52 



this name in the Buitenzorg Herbarium. This herb is not yet mentioned 

 in the Flora of M i q u e 1 and could therefore not be determined by 

 Treubor Burck. Probably it was introduced into Java about the 

 middle of the 19th century 1 ), possibly from tropical America; at 

 present it is spread throughout the island from the plains up to an 

 altitude of 2650 m- It chiefly occurs in sunny or slightly shadowed 

 fields and does not require a fertile soil; it often grows gregariously 

 on exhausted or washed-off soils or on vertical banks clothed with 

 kremnophytes. In the surroundings of Batavia it is rather common in 

 several localities. I think it quite possible that the second Conyza of 

 I r e u b was identical with this plant. 



4. Senecio spec. 



The only species of Senecio -) occurring in the lower regions of the 

 Dutch East Indies is the violet-flowered Senecio sonchifo/ius Moenc/i. 

 This is in Java from the plains up to an altitude of rt 1 750 m. in many 

 localities a rather common weed of fields and road-sides; in 1897 it 

 was collected on the north-western side of Krakatao. This species, 

 recorded by De Candolle (Prodromus VI, 302) and by M i q u e I 

 (Flora Ind. Bat. II, 101) under the genus Emilia, may have been found 

 by Treub in 1886 but I do not think so. Senecio sonchifo/ius so 

 little resembles the European species of the genus, some of which 

 were doubtless known to Treub, that I cannot believe that the 

 latter, who was no systematist and had to rely on M i q u e 1, 

 reckoned it to Senecio, contrary to the opinion of De Candolle 

 and Miquel. I think it much more probable that he has found 

 Erec/ithites hieracifolia Rjfin., an American weed of agriculture 

 introduced already long ago ') and at present frequent in many not 

 too dry localities of Java and Sumatra, from the plains up to an 

 altitude of 2100 m. but not yet mentioned in Miquel's flora. It 

 somewhat resembles Senecio and was collected in 1906 at Zwarte 

 I lock, the same side of the island as investigated by Treub. 



Both Senecio sonchifo/ius and Erechthites hieracifolia occur in the 

 surroundings of Batavia and Tandjong Priok. The fruits of both possess 



') This now very common plant is not mentioned by | unghuhn and seems not 

 to have been found by any of the older collectors As far as I know Otto Kuntze 

 was the first who found it in |ava (1875). 



-) The plant mentioned by Ko orders (Exkursionsflora 111,345) for the lower 

 legions of |ava under the name of Senecio tenuifolius Burm. does not belong to this 

 genus but is a Chrysantliel/um. The statement on the same page that Senecio 

 araneosus D. C. occurs in the plains of |ava is incorrect; this species is restricted to 

 the mountainous zone above 1000 m. as is the introduced Senecio vulgaris I.. Other 

 species of the genus have not yet been found in |ava. 



