28 PROCEEDINGS OF THE AMERICAN ACADEMY. 
place as the later monotypic genus Brachyandra Phil., and there can 
be no doubt that these two plants are congeneric. They are both 
small-leaved glandular-pubescent xerophytic shrubs, with closely sim- 
ilar achenes and pappus, and both possess the peculiar narrowly tubu- 
lar corollas with exceedingly short teeth and no expanded throat. The 
only difference between them which could possibly be regarded asof _ 
generic importance is that the involucre in Helogyne is about 2-seriate 
and of subequal bracts, while in Brachyandra it is about 3-seriate, the 
outer bracts being decidedly shorter. In view of the close correspond- 
ence in floral structure, achenes, leaf-arrangement, etc., this difference — 
in the involucre, which finds frequent parallels within the limits of 
several other genera of the Compositae, seems by no means sufficient 
to warrant keeping these two genera separate. ‘The later name 
proposed by Philippi must of course give way to the earlier one of 
Nuttall ae 
Leto Phil. is a third obscure Chilian xerophytic monotype of this 
affinity. Its generic relationship to Brachyandra was shrewdly sut- 
mised by Dr. 0. Hoffmann (see Engl. & Prantl. Nat. Pflanzen. iv. 
Ab. 5, 334), notwithstanding a misleading statement in the origina 
description to the effect that the corollas were irregular, which is nob 
the case. More recently Reiche, Fl. de Chil. iii. 263 (1902), has for- — 
mally transferred the single species to Brachyandra. While at Be 
the writer had an opportunity to examine an authentic specimen of — 
this plant (Leto tenuifolius Phil., Brachyandra tenuifolia Reiche), and — 
failed to find even specific distinctions between it and the type of Helo- 
gyne apaloidea preserved at the British Museum. It is true that the — 
specimen of Leto at Berlin shows some leaves much more deeply lobed 
than any on the specimen of Helogyne at the British Museum, but the 
latter consists only of a tip of a flowering branch on which the leaves, 
3-toothed at the apex, correspond well with the uppermost leaves 10 
Berlin plant. : 
Still a fourth South American xerophytic monotype clearly bel “e 
to the same group, namely, Addisonia Rusby, Bull. Torr. Bot. Clu 
xx. 432, t. 159 (1893). Like the three preceding, it is an erect vis! 
few-flowered heads, narrow subcylindric involucre, and disk free from 
es. In common with them it has 5-angled achenes, slightly 0 
rowed toward the base, and crowned with numerous purple-tinged : 
bellate setae. What is still more significant, it shares with : 
peculiar very narrowly tubular corollas destitute of any distinct 
and provided with the same very short suberect teeth, of the same ye 
lowish white color and exhibiting the same tendency to 
