ed. 2 (1952) 283, t. 143), on the basis of the collection 
described above. 
Brazit: Estado do Amazonas, Upper Rio Negro Basin, Ira-Igarapé, 
affluent of Rio Tikié, Porto Maktis, June 25, 1948, Richard Evans 
Schultes & Francisco Lopez 10184 (Tyrer in Herb. Gray). 
EUPHORBIACEAE 
Senefelderopsis Steyermark ex Schultes in Bot. 
Mus. Leafl. Harvard Univ. 15 (1951) 45. 
Senefelderopsis chiribiquetensis (Schultes & 
Croizat) Steyermark ex Schultes ibid. 47. 
Senefelderopsis Croizatii Steyermark ex Schultes 
ibid. 46, t. 16. 
Through an editorial error, the generic and specific 
descriptions cited above were published under the family 
heading Anacardiaceae. The genus is a member of the 
Luphorbiaceae. 
STERCULIACEAE 
Recent investigations of Herrania in the field and 
herbarium have led to several additions to our knowledge 
of this interesting sterculiaceous genus. 
‘To the best of my knowledge, the first analysis of the 
pollen-grains of Herrania is that effected by Dr. Thomas 
van der Hammen of the Servicio Geol6gico Nacional de 
Colombia and published herewith. The species studied 
was Herrania tomentella which is described in this paper. 
Herrania tomentella R. E, Schultes. 
Pollen collection Serv. Geol. Nac. IV 86. Collection Col, 34377. 
Pollen grains: tricolporate, reticulate, subsphaeroidal; granulae of 
the muri visible but not separated. Lumina of reticulum +irregular 
of size, rather large, polygonal, smaller near the colpae. In the 
lumina, rather faint granulae are visible. 
Colpae clear, edges separated; pores clear, without ectexine ele- 
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