Alstonia

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Alstonia

Description

Shrubs or trees. Leaves in whorls (in Malesia); Inflorescence compound, cymose, terminal, pedunculate, frequently in whorls or umbellate, few- to many-flowered. Flowers 5-merous, actinomorphic, mostly fragrant. Sepals without colleters in the axils. Stamens free from the pistil; Fruit a pair of follicles (a single 2-celled follicle only in A. rostrata). Seeds numerous, elliptic, narrowly elliptic or oblong, ends rounded to acuminate, or caudate, glabrous or pubescent, long cilia forming a coma of simple hairs.

Distribution

Asia-Tropical, from the Himalayas and China to New South Wales, Australia present, from tropical Africa to Central America present
The genus has 43 species, ranging from tropical Africa to Central America, and from the Himalayas and China to New South Wales, Australia. However, it is likely that the Central American species should be removed from Alstonia, and the genus Tonduzia resurrected, as molecular work shows them not to be at all closely related (Endress, pers. comm.). In Malesia 16 species in two sections, sect. Alstonia and sect. Monuraspermum.

Citation

Benth. & Hook.f. 1876 – In: Gen. Pl. p 695
Lý 1986 – In: Feddes Repert. p 615
Pichon 1950 – In: Mém. Mus. Natl. Hist. Nat. p 168
Benth. & Hook.f. 1876 – In: Gen. Pl. p 705
Pit. 1933 – In: Lecomte, Fl. Indo-Chine 3. p 1100
Tsiang & P.T. Li 1977 – In: Fl. Reipubl. Popularis Sin. p 88
Pichon 1947 – In: Bull. Mus. Hist. Nat. (Paris). p 300
R.Br. 1993 – In: PROSEA. p 82
Pichon 1947 – In: Bull. Mus. Hist. Nat. (Paris). p 298
Lý 1986 – In: Feddes Repert. p 613
Tsiang & P.T. Li 1977 – In: Fl. Reipubl. Popularis Sin. p 95
H. Huber 1973 – In: Abeyw. (ed.), Revis. Handb. Fl. Ceylon 1. p 11
D.J. Middleton 1999 – In: Fl. Thailand. p 41
Sidiy. 1998 – In: Blumea. p 77
R.Br. 1811 – In: Mem. Wern. Nat. Hist. Soc. p 75
Monach. 1949 – In: Pacific Sci. p 137
P.T. Li et al. 1995 – In: Fl. China. p 154
Pit. 1933 – In: Lecomte, Fl. Indo-Chine 3. p 1161
R.Br. 2001 – In: PROSEA. p 61
K. Schum. 1895 – In: Engl. & Prantl, Nat. Pflanzenfam. 4. p 138
K. Schum. 1895 – In: Engl. & Prantl, Nat. Pflanzenfam. 4. p 125
Kochummen & Wong 1984 – In: Blumea. p 515
Cockburn 1976 – In: Trees Sabah. p 15
Backer & Bakh.f. 1965 – In: Fl. Java. p 226
Lý 1986 – In: Feddes Repert. p 610
Pichon 1947 – In: Bull. Mus. Hist. Nat. (Paris). p 294
Backer & Bakh.f. 1965 – In: Fl. Java. p 226
H. Huber 1983 – In: Abeyw. (ed.), Revis. Handb. Fl. Ceylon 4. p 40
D.J. Middleton 2004 – In: Tree Fl. Sabah & Sarawak. p 14