Neue Litteratur. 151 



of the pappus numerous , almost biseriate , nearly equal in length, 

 almost plumously ciliate. In arid calcareous tracts of country from 

 the Wimmera , Darling and Murray Rivers , extending westward as 

 far as Eucla, the northern limits of the species remaining hitherto 

 unascertained. 



When the writer of these observations discovered already in 1848 

 this remarkable plant, he placed it in the Cassinian genvis Eurybia 

 (since reduced to Olearia, and later still to Aster), on account of great 

 external resemblance to Aster pimeloides , though at the time some 

 abnormal characteristics, such as the absence of ligulate corollas, were 

 recognised and subsequently recorded. The plant is now transferred 

 to the mainly tropical genus Pluchea, of which it is the niost southern 

 species, although Pluchea eyrea was traced, in 1851, also so far south 

 as the apex of Spencer's Gulf. For including this plant in Pluchea 

 it is , however , needful to extend somewhat the limits of that genus, 

 in as much as each individual plant seems to produce within its in- 

 volucris one only of the two states of flowers, as only few flowers 

 occur in each involucre, as the flowers with imperfect anthers produce 

 also a five-lobed corolla, as the bristlets of the pappus are very copious, 

 therefore not uniseriate, and moreover, long ciliated. Some degree of 

 dioecism is, however, characteristic also of P. tetranthera and P. 

 baccharoides, while pappus-bristlets in a single or in more than one 

 row, and with various extent of denticulation or even ciliation, occur 

 together in some other genera of Compositae, for instance, in Senecio. 

 The remarkable narrowness of the stigmata in our species, as well as 

 their structure, are quite in accord with Pluchea, so also the sagittate 

 base of the anthers, although the latter is reduced to extreme minute- 

 ness. This Pluchea, however, connects the genus evidently with the 

 exclusively American Baccharis, and a section in Pluchea, as Natho 

 baccharis might be established for it; those of the staminate flowers 

 being shorter than those of the others. The involucral bracts of P. 

 conocephala arise all closely together from the exceedingly small 

 receptacle ; the corollas when dry are dull and dark-coloured towards 

 the summit, but may be purplish when fresh; the filaments are coni- 

 paratively short; the terminal plate of the anthers is almost semi- 

 lanceolar ; the stigmas of the flowers with rudimentary anthers are 

 fully exserted , those of the other kind of flower much enclosed and 

 thicker than in many other species ; the achenes are comparatively 

 long. The pappus is almost that of Ptirigeron. 

 Porta, P., Stirpium in insulis Balearium anno 1885 coUectarum enumeratio. 



(Nuovo Giornale Botanico Italiano. Vol. XIX. 1887. p. 276.) 

 Schulz, A., Die Vegetationsverhältnisse der Umgebung von Halle. 8". 98 pp. 



nud 4 Karten. Halle a. S. (Tausch & Grosse) 1888. 



Paläontologie : 



Geyler, H. Th,, Ueber fossile Pflanzen von Labuan. (Vegaexpeditionens 

 vetenskapliga Jakttagelser. Vol. IV. p. 473 — 507 o. 8 pl.) 



Kraus, G., Beiträge zur Kenntniss fossiler Hölzer. III. IV. (Sep.-Abdr.) 4'^. 

 10 pp. und 3 Tfln. Halle (Niemeyer) 1887. M. 2.— 



Teratologie und Pflanzenkrankheiten : 



Bernard, M. Gr., Champignon du figuier. (Societe mycologique de France. 

 T. III. Fase. 2. 1887. p. 117—118.) 



[Diagnose eines Pilzes , der in Algier a,n den Stämmen von Ficus 

 Carica L. im November wächst, Omphalia Fici Bernard n. sp. Verf. 

 vermuthet, dass dieser Pilz der bereits von P 1 i n i u s erwähnte Fungus 

 Fici sei.] 

 Fricke, E., Beschädigung von Garten- und Feldgewächsen durch Hütten- 

 rauch. (Landwirthschaftliche Versuchs-Stationen. XXXVI. 1887. p. 277.) 

 Pirotta, R., Sulla malattia dei grappoli, Coniothyrium diplodiella Sacc, 

 lettera al prof. D. Cavazza. 8». 6 pp. Alba 1887. 



