318 Floristik u. Systematik der Phanerogamen. — Palaeontologie. 



ScHUETTE, J. H., The Hawthorns ofNortheastern Wis- 

 consin. (Proceedings oi the Biological Society oi Washing- 

 ton. XVI. p. 91—97. June 25. 1903.) 



An artificial key with descriptions ref erring to 8 forms of Crataegus 

 -ecognized in the region. The foHovving new names are published: C. 

 pyi'ifolia sylvestris and C. caliciglabra. Trelease. 



WiESBAUR, J. B., Der Schulgarten. Systematische Auf- 

 zählung der im Schulgarten des Duppauer Gym- 

 nasiums cultivierten Pflanzen. Fortsetzung. (Jahres- 

 bericht des Privatgymnasiums zu Duppau in Böhmen für das 

 Schuljahr 1902—1903. 1903. 8«. p. 17—32.) 



Der Beginn der Arbeit wurde im Jahresberichte für das Schuljahr 

 1901/02, p. 17 — 22, veröffentlicht. Bei den genannten Species wird stets 

 die Provenienz der Art angegeben. Im Anhange 1 werden die für die 

 Schule wichtigen Holzarten, welche in der Nähe des obigen Gymnasiums 

 vorkommen, aufgezählt. Der Schluss der Arbeit folgt im nächsten 

 Jahresberichte. Matonschek (Reichenberg). 



Wright, C. H., New or Notewort hy Plauts. Eucomis 

 jacqiiinil C. H. Wright. (The Gardeners' Chronicle. Vol. 

 XXXI V. 3rd ser. No. 802. 1903. p. 1—2.) 



Two plants have been confused under Eucomis nana, which has long 

 obovate leaves, tapering to the base, a purple-spotted peduncle and 

 comal bracts with a purple border. J a c q u i n figures another plant under 

 this name with leaves, which taper less, and with no purple in the in- 

 florescence and for such specimens the name E. Jacquinii is proposed. 



F. E. Fritsch. 



Stopes, M. C, On the leaf structure of Corclaites. (The 

 New Phytologist. Vol. II. 1903. Nos. 4 and 5. p. 91-98 

 and Plate IX.) 



The specimens examined were derived from Grand' Croix 

 (Stephanian), France, and are probably identica! with Cor- 

 deutes prlncipalls Ren. The leaves are dorsiventral in struc- 

 ture. The bundles form a single row, and the majority of them 

 are parallel and equidistant, and brauch but rarely. Fach bündle 

 is inclosed in a double sheath, and accompanied by Strands of 

 sclerenchyma above and below, and large Strands of the same 

 tissue alternate with the bundles on the lower face. The 

 parenchyma of the leaf is differentiated into palisade above, 

 and spongy parenchyma below. 



The bundles are of the type usual in Cordaltes with well 

 marked protoxylems and a wedge of centripetal xylem above. 

 The bündle sheath is double. Its nature and origin is fully 

 discussed. It is concluded that the majority of known Cor- 

 daitean leaves appear to be without centrifugal Xylem as in 

 this case, and that there seems to be some resemblance bet- 

 ween the leaf bundles of most species of Cordaltes, and the 

 petiolar bundles of Mediillosa. A simiiar type of bündle is also 

 found at the edges of the leaves of Poroxylon. 



Arber (Cambridge). 



