Acer acuminatum

Acer acuminatum Wall. ex D.Don, Prodr. Fl. Nepal. 249 1825. (Syn: Acer sterculiaceum K. Koch); 

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May be Acer caudatum

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Leaves 3-5 lobed, flower stalks longer than 5 mm, I would go with A. acuminatum. 5-7 lobed leaves and pedicels shorter than 5 mm in A. caudatum. Pl. see my comments in another thread.

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VOF Week: Acer sp.1 from the Trek:  Three distinct species of species we could find along the trek (may be few more are there)…here is the first one for id….

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I hope Acer caesium

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this may be Acer caudatum, because of tip of leaf lobes are long tail like.

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Thanks … Surely it is not A. caesium as the leaf magins are much more strongly serrate with deeper cuts. It prompted me to some more investigation. There is generally an impression that A. acuminatum is the new name for Acer caudatum, as appears from Flora of Pakistan and Flowers of India. It, however, appears , looking at Flora of China (sorry I don’t have much literature here in California at present) that two are distinct, and both grow in Western Himalayas from Kashmir to Nepal. The two seem to be very distinct being placed in separate sections Spicatae (flowers in spicate-paniculate infl. A. caudatum-pedicel barely 5 mm long, leaves 5-7 lobed, base cordate, margin serrate) and section Arguta (flowers in racemose inflorescence, 4-merous. A. acuminatum, leaves 3-5 lobed, margin usually double-serrate).