eus, deflexus, obtusus. Ovula 4-6. Semina adhuce ignota. 
[ have chosen the specific epithet because, according 
to the three collectors of the material cited below, this 
little shrub is anchored so firmly by its fibrous roots in 
the cracks of the bare sandstone where it grows that it 
could not be collected with the roots but had to be cut 
off at the surface of the ground. 
Cotompra: Comisaria del Vaupés, Mesa La Lindosa, 15-20 km. de 
San José del Guaviare. Alt. 400-600 m. December 13-15, 1950, 
Jesis M. Idrobo & Richard Evans Schultes 640 (Tyre in Herb. Gray ).— 
Comisaria del Vaupés, San José del Guaviare. Alt. 270 m. November 
12, 1939, J. Cuatrecasas 7691. 
Cuphea annulata Woe/ne in Martius FI. Bras. 13, 
pt. 2 (1877) 304, t. 56, fi 5. 
Although the type of this species bears a label report- 
ing the ‘‘calyx coccineus, ’ and the collection cited below 
states ‘‘flowers basally green-yellow, remainder (about 
3 of length) red,’ their identity is unquestionable. 
The petals and stamens are red. The ovules are five, 
reducing to two or three seeds at maturity. As Koehne 
did not see the seeds, having only the type material, it 
seems to me advisable to describe them: 
Seeds dark brown, complanate-suborbiculate (+ 8 
mm.), slightly marginate, border somewhat concave at 
the place of the caruncle, apex broadly retuse, surface 
finely foveolate. 
The type of Cuphea annulata was collected in 1820 by 
Martius at Araracuara on the Rio Caqueta in Colombia, 
not from Brazil nor from the Rio Negro as stated on the 
label: ‘‘Alto Amazonas, Rio Negro bei Araracoara.”’ It 
is of interest to note that the locality of Schultes & Ca- 
brera 17509 is an isolated mountain not far in a straight 
line from Araracuara and belonging geologically to the 
same formation. The species is one of the characteristic 
endemics of the ancient cretaceous sandstone Venezuela- 
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