GENTIANACEAE ~ 307 
GENTIANACEAE 
EXACUM Linnaeus 
Exacum albens Blanco FI. Filip. (1837) 58; ed. 2 (1845) 39; ed. 3, 1 
(1877) 71, t. 202, non Linn. f.=EXACUM CHIRONIOIDES Griseb. 
Cobamba blancoi Azaola in Blanco FI. Filip. ed. 2 (1845) 591 (sp. nov.) ; 
ed. 3, 2 (1878) 293 =EXACUM CHIRONIOIDES Griseb. 
Exacum albens Blanco was reduced by Fernandez-Villar, Novis. 
App. (1880) 136, to Exacum chironioides Griseb. Gen. Sp. Gent. 
(1839) 109, which was based on Philippine material; in this re- 
duction he was undoubtedly correct. Hallier f., Beihefte Bot. 
Centralbl. 342 (1916) 42, has shown that the Malayan form 
is distinct from Hxacum tetragonum Roxb., and has accepted 
Exacum albens Blanco (non Linn.) as the name for the former ; 
Exacum albens Blanco is invalidated by LE. albens Linn. 
Cobamba blancoi Azaola was reduced by Fernandez-Villar to 
Canscora decussata R. & S., following Llanos, but this is certainly 
incorrect for the latter species does not extend to the Philippines. 
The description is very imperfect, but so far as it goes it applies 
to Exacum chironioides Griseb., but to no other Philippine plant 
known to me. It is widely distributed in the Philippines, in 
rather wet grasslands, along streams, etc., in the provinces near 
Manila, flowering from April to September. 
Illustrative specimen from Antipolo, Rizal Province, Luzon, 
August, 1913 (Merrill: Species Blancoanae No. 261). 
CANSCORA Lamarck 
Cehamye dichotoma Blanco Fl. Filip. (1887) 510 (gen. et sp. nov.); ed. 
2 (1845) 355; ed. 3, 2 (1878) 298—CANSCORA DIFFUSA (Willd.) 
R. Br. 
This species is of local occurrence in the Philippines but is 
rather widely distributed in the Archipelago at low and medium 
altitudes, growing in damp shaded places about cliffs, along small 
streams, etc. It is the type of the genus Cobamba of Blanco. 
Illustrative specimen from Antipolo, Rizal Province, Luzon, 
November, 1914 (Merrill: Species Blancoanae No. 115). 
LIMNANTHEMUM Gmelin 
Menyanthes indica Linn.; Blanco Fl. Filip. (1837) 87; ed. 2 (1845; 63; 
ed. 3, 1 (1877) 118=LIMNANTHEMUM INDICUM (Linn.) Griseb. 
Fernandez-Villar referred the form that Blanco described to 
Limnanthemum cristatum Griseb., Blanco’s material being from 
Lake Bay, Luzon. Both Limnanthemum indicum Griseb. and 
L. cristatum Griseb. grow in the lake, and from Blanco’s descrip- 
tion of the leaves as a “pie y medio de didmetro,” it is very 
