Studies on the Araceae, III. 
BY 
DOUGLAS HOUGHTON CAMPBELL, 
Professor of Botany in the Stanford University , Calif ornia, U.S.A. 
With Plates XIV, XV, XVI, and XVII. 
D URING the summer of 1899 the writer obtained good series of several 
species of Araceae from the very large collection cultivated at Kew. 
Some of the results obtained from the study of these collections have 
already been published in previous papers 1 . The present contribution 
to the study of these plants is concerned mainly with a study of the 
embryo-sac and embryo of two species — Anthurium violaceum , Schott, var. 
leucocarpum , and Nephthytis Liberica , Schott. These investigations have 
yielded several somewhat important additional facts bearing upon the 
development of these interesting plants. 
Anthurium violaceum, Schott, var. leucocarpum. 
The genus Anthurium is a large one, comprising some 200 or more 
species distributed through the American tropics. The showy foliage 
of certain species, and the brilliantly coloured spathes of others, have made 
them favourite ornaments for the greenhouse and conservatory. In the 
damp forests of the West Indies and in Central and South America species 
of Anthurium are among the most conspicuous plants that one encounters. 
In a previous paper 2 some notes upon the endosperm of Anthurium 
based upon material collected in Jamaica were published, but owing to the 
material being imperfectly preserved it was impossible to trace out its 
development. Among the numerous species grown at Kew, several were 
collected, among them a small species, A. violaceum , var. leucocarpum , hort., 
which was flowering and fruiting freely, so that a very complete series of 
stages could be collected. These were prepared as carefully as possible, 
and yielded very satisfactory results. 
1 Campbell, Studies on the Araceae, I : Annals of Botany, xiv, March, 1900 ; II : Annals of 
Botany, xvii, September, 1903. 
2 Loc. cit., I. 
[Annals of Botany, Vol. XIX. No. LXXV. July, 1905.] 
A a 
