78 Floristik, Geographie, Systematik etc. 



Hieracien aus der Umgebung von Mähr. Weiss kirchen und 

 österr. Schlesien. Neu sind Hieracium hyperdoxoides H. Zahn 

 et Petrak = H. Bauhini X canum nov. sp. hybr. und H. floribun- 

 dwn W. et Gr. ssp. hylaeophilum H. Zahn et Petrak nov. subspec. 



Leeke (Neubabelsberg). 



Petrak, F., Ueber einige Rosen aus Böhmen und Mähren. 

 (Allg. bot. Zschr. XVI. 5. p. 71—72. 1910.) 



Verf. bringt unter Angabe der Standorte eine Aufzählung der 

 von ihm bisher in der Umgebung von Mährisch- Weisskirchen 

 beobachteten, sowie einer Anzahl anderer in Konradsgrün und 

 in Töltsch bei Eger in Böhmen gesammelter Rosenformen. Neu 

 sind die erstmalig beschriebenen Varietäten Rosa glauca Vill var. 

 pilinäeva H. Braun, nov. var. (Mähren), R. coriifolia var. Jahniana 

 H. Braun, nov. var. (Böhmen) und R. coriifolia var. Egerensis H. 

 Braun, nov. var. (Böhmen). Leeke (Neubabelsberg). 



Quehl, L., Zur Richtigstellung. (Mschr. Kakteenk. XXI. 12. 

 p. 183. 1911.) 



Richtigstellung der in der „Garten weit" XV. p. 537 sich finden- 

 den Angaben über die Gründe, welche K. Schumann in seiner 

 „Gesamtbeschreibung der Kakteen" veranlasst haben, Anhalonium 

 Williamsii Engelm. aus dieser Gattung herauszunehmen und in die 

 Gattung Echiuocactus einzureihen, zugleich Richtigstellung weiterer 

 a. a. O. sich findender Mitteilungen über das Verhalten des Frucht- 

 knotens der Mamillarien nach der Blüte. Leeke (Neubabelsberg). 



Trelease, W., The Agaves ofLower California. (Ann. Rep. 

 Mo. Bot. Gard. XXII. p. 37—65. pl. XVIII— LXXII. Feb. 14, 1912.) 

 Heretofore only 8 species of Agave have been known from Lower 

 California, and these represented by only a few specimens. Doctor 

 Trelease now assigns 25 species to that region, and from what the 

 reviewer knows of it the number is none too large. The report is 

 based largely upon the excellent series collected by E. W. Nelson 

 and E. A. Goldman, who made a trip through the entire length of 

 the Peninsula in 1905, and upon the various collections of Mr. T. S. 

 Brandegee, who visited California on several occasions, and also 

 upon the collections made by the U. S. steamer Albatros in its 

 cruise about the Peninsula in the spring of 1911. Doctor Trelease's 

 treatment of this group is monographic, and although it is not the 

 last word to be said upon it for Lower California, it must form 

 the basis of all future work. His paper opens with an entertaining 

 introduction, followed by a synoptical key to the 25 species, and 

 this by a füll bibliography of each species with comprehensive and 

 clear descriptions. Most of the species are illustrated either by full- 

 page habit sketches or by photographs of the flowers, fruit and 

 leaves, and sometimes all combined. A rather unusual feature in 

 American systematic works is the explanation of all the specific 

 names and in the case of personal names a line or two of appreci- 

 ation. The distribution of the species is very accurate, and all spe- 

 cimens examined are recorded. The localities for each species are 

 carefully designated on a good full-page outline map. 



The following new species are described : Agave affinis, avella- 

 iiideus, bvandegeei, carminis, cerulata, cormochaetodon , consociata , 



