III
K. Reiche	1910	Boraginaceae
D. J. Smith	1910	Undescribed plants from Guatemala and other Central American Republics. XXXIII
J. F. Macbride	1916	Certain Boraginaceae, new or transferred
J. F. Macbride	1917	Further notes on the Boraginaceae
I. M. Johnston	1928	Studies in the Boraginaceae VII. The South American species of Heliotropium
I. M. Johnston	1929	The coastal flora of the departments of Chañaral and Taltal
I. M. Johnston	1929	The flora of the Nitrate Coast
I. M. Johnston	1930	Studies in the Boraginaceae VIII. I. Observations on the species of Cordia and Tournefortia known from Brazil. 3. Treatment of Tournefortia
I. Murray Johnston	1931	The flora of the Revillagigedo Islands
I. M. Johnston	1932	New records for the flora of the Nitrate Coast
A. C. Brade	1932	Os gêneros Cordia e Tournefortia
J. Kunkel Small	1933	Manual of the southeastern flora
C. Gijsbert G. van Steenis	1934	Heliotropium elongatum Hofm. in Java
I. M. Johnston	1935	Studies in the Boraginaceae XI. 1. The species of Tournefortia and Messerschmidia in the Old World
I. M. Johnston	1935	Studies in the Boraginaceae X. The Boraginaceae of Northeastern South America
I. M. Johnston	1937	Studies in the Boraginaceae XII. 2. Novelties and critical notes
J. Ruth Lawrence	1937	A correlation of the taxonomy and the floral anatomy of certain of the Boraginaceae
P. C. Standley	1938	Boraginaceae in Flora of Costa Rica
A. Pitot	1938	Le développement de l'ovaire d'Heliotropium europæum L.
I. M. Johnston	1939	Studies in the Boraginaceae, XIII. New or otherwise noteworthy species, chiefly from western United States
J. Ewan	1942	A review of the North American weedy Heliotropes
C. L. Lundell	1942	Undescribed plants from Mexico and Central America
I. M. Johnston	1949	Studies in the Boraginaceae XVIII. Boraginaceae of the southern West Indies
A. E. Ragonese	1950	Una nueva especie de Heliotropium de la flora argentina
I. M. Johnston	1951	Studies in the Boraginaceae XX. Representatives of three subfamilies in eastern Asia
R. Sharma	1954	Floral anatomy of Heliotropium indicum L.
N. Gangui	1955	Las especies silvestres de Heliotropium de la República Argentina
I. M. Johnston	1957	Boraginaceae. in: Steyermark. J. A. and collaborators: Contributions to the flora of Venezuela
I. M. Johnston	1959	Some noteworthy American Borages
J. F. Macbride	1960	Flora of Peru: Boraginaceae
H. Heine	1963	Boraginaceae
R. L. Pérez-Moreau	1963	Una nueva especie de Heliotropium de Neuquén (Boraginaceae)
I. M. Johnston	1964	Boraginaceae
R. L. Pérez-Moreau	1964	Nota sobre dos Heliotropium argentinos (Boraginaceae)
G. Dawson	1965	Boraginaceae
P. Munz, Keck D.	1965	A California flora
T. Rjagopal, Ramayya N.	1966	On the taxonomy of the genus Heliotropium L., from Hyderabad with a revised key to the South Indian species
T. E. di Fulvio	1969	Recuentos cromosómicos en Heliotropium (Boraginaceae)
A. Graham, Jarzen D. M.	1969	Studies in neotropical paleobotany. I. The Oligocene communities of Puerto Rico
D. N. Gibson	1970	Boraginaceae in Flora of Guatemala - part IX, numbers 1 and 2.
D. S. Correll, Johnston M. C.	1970	Manual of the vascular plants of Texas
A. Taton	1971	Boraginaceae
E. F. Guimarães, Barroso, G. M., Falcão-Ichaso, C. L., A. Bastos, R.	1971	Flora da Guanabara: Flacourtiaceae, Olacaceae, Boraginaceae

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