220 Pteridophyten. — Floristik etc, 



Asiatic species of the Pleopeltis section of the genus Polypodium. In 

 Christensen's „Index Filicum" there are about 70 species of 

 Pleopeltis allotted to temperate and subtropical Asia. Many of these 

 the present author has investigated; and he finds that considerable 

 reform in nomenclature and also in our conception of certain spe- 

 cies is necessary. Many a species has been named over and over 

 again by different, or by the same, botanists. Consequently, about 

 one third of the species have to be reduced; yet a few species, 

 long regarded as Synonyms, have to be resuscitated. After critici- 

 sing the various methods of Classification of leading authors, and 

 calling for something more natural, the author expresses a faith in 

 such characters as: ramenta on rhizoma, position of sori, direction 

 of pinnae (especially the lowest pair), margin of frond, and texture. 

 He gives a list of 39 species, with varieties, Synonyms, etc., and 

 either supplies a diagnosis, or emphasises the salient characters of 

 each species, variety, form. Polypodium lineare Thunb. is a Poly- 

 morphie species of wide distribution, which in the past has been 

 treated either as one broad species or as a number of distinet 

 species. The author, after studying most of the types, prefers to 

 amplify the species; and he S} 7 stematises the varieties and forms as 

 follows: Polypodium lineare Thunb. amplif.; «) Thunbergianum 

 (Kaulf.), f. caudatoattenuatum Takeda, and f. contortum (Christ); 

 ß) subspathulatum (Hook.); y) ussuriense (Rgl. et Maack); 6) loriforme 

 (Wall.), f- stenisie (Clarke); e) elongatum (Schrad.). To each of these 

 combinations he adds a definition, synonymy, distribution, and cri- 

 tical notes. Other names to be noted are: P. subimmersum Baker 

 f. angustifrons Takeda n. f., and f. mengtseanum (Bak.) Takeda n. 

 comb.; P. sublineare Baker in sched. n. sp.; P. excavatum Bo^ a 

 concolor Takeda n. var.. and ß bicolor Takeda n. var., and Monstr. 

 polymorphum (Clarke) Takeda n. comb.; P. hymenodes Kunze a. 

 sparsisorum Takeda n. comb., and Monstr. anornalum (Christ) Takeda 

 n. comb., and ß marginale Takeda n. var.; P. Buergerianum Miquel 

 « stipitatum Takeda, and ß ningpoense (Bak.) Takeda; P. subhasta- 

 tum Baker « hederaceum Takeda, and ß longifrons Takeda n. var.; 

 P. Veitchii Baker 8 nigrovenium (Christ) Takeda n. comb. P. nudum 

 has been much confused by authors with P. lineare and P. excava- 

 tum; this confusion the author clears away by emphasising the 

 distinetive characters of the three species, and by grouping under 

 each species the perplexing synonyms. 



In an Appendix to the paper he gives an alphabetical list oi 

 the Chinese and Japanese species of Pleopeltis which are preserved 

 in the Herbarium of the Royal Botanic Garden, Edinburgh. 



A. Gepp. 



Kolkwitz, R.. Ueber die Standorte der Salzpflanzen. 

 (Ber. D. Bot. Ges. XXXV, p. 518—525. 1917.) 



Verf. stellt auf Grund eigener Beobachtungen in der Umgebung 

 des Kyffhäaser Gebirges, sowie Angaben früherer Autoren die 

 verschiedensten Abstufungen unter den Bewohnern ständig oder 

 periodisch salzhaltiger Standorte fest. Er underscheidet 1. Pflanzen, 

 welche auf schwach salzige Boden übergehen ohne spezifisch phy- 

 siologische oder morphologische Anpassung, 2. Pflanzen, welche 

 durch schwache Salzgaben in ihrem Stoffwechsel wenigstens zeit- 

 weise angeregt werden, ohne sonst merklich salzliebend zu sein, 

 3. nicht obligat salzliebende Pflanzen, welche auf schwach salzigem 



