Picea likiangensis (Franch.) Pritz.

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Credits

Article from Bean's Trees and Shrubs Hardy in the British Isles

Article from New Trees, Ross Bayton & John Grimshaw

Recommended citation
'Picea likiangensis' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/picea/picea-likiangensis/). Accessed 2019-12-08.

Genus

Synonyms

  • Abies likiangensis Franch.
  • P. yunnanensis Hort.

Glossary

Tibet
Traditional English name for the formerly independent state known to its people as Bod now the Tibet (Xizang) Autonomous Region of the People’s Republic of China. The name Xizang is used in lists of Chinese provinces.
Xizang
See Tibet.
abaxial
(especially of surface of a leaf) Lower; facing away from the axis. (Cf. adaxial.)
acute
Sharply pointed.
adaxial
(especially of surface of a leaf) Upper; facing towards the axis. (Cf. abaxial.)
amphistomatic
With stomata on both sides of the leaf.
apex
(pl. apices) Tip. apical At the apex.
cone
Term used here primarily to indicate the seed-bearing (female) structure of a conifer (‘conifer’ = ‘cone-producer’); otherwise known as a strobilus. A number of flowering plants produce cone-like seed-bearing structures including Betulaceae and Casuarinaceae.
epistomatic
Possessing stomata only on upper side of leaf.
glandular
Bearing glands.
glaucous
Grey-blue often from superficial layer of wax (bloom).
herbarium
A collection of preserved plant specimens; also the building in which such specimens are housed.
key
(of fruit) Vernacular English term for winged samaras (as in e.g. Acer Fraxinus Ulmus)
ovate
Egg-shaped; broadest towards the stem.
ovoid
Egg-shaped solid.
pubescent
Covered in hairs.
section
(sect.) Subdivision of a genus.
taxonomy
Classification usually in a biological sense.

References

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Credits

Article from Bean's Trees and Shrubs Hardy in the British Isles

Article from New Trees, Ross Bayton & John Grimshaw

Recommended citation
'Picea likiangensis' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/picea/picea-likiangensis/). Accessed 2019-12-08.

A tree up to 150 ft high in the wild; bark grey or purplish grey, fissured; buds ovoid, resinous; young shoots usually pale brown or yellowish grey, more or less hairy; leaf-pegs unusually long. Leaves four-angled, slightly broader than high in cross-section, 38 to 58 in. long, acute and bevelled at the apex, those on the upper side of the shoot pointed forward, the lower leaves more or less pectinately arranged, grey-green or dark green on the exposed side, glaucous or silvery on the ventral side. Cones ovoid, 2 to 212 in. long, 112 to 134 in. wide; cone-scales flexible, the upper part ovate, rounded, wavy, spreading outward after ripening.

P. likiangensis is of wide range in Western China and extends into Tibet; discovered by the French missionary Delavay in the Lichiang range of Yunnan in 1884. Forrest sent seeds from this area in 1910 (F.6746), but the first introduction was by Wilson six years earlier, from W. Szechwan (W.1834), when collecting for Messrs Veitch. Even from a single seed collection P. likiangensis varies considerably in the colour and degree of hairiness of the shoots, colour of the leaves, etc.

Although subject to damage by late frosts when young, this spruce grows well in the British Isles and deserves to be more commonly planted; at present it is rarely seen outside collections. The young cones and male flower-clusters are brilliant red. Some examples are: Wakehurst Place, Sussex, 56 × 514 ft (1969) and 59 × 5 ft (1968); Warnham Court, Sussex, from W.1834, 69 × 512 ft (1971); Borde Hill, Sussex, from F.6746, 56 × 514 ft (1968); National Pinetum, Bedgebury, Kent, pl. 1926, 48 × 614 ft (1968); Stanage Park, Radnor, pl. 191o, 71 × 6 ft (1970); Edinburgh Botanic Garden, from F.6746, 46 × 434 ft (1970); Powerscourt, Co. Wicklow, Eire, 68 × 614 ft (1966).

From the Supplement (Vol. V)

This is portrayed in Bot. Mag., n.s., t.873.

specimens: Wakehurst Place, Sussex, 62 × 514 ft and 56 × 6 ft (1980); Borde Hill, Sussex, The Tolls, from Forrest 6746, 59 × 434 ft (1978); National Pinetum, Bedgebury, Kent, pl. 1926, 62 × 7 ft (1981); Hergest Croft, Heref., pl. 1928, 82 × 6 ft (1985); Stanage Park, Powys, pl. 1910, 77 × 614 ft (1978); Beaufront Castle, Northumb., 69 × 7 ft (1982); Edinburgh Botanic Garden, from Forrest 6746, 62 × 534 ft and 46 × 5 ft (1985); Powerscourt, Co. Wicklow, Eire, 77 × 534 ft (1980); Birr Castle, Co. Offaly, Eire, 77 × 534 ft (1980); Abbeyleix, Co. Laois, Eire, 56 × 512 ft (1985).

var. balfouriana – The only examples recorded are two at Dawyck, Peebl., both measuring 66 × 4 ft (1982), and one in the Edinburgh Botanic Garden, from W.4080, 56 × 334 ft (1985).

var. purpurea - specimens: Wakehurst Place, Sussex, 57 × 414 ft (1980) and 56 × 412 ft (1974); Borde Hill, Sussex, 60 × 314 ft (1974); Petworth House, Sussex, 77 × 412 ft (1983); Vernon Holme, Kent, 60 × 414 ft (1973); Westonbirt, Glos., pl. 1931, 77 × 414 ft (1980); Eastnor Castle, Heref., 58 × 434 ft and 70 × 512 ft (1984); Headfort, Co. Meath, Eire, 60 × 514 ft (1980).

From New Trees

Picea likiangensis (Franch.) E. Pritz.

Likiang Spruce

This comparatively familiar species with beautiful young cones was described by Bean (B188, S365) and Krüssmann (K194) and reviewed by Hunt (Hunt 1983), but the taxonomy has since been revised and a number of new names and concepts are in circulation. The status quo is the position of the Flora of China account (Fu et al. 1999c) and Farjon’s World Checklist (2001), both of which accept five varieties within the species (vars. likiangensis, hirtella, linzhiensis, montigena, rubescens), plus the related Picea purpurea Mast. (see Bean and Krüssmann: B118, K195, in both cases as P. likiangensis var. purpurea (Mast.) Dallim. & A.B. Jacks.). In a recent paper, however, Rushforth (2008) has reviewed the P. likiangensis complex and makes some very convincing proposals for rationalising the names and concepts within it, based not only on morphological characters but on his own extensive knowledge of the distribution of the taxa in the Sino-Himalaya. In addition to P. likiangensis subsp. likiangensis and P. purpurea, Rushforth (2008) recognises P. linzhiensis as a full species, while the three other varieties are treated together as subsp. balfouriana. The two classifications differ principally in the interpretation of the status of the taxa involved; we follow Rushforth’s view here as it has advantages to the horticultural community in simplifying the nomenclature of this difficult group, but also clearly represents the desirable biological species concept so often overlooked in herbarium-based studies. A key to the taxa is presented below.

1a.

Branchlets with glandular hairs; leaves epistomatic or rarely with one to two incomplete lines of stomata along each abaxial surface; cones (5–)6–9(–12) cm long; Xizang

P. linzhiensis

1b.

Branchlets pubescent; leaves amphistomatic or rarely with stomatal lines absent from abaxial surfaces

2

2a.

Branchlets slender, sparsely pubescent; leaves bluish, with four lines of stomata; cones (7–)10–12(–15) cm long; southwest Sichuan, Yunnan (Lijiang range, and adjacent areas)

P. likiangensis subsp. likiangensis

2b.

Branchlets slender or stout, densely pubescent; cones 2.5–9(–10) cm long

3

3a.

Branchlets stout; leaves bluish green, with two broad bands of stomata on adaxial side and two narrower bands on abaxial side; cones 4.5–9(–10) cm long; west Sichuan, etc.

P. likiangensis subsp. balfouriana

3b.

Branchlets slender; leaves with dark green shiny abaxial surface lacking or with one to two incomplete stomatal lines; cones 2.5–5.5 cm long; northern Sichuan to southern Gansu

P. purpurea


P montigena Mast

A little-known species, possibly a hybrid between P. likiangensis and P. asperata; discovered by Wilson in 1903 in W. Szechwan. He may have sent seeds in the same year, and anyway did so in 1910-11, during his second expedition for the Arnold Arboretum (W.4084; this number is wrongly dated 1908 in Pl. Wils.). Some plants distributed under the name P. montigena proved to be a stunted form of P. asperata.

subsp. balfouriana (Rehder & E.H. Wilson) Rushforth

Synonyms
P. montigena Mast. (?)
P. balfouriana Rehder & E.H. Wilson
P. likiangensis var. rubescens Rehder & E.H. Wilson
P. likiangensis var. balfouriana (Rehder & E.H. Wilson) Hillier ex Slavin
P. likiangensis var. hirtella (Rehder & E.H. Wilson) W.C. Cheng
P. likiangensis var. montigena (Mast.) W.C. Cheng

In its traditional horticultural sense subsp. balfouriana is one of the better-known and more widely grown forms of Picea likiangensis, differing from subsp. likiangensis in several morphological features, including the more hairy shoots and smaller cones, but also the imbricate leaves that droop from the sides of the shoot (rather than pointing upwards and outwards as in subsp. likiangensis). It is also geographically and ecologically distinct (Rushforth 1999). It has persisted in cultivation since its introduction by Ernest Wilson, and it is possible that most trees in arboreta are derived from Wilson’s collections, although in Scandinavian arboreta there are several from Harry Smith introductions, and the two trees at the Hillier Gardens may derive from one of these (K. Rushforth, pers. comm. 2007). There are good trees at Dawyck, 18 and 21 m tall in 1997 (Johnson 2003), grown from Wilson 4080, and this collection number is also represented by a grafted tree of 6 m (since 1980) at Kew. The taxon has been reintroduced from more recent expeditions, including Roy Lancaster’s gathering from the Pa La River valley in western Sichuan in 1987 (Lancaster 908), and the Sichuan Expedition’s SICH 704 from 1991 (a tidy 4 m at Dawyck in 2006). Its horticultural value lies in the pleasing combination of glaucous foliage and red female cones in spring.

Trees have been in cultivation under the name var. hirtella since its discovery by Ernest Wilson in 1908 in western Sichuan (Wilson 2082, 2084). A resultant tree grew at Glasnevin, and a grafted specimen presumed to be from this is at the Hillier Gardens (K. Rushforth, pers. comm. 2007). Specimens grown at Kew from SICH 1126, collected by the Fliegner, Howick, McNamara and Staniforth team at c.2950 m above Muli, Sichuan in 1992, are attributed to this taxon and seem to fit here, with their (variably) pubescent shoots and rather glaucous leaves. They have made rather sparse-looking trees with a distinctly bluish appearance. SICH 645 from 1991 is also attributed to var. hirtella, which is supposed to differ in its yellow-brown cones with denticulate seed scales. The existence of ‘true’ var. montigena in cultivation has long been discussed, and most if not all specimens so-named represent P. asperata (Mitchell 1972, Bean 1976b, Rushforth 2008).

subsp. likiangensis

Picea likiangensis subsp. likiangensis is well established in cultivation, principally from early-twentieth century introductions, although more recent gatherings have been made. Literature references to unspecified ‘P. likiangensis’, and trees so labelled, are usually referable here. It is less hardy than subsp. balfouriana, however, and is unlikely to be found in areas with hard winters.

var. balfouriana (Rehd. & Wils.) E. H. Hillier

Synonyms
P. balfouriana Rehd. & Wils

This variety was described, as a species, from specimens collected by Wilson west of Tatsien-lu (Kangting) in 1910, during his second expedition for the Arnold Arboretum, but was not recognised as even varietally distinct from the type by A. B. Jackson. A. F. Mitchell has noted that the cultivated trees are really nearer to var. purpurea than to the type. These may be from W.4065, collected in the Pan-lan-shan, of which Rehder and Wilson remarked: ‘In general appearance this number suggests P. purpurea.’ There are trees in a few collections.

var. purpurea (Mast.) Dall. & Jacks.

Synonyms
P. purpurea Mast

Bark divided into rather thin, scaly plates; shoots very densely clad with long hairs. Leaves shorter than in the type, about {1/2} in. long, dark green on the exposed side, more closely appressed to the shoot. Cones mostly smaller, about 2 in. long (but occasionally up to 3 in.), violet-purple when young. Native of Kansu and N.W. Szechwan; discovered by Wilson in 1903 and introduced by him in 1910-11 from near Sungpan; it was reintroduced by Joseph Rock from Kansu. Some examples are: Wakehurst Place, Sussex, 70 × 3{1/4} and 56 × 4{1/2} ft (1974); Borde Hill, Sussex, Pinetum, 60 × 3{1/4} ft (1974); Vernon Holme, Kent, 60 × 4{1/4} ft (1973); Westonbirt, Glos., pl. 1931, 62 × 3{1/2} ft (1969).

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