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SHIRASAWANUM
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Copyright 2005-2006. Laurence C. Hatch. All Rights Reserved.
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'Autumn Moon' - click image
JC Raulston Arboretum. April 2006. I would not have thought of planting a large, bright blue Iris near a small developing
maple but this was either a stroke of genius or just a really wonderful accident.

Acer shirasawanum 'Autumn Moon'
lc: orange with yellow and yellowish-green tones suffused together, tips often oranger or redder, best color with some sun. Based
lc: on the JCRA plant above I would describe it as having a bright chartreuse base color, tinged reddish-orange toward the margins
lc: at 25-50% of the blade, some portions very boldly and crudely mottled reddish-orange, but most portions with a very subtle
lc: and transitioned fade from red to fluorescent light lime. This one of the more appealing and happy blends of a red and gold leaf
lc: to be seen in this genus. In this genus that is intended to be a strong compliment. 
ls, lm: similar to 'Aureum' for lobing and incision depth
afc: orange to red shades, often showy if given enough sun
or: Vertrees, Maplewood Nursery from superior colorful seedling of 'Aureum' in 1978

Acer shirasawanum 'Diana'
ht: 5-6m
ha: small multi-trunked tree to shrub
lc: bright green, sometimes mottled and suffused white on green, chimera as small as 5-10% surface. MAPLES FOR GARDENS
lc: does not mention the white markings at all - so does it revert?
ls, lm: 9-13 lobed,
ll, lw: 10-15cm wide and long
afc: yellow
or: von Gimborn Arb.
in: Esveld 1995

Acer shirasawanum 'Ezo-no-o-momiji'
ht: 6-8m
ha: small tree to large shrub, multi-trunked, described by Vertrees as with thicker and stubbier branchlets, tiered to scaffolding form with age
ls, lm: 9-11 lobed, cut about 25% deep
lc: light green becoming dark green, especially on internal, shaded foliage, more textured than 'Aureum'
afc: gold to red shades, mostly yellow tones
prop: difficult to graft, hence a rarish entity
ll, lw: very variable dimensions, often 6-10cm wide, largest on old mature trees

Acer shirasawanum 'Gloria'
ht: 6-8m
ha: upright tree
lc: bright red becoming bronze-green to brownish-red, somewhat glossty
afc: bright red, showy
ll, lw: 8-12cm wide and long
lm, ls: (7) 9-11 lobed, very high cut at 70-80% or more, margins coarsely dentate (a distinct feature in clones to date)
frc: purple tinged
or: Esveld 1995 as chance seedling. It may be a cross of 'Palmatifolium' with a nearby A. palmatum 'Bloodgood' (!!!). MAPLES FOR
or: GARDENS notes that the flowers and fruit much favor assignment to just this species.

Acer shirasawanum 'Helena'
id, lw, ll: smaller-leaved clone very much as 'Microphyllum'. Any distinctions are not yet reported.

Acer shirasawanum 'Junihitoe'
ht, ha: 3m (30 years) per Vertrees, semi-dwarf overall, usually dense in whole or part
ls, lm: orbicular outline, cut 25-30% deep, 11 lobes, margins notably serrate
ll, lw: 4-7cm wide and long, much smaller than species
frc: samara orangish, showy
in: Henry Hohman, MD USA to US trade
id: petioles stiff and horizontal - more thin and variably-angled in 'Microphyllum' per Vertrees. The two plants are VERY close overall.
id: MAPLE FOR GARDENS says this name is used by different authors for different plants, some of them clearly the
id: true 'Microphyllum'. As the two are confused and mixed, they say "its current expression seems to us to be identical
id: with 'Microphyllum'." That said, contamination of a valid name with imposters does not remove the validity of either name. The
id: correct step is to trial and select a good clone or two, document them with DNA, and run with the new, pure names
id: unless the original clones can be reintroduced with a distinct DNA profile from all the imposters.

Acer shirasawanum 'Kakuregasa'
lc: very similar to 'Aureum' but the van Geldens say it "might be somewhat lighter yellow"

Acer shirasawanum 'Microphyllum' (f. microphyllum)
ha: 4-6m - shorter by some reports. MAPLE FOR GARDENS says 8-10m which is very large.
ha: smaller, slower tree than typical
ls, lm: orbicular outline, 9-11 lobes, margins serrate
lc: dark green
id: see under 'Junihitoe'
ll, lw: 6-8cm wide and long, much smaller blades, some leaves as large as 10cm
pet: red
afc: red to yellow shades, typically more yellow
or: Siesmayer, Germany 1888

Acer shirasawanum 'Minori-no-tsuki' ('Munn 001'?)(10/5)
lc: new growth bright red, becoming yellow, and finally more green, new growth and old contrasting very sharply, scorch
lc: resistant in originator's nursery.
or: Carl Munn, Munn's Nursery, Brooks, OR USA before 2004 as seedling of 'Aureum'
pat: if this is 'Munn 001' (as it appears to be) a US Patent was applied for on 1/19/2006.
in: not yet introduced as of Tebbitt (2005).
ns: name means "harvest moon", continuing the moon theme from 'Aureum' (Fullmoon Maple)
li: Maple Soc. Newsletter 13(3): 2
li: Tebbitt, M.A. 2005. Int. reg. of cultivar names for unassigned gen. HortScience 40(6): 1596

Acer shirasawanum 'Ogurayama' = A. sieboldianum 'O.'

'Palmatifolium' - click image
JC Raulston Arboretum. A nice young example, showing the deep incisions and larger, many-lobed blades.

Acer shirasawanum 'Palmatifolium'
ha: 8m
ha: upright to subglobose
st, bk: sometimes white marked, dusty white, or striated white, later not marked
ls, lm: 11 lobes, marginal serrates very large and visible, very well cut to 50-70% deep - more so than most other clones
ll, lw: 8-10cm, sometimes larger, a very wide, huge blade in mature trees
lc: bright green, slightly translucent, later medium green, always a rich shade
afc: yellow to red and orange, often with yellow veibs and various shades from light orange to dark red
afc: suffosed over the blade. It is perhaps the best clone for large leaves and fall color.

Acer shirasawanum 'Sayo shigure'
ha: shrub to small tree
ls, lm: 9 lobed, cut about 50% deep, finely serrate margins
lc: dusky green
ll, lw: 5-7cm long and wide
afc: yellow with orange tints

Acer shirasawanum 'Susanne'
ht: 5-6m
ha: shrub, usually dense, smaller
lc: light yellow at first, later more green, often have paler tips and darker green veins
ns, or: Arboretum Thiensen and H.J. Drath of Germany 1992, named by Esveld for the daughter
ns, or: of the Arboretum's director.
eval: somewhat intermediate between 'Microphyllum' and 'Aureum' for colors and leaf traits.

Acer shirasawanum var. tenuifolium
ht: 10m in wild, smaller in gardens
ll, lw: 5-8cm long and wide
ls, lm: 7-9 lobes (fewer), incised nearly to the base or 80-90% - typical variety is 25-35% cut
lc: light green
afc: yellow to orange shades
geo: soutnern Hokkaido, Honshu, Shikoku Islands
ns: named by Koidzumi 1911
id: often "wrongly labeled" per MAPLES FOR GARDENS. Their own photo shows leaves cut just 35% so perhaps
id: that is one such imposter(?!?). While 'Palmatifolium' is also deeply cut as the true variety, it has more (11) lobes
id: and blades much larger (commonly 10cm or more).

Acer shirasawanum 'Yasemin'
ht: 10m x 3-4m
lc: lossy brownish-red, less shiny than 'Gloria' but overall similar
ls, lm: 9-11 lobed, finely serrate, blade slightly convex
frc: red, often showy
in, or: Esveld, intro. 1995, named Mirte Yasemin van Gelderen, daughter and granddaughter of the famous Acer experts. It may have
in, or: same interspecific origin as 'Gloria' but this is not yet proved. It is from 'Palmatifolium' seed.