164 PROCEEDINGS OF THE ACADEMY OF [May-Oct., 



Moist open soil, along trails and in towns, at altitudes of 500 to 

 600 meters, Tropical zone; introduced from Oriental Region of 

 Old World Tropics. 



Cundinamarca. Melgar (moist loam, open slope, along trail, 

 alt. 500-600 m.), Pennell 2878, 2879 [form smaller throughout]. 



Meta. Villavicencio (streets and yards, alt. 525 m.), Pennell 

 1527. 



2. Torenia thouarsii (Cham. & Schlecht.) Kuntze. 



Nortenia thouarsii Cham. & Schlecht. in Linnaea 3 : 18. 1828. "In Brasiliae 

 provincia'Rio Janeiro in uliginosis post Botafoginam . . . legit Bey- 

 rich, in insulis Madagascaria et Mauritii Depetit Thouars. 

 Willd. Hb. n. 11,547 (planta madagascariensis a Thouarsii comm.)." 



Torenia nortenia Steud., Nom., ed. II. 2: 692. 1841. 



Torenia thouarsii (Cham. & Schlecht.) Kuntze, Rev. Gen. 468. 1891. 



This has usually been known as Torenia parviflora Ham. 



Moist banks, in edge of forest, at an altitude of 500 meters, Trop- 

 ical zone; wide-spread through lowland tropical South America, 

 growing as if a native plant. However, as this American plant ap- 

 pears to be indistinguishable from the plant of the Old World, and 

 the remaining species of the genus are all Palaetropic it appears 

 nearly certain that our plant is an introduction. From the Ethi- 

 opian and Oriental regions of the Old World Tropics. 



Meta. Villavicencio (moist shaded bank near Rio Guatiquia, 

 alt. 500 m.), Pennell 1528, (moist meadow and swamp in forest, 

 near Rio Guatiquia, alt. 500 m.), Pennell 1560. 



2a. Torenia thouarsii nivea Pennell, var. nov. 



Leaves smaller, 1.2-1.5 cm. long, crenate-serrate, rather than 

 dentate. Corolla white throughout. Probably a color-form iden- 

 tical with plants of the Old World Tropics and introduced there- 

 from. 



Type, wet sand along Rio Guatiquia, altitude 500 meters, col- 

 lected in flower and fruit August 30, 1917, F. W. Pennell 1531; in 

 herbarium New York Botanical Garden. 



15. ILYSANTHES Rafinesque. 

 Ilysanthes Raf., Ann. Nat. 13. 1820. 

 Type species, I. riparia Raf., of the Ohio. 



1. Ilysanthes inaequalis (Walt.) Pennell. 



Gratiola inaequalis Walt., Fl. Carol. 61. 1788. [South Carolina.] 

 Ilysanthes inaequalis (Walt.) Pennell in Torreya 19: 149. 1919. 



Wet soil near streams, at an altitude little above sea -level, Trop- 

 ical zone, in Magdalena. Probably wide-spread, and also in the 



