Guioa koelreuteria

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Guioa koelreuteria


Shrub to tree, 2-16 m high, dbh 2-50 cm; Branchlets especially sericeous (to hirsute) when young; Leaves 1-6-jugate; Inflorescences axillary (to pseudoterminal), unbranched to branching basally and along the slightly flattened, brown (sub)sericeous (to hirsute), 0.8-20.5 cm long axis; Flowers Z2-A mm in diam. Sepals 5, ovate, margin pilose, with glands, outside and inside (sub)glabrous, pink; Petals 5, (elliptic to) obovate, 1.8-3.8 by 1-2.5 mm (see note 4), creamy white (to reddish); Stamens 8 (or 9); Fruits with 1-3 well developed lobes, 1-2.2 by 1-2.3 cm, completely dehiscent, smooth, glabrous, red when fresh, blackish when dry; Seeds (globose to) obovoid, 5 3-8.5 by 5-7.5 mm;


Asia-Tropical: Borneo present; Philippines (Philippines present), islands NE of Sabah present
Malesia: Borneo (islands NE of Sabah), Philippines.


The wood is used for agricultural implements and tool handles (Reyes in Desch, 1954). OH extracted from the seeds can be used to cure certain skin diseases ().


1. Guioa koelreuteria is rather variable as can be expected of a species whose range extends over several islands. The leaflets differ much in size, most are small, but some can become rather large. The leaflets are usually rather thin, but some have thick coriaceous leaflets. A rather distinct form, found on Mindanao, Davao Prov., and occasionally on Guimaras Island, has leaflets which always possess many domatia and short (combined with a few long) hairs sparsely all over the lower surface, while the inflorescences are patently pilose instead of (sub)sericeous.
The specimens which were described as G. salicifolia differ only slightly from 'normal' G. koelreuteria, the leaflets are more coriaceous and relatively narrower.
'Guioa mindorensis' is also distinguishable. The characters mentioned by Merrill (small leaflets, winged rachis) can also be found among more typical specimens of G. koelreuteria. On Mindoro two forms can be found, typical G. koelreuteria with leaflets without papillae and usually with a long cuspidate apex and 'G. mindorensis' with papillae and a short, rather obtuse apex. The latter form is presumably found at higher altitudes.
One exceptional specimen, ANU 1652 from Mindanao, Mt Apo, has dichasial instead of mon-ochasial cymes and the petals are almost completely reduced (the flowers are still young and may have opened prematurely because of drying).


Radlk. 1879: Sapind. HolL-Ind.: 39
Radlk. 1933 – In: Engl., Pflanzenr. 98: 1172
Merr. 1918: Sp. Blanc.: 241
Gray 1854 – In: U.S. Expl. Exp. Bot.: 251
Radlk. 1912: Fl. Manila: 306
Radlk. 1933 – In: Engl., Pflanzenr. 98: 1165
Fern.-Vill. 1883: Nov. App.: 349
Welzen 1989: p. 219. – In: Leiden Bot. Series: f. 7b, 86
Miq. 1859 – In: Fl. Ind. Bat.: 568
Walp. – In: Ann.: 212
Ceron 1892: Cat. Pl. Herb. Manila: 53
Guzman et al. 1986: p. 300. – In: Guide Philipp. Fl. Fauna: f. 218
Radlk. 1913 – In: Philipp. J. Sc., Bot.: 446
Merr. 1906 – In: Philipp. J. Sc.: 87
Merr. 1923 – In: Enum. Philipp. Flow. Pl.: 508
Ceron 1892: Cat. Pl. Herb. Manila: 53
Radlk. 1933 – In: Engl., Pflanzenr. 98: 1165
Radlk. 1933 – In: Engl., Pflanzenr. 98: 1172
Radlk. 1904 – In: Perkins, Fragm. FL Philipp. 1: 63
Vidal 1886: Rev. Pl. Vase. Filip.: 95
Merr. 1923 – In: Enum. Philipp. Flow. Pl.: 509
Brown 1921 – In: Min. Prod. Philipp. For.: 204
Merr. 1923 – In: Enum. Philipp. Flow. Pl.: 507
Radlk. 1879 – In: Sitzungsber. Math.-Phys. CI. Konigl. Bayer. Akad. Wiss. Mtinchen: 614
Radlk. 1913 – In: Philipp. J. Sc, Bot.: 446