244 MR..A. W. HILL—REVISION OF 
absent and the stamens are arranged in a cylindrical head, probably indicates that these 
three species are more closely allied to each other than to the other species included in 
this group. 
The apparent absence of a beak to the carpels in JV. pedicularifolia (Pl. 30. fig. 16) 
and N. Lorentzii also distinguishes these two species from all others. 
From the geographical point of view they form a fairly close group. N. Philippi 
and JV. rugosa come from the northern part of the Atacama desert, Chili, whilst 
N. Niederleinii and N. Lorentzii are found to the east of this region, over the crest of the 
Andes in the Argentine Republic. NV. pedicularifolim has been collected in the south 
of Bolivia, and extends north-westwards along the western Cordillera to Vincocaya in the 
Peruvian Dept. of Arequipa—the locality for N. argyllioides,—and is also recorded from 
Ananca *, in the province of Sandia, on the borders of Peru and Bolivia. It is curious 
that no localities are recorded for this species on the eastern range of the Cordillera 
between Potosi and Ananca. It is of interest to notice that JV. sulphurea, whose leaf is 
the most distinct and peculiar, also comes from the province of Sandia, which region 
may perhaps be regarded as the northern limit for this subsection. 
N. Hieronymi (Pl. 28. fig. 5) from the Argentine may be cited as a form possibly 
related to N. Philippii, whilst N. lanata (Pl. 29. fig. 18) shows some resemblance both 
to N. argyllioides and to N. pedicularifolia. 
A form similar to N. flabellata (p. 222, Pl. 29. fig. 2) may very well be considered 
to have been the starting-point for such a group of forms as are here brought together. 
The corolla-tube is practically absent in N. flabellata (Pl. 30. fig. 8), in which point it 
resembles N. pedicularifolia and its nearest allies, and in the form of the lamina it 
shows resemblances to N. lanata, N. argyllioides, N. rugosa, and N. Philippi. 
The relationships of the various species therefore appear to be somewhat as 
follows :— 
(44) N. sulphurea. 
(57) N. glawca (?) / (48) N. Lorentzii. 
Di p.283. 7 n 
(42) N. pedicularifolia. 
(38) N. Philippi." 
ia N. flabellata, 
(24) N. lanata. 
i hs (40) N. argyllioides: 
(4) N. Hieronymi (?) (41) N. Niederleinii. 
(v. p. 227). 
(39) N. rugosa. 
With regard to N. pedicularifolia, it may be noticed that N. sulphurea appears to be 
the northern variant, while N. Niederleinii has been developed in the south. N. cinerem, 
s Woberbaner, No. 1023, Ananea, Prov, Sandia, a fragment with a piece of N. obcunzata, both loose in à capsule 
bearing this number (Herb. Mus. Berol.). 
