212 C. SKOTTSBERG 



Die Bliitenkopfe sind bei Robinsonia erheblich zahlreicher und kleiner, kiirz und hreit 

 glockenformig, bei unserer Pflanze aber schmalglockig. 



VVurden diese Sippen demselben pflanzengeographischen Gebiete angehoren, so 

 wiirde man sie sicher nicht generisch trennen konnen. Was hier aber wesentlich dazu 

 zwingt, ist, dass die Zweihiiusigkeit, die ja hier die wesentliche Ubereinstimmung be- 

 dingt, bei den Kompositen zu den verschiedensten Malen in den verschiedensten und 

 auch in denselben Gruppen entwickelt wurde und daher keineswegs als Kriterium 

 fiir eine generische Verwandtschaft angesehen werden kann. 



To this I shall remark that nobody would think of uniting Rohijisonia and 

 Rhetinodendron, because they differ in essential floral characters. Brachionostylum 

 is, to judge from the description and plate XC: B (only ? known), closely related 

 to Robinsonia but not to Rhetinodcndroii. The mode of growth is not quite the 

 same, for in Robinsonia (as well as in Rlietijiodendron) 2 or 3 innovations are 

 developed, and none of them continues the mother axis. Besides, Brachionostylnm 

 has petiolate, penninerved leaves of a type current in dicotyledons and widely 

 different from the sessile, linear-lanceolate, broadly clasping and parallel-veined 

 leaves of Robinsonia. 



gayana Dene and thtirifera Dene are a pair of related species. 



evenia Phil, and Masafuerae Skottsb. form another pair. 



gracilis Dene stands more isolated. 

 Symphyochaeta (DC.) Skottsb. See 2^g. 785. 



macrocephala (Dene) Skottsb. 

 Rhetinodendroti Meisn. Berterii (Dene) Hemsl. See above. 



Centaurodendron dracaenoides Johow. Not, as has been supposed, just an ar- 

 boreous Coitanrea, but differing materially in flower structure [24.J). 

 Yunqiiea Tenzii Skottsb. See 277. 163. 



Dendroseris C. Don. An isolated genus, perhaps distantly related to TJiamno- 

 seris Phil, from Desventuradas Is., but probably not to Fitchia Hook. fil. Ben- 

 TliAM stated (20.480) that the achenes of Dendroseris differ from those of the 

 Cichorioideae in general, and that also the involucre and the habit are different. 

 With regard to the achenes this is certainly true of Dendroseris s. str., and also 

 of Phoenicoseris, whereas they are of a rather normal type in Rea and Hespe- 

 roseris. All are devoid of paleae, which are present in T/ianinoseris and Fitchia, 

 a distinctive feature pointed out by Bentham, but the awned achenes of Fitchia 

 differ from those of all the other genera mentioned. In spite of the profound 

 discrepances in such important characteristics as inflorescence, involucre, recep- 

 tacle and stigma Thaninoseris has more in common with the Douiroseris as- 

 semblage than with other genera. 



macrophylla D. Don, macrantha (Bert, ex Dene) Skottsb., marginata (Bert. 

 ex Dene) Hook, et Arn. and litoralis Skottsb., all lumped together by Joiiow, are 

 well-marked species; comp. 22^.201-204. 



Phoenicoseris Skottsb., 2^p. 787. 



pinnata (Bert, ex Dene) Skottsb. and berteriana (Dene) Skottsb. (Masatierra) 

 are closely related but quite distinct; regia Skottsb. (Masafuera) differs from both 

 in leaf shape, but fertile specimens have not been found. 



