NOPALEA LUTEA, A NEW CACTUS FROM GUATEMALA. 
By J. N. Roser. 
In October, 1907, IT described * Vopalea quatemalensis, which was 
then supposed to be the only endemic species of the genus in Guate- 
mala. In December of the same year Prof. W. A. Kellerman wrote 
me from El] Rancho that he had discovered there a second species. 
Abundance of material was collected, which, after the lamentable 
death of Professor Kellerman, was sent to Washington by his assist- 
ants, Mr. H. E. Barber and Mr. J. F. Zimmer. 
Nopalea lutea Rose, sp. nov. PLATE LVIIT. 
Probably arborescent, joints obovate to spatulate, 1 to 1.5 cm. Jong; areoles 
about 2 cm. apart, large, made up of a prominent cushion of short hairs filled 
with numerous yellow spines and bristles; spines weak, usually about 2 em. 
long; flower 5 cm. long; petals red, 2 cm. long; ovary covered with prominent 
areoles filled with weak yellow spines and bristles. 
Collected by Prof. W. A. Kellerman and assistants, near El Rancho, Guate- 
mala, altitude 800 meters, December 28, 1907 (no. 7046). 
This species is very unlike the other known Nopaleas in having weak spines. 
Professor Kellerman says it differs from N. guatemalensis in having a honey- 
yellow green color instead of gray green. The flowers are smaller and of a 
lighter red color. 
Type U. S. National Herbarium no. 535175. 
EXPLANATION OF PLATE LVIII.—Two individuals. From photographs taken by Pro- 
fessor Kellerman. 
* Smithson. Misc. Coll. 50: 330. 1907. 
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