408 ^^- Fedde: Mori)hologie und Systematik der Siphonogauien 1906. [170 



Acer Davhli 1. c, lab. LXXXIII. 

 A. iwophyllum 1. c, lab. LXXXIV. 

 A. fetramenim 1. c, tab. LXXXV. 

 A. harhinerve 1. c, tab. LXXXVI. 

 A. Francheti 1. c, tab. LXXXVII. 



113'-^. Fanklhaiiser, F. Der grosse Ahorn von Harliberg. (Schweiz. 

 Zeitschr. Forstw., LVL 1905, p. 1—5, mit Abb.) 



1133. Flory, (". H. Key to the Ohio maples [AcerJ in the vvinter 

 condition. (Ohio Naturalist, V, 1905, p. 297—298.) 



Siehe „Pflanzengeographie". 



1134. Goiraii, A, Sulla presenza di Acer Opulus Mill. e di una 

 forma microphylla di Acer Psendo-jüatmms L. Neue vicinanze di Nizza 

 (Proc. verb.) (Bull. Soc. Bot. Ital., X [1905], p. 243.) 



1136. Rehder, A. Nonnullae species novae generis Jce^ix. (Wieder- 

 gabe der Diagnosen aus: Sargent, Trees and Shrubs I [1905], p. 178 ff.) 

 (Fedde, Repertorium, I [1905], p. 5—8.) N. A. 



1137. Rehder, A. Acer tetramerum Pax var. lobulatum nov. var. 

 (Fedde, Repertorium, I [1906], p. 174—175.) N. A. 



1138. Rehder, A. The Maples of Eastern Continental Asia. 

 (Sargent, Trees and Shrubs, I [1906], part. IV, p. 175—181.) N. A. 



Im Anschlüsse an die Abbildung und zum Teil Neubeschreibung einer 

 Anzahl von ^cer-Arten gibt Rehder einen Schlüssel der J.ce/'-Arten des öst- 

 lichen Asiens, der folgendermassen lautet: 



Inflorescence andro-poljgamous (monoclinous and staminate flowers in 

 the same inflorescence), Compound, terminal on leafy branchlets; flowers 

 6-merous; disk extrastaminal. 



Leaves palmately lobed or onlj occasionallj undivided. 

 Inflorescence corymbose. 



Lobes of the leaves entire or occasionally coarsely toothed, 3 — 7; 

 nutlets much flattened, smooth. I. Platandidea. 



Wings of the fruit 1 i/g to twice as long as the nutlet. 



Leaves truncate at the base, B — 7-lobed, glabrous; wings of 

 the fruit broad, only slightly longer than the nutlets. 



1. Acer truncatum. 

 Leaves subcordate or rounded at the base; wings of the fruit 

 about twice as long as the nutlets. 2. Acer pictiim. 



Wings of the fruit 2 — 4 times as long as the nutlets. 



Leaves 5 — 7-lobed or sometimes 8-lobed, glabrous or tomentose 

 beneath. 3. Acer laehim. 



Leaves partly 3-lobed and partly undivided. 



Leaves with acute or obtusish lobes, quite glabrous; inflores- 

 cence snaaU. 4. Acer tenellum. 

 Leaves with caudate lobes, pubescent beneath; inflorescence 

 large and loose. 6. Acer longipes. 

 Lobes of the leaves sharply serrate, 7 — 11; inflorescence few-flowered; 

 nutlet convex, rather smooth. IL Palmata. 

 Petioles and peduncles densely villous lobes of the leaves incisely- 

 doubly serrate. 6. Acer Sieboldianum- 

 Petioles and peduncles glabrous ornearly so; lobes of the leaves 

 sharph" serrate. 



