370 RYDBERG: SOME SENECIOID GENERA—I 
By the genus Kleinia he meant the first group of four 
species, which all had been known as Kleinia. Of the species 
of the second group only the last two, Cacalia atripicifolia and 
C. alpina, had been known as Cacalia before Linneaus’ time. 
The name Cacalia, applied to the last one, dates back to Vaillant 
and L’Obel. C. alpina L. or Adenostylis alpinus is therefore the 
historical type of Cacalia. 
It is true that Linnaeus did not always follow the general 
accepted interpretation of a name but occasionally made a 
quite different application of thesame. Let us see how he treated - 
the genus in the fifth edition of his Genera Plantarum. Here 
he credited the name to Vaillant and also cited Tournefort and 
gave as synonyms: Kleinia of former editions, Cacalianthemum 
Dill., Porophyllum Vaill., and questionably Tithymaloides Klein. 
The first four species of the Species Plantarum, which con- 
stituted Kleinia, he therefore did not regard as typical Cacalia. 
This disposes also Cacalianthemum Dill. and probably Tithy- 
maloides Klein, which belong to the same species. Porophyllum 
Vaill. became Cacalia Porophyllum L. Cacalia sonchifolia L. 
and C. hastata L. were placed in the genus for the first time in 
Species Plantarum and only Linneaus himself had used Cacalia 
for C. suaveolens in his Hortus Upsaliensis. C. atripicifolia L. 
had been known as Cacalia virginiana glabra, etc., by Morrison, 
while C. alpina had been known as Cacalia by many authors. 
Furthermore Linnaeus’ diagnosis of the genus points to this 
species especially the description of the style tips: ‘‘ Stigmata 
duo, oblonga, revoluta.”” This is characteristic of Adenostylts 
alpinus which on account of its oblong style branches has been 
placed in the tribe Euparortmag, but which Dr. B. L. Robinson 
rightly restored to the SENECIONEAE. C. atripicifolia as well 
as C. suaveolens has a true Senecioid style, with truncate style- 
branches. Cacalia alpina L. must therefore be regarded as the 
type of Cacalia, and Adenostylis becomes a synonym. Cacalia 
is to be excluded from the North American flora. 
PsacaLiuM Cass. Dict. Sci. Nat. 43: 461. 1826. 
Cassini was one of our best students of the Composites, and 
it would have-been well if Lessing, Bentham & Hooker, Gray, 
Klatt, and Hoffman had paid more attention to his genera, most 
