Chaetocarpus

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Chaetocarpus

Description

Trees or shrubs, dioecious. Leaves simple, distichous; Stipules very asymmetric, early caducous. Inflorescences dense axillary clusters of flowers (reduced thyrses), brachyblasts increasing in size with age. Flowers actinomorphic; Fruit a rhegma, subglobose, in Malesia outside densely echinate with glochidiate hairs, inside glabrous, dehiscing septicidally into 3(-4) segments, latter almost loculicidally split to the base; Seeds ovoid, flattened, 1-3 per fruit, black, glossy, covered in upper third by a thin aril;

Distribution

Pantropical present, W Malesia present
10 or 11 species pantropical, one species in W Malesia.

Notes

1. The third (and very seldom a fourth) inner sepal is placed within the other two sepals and is alternisepalous and thinner than the sepals. Therefore, it might as well be described as a petal (see also ). Petals are reported to be absent in Chaetocarpus and this character is considered to be the main difference with the genus Trigonopleura. Obviously, the difference between both genera is not in the complete absence or presence of petals, but in the reduced number of petals in Chaetocarpus.
2. The New Guinean specimens (Docters van Leeuwen 10234 and Takeuchi et al. 15939), identified as C. pubescens (Thwaites) Hook.f. (a species so far only known from Sri Lanka), are not added to this treatment, because the material is too poor to ascertain their identification.

Citation

Hook.f. - in Fl. Brit. India. 1887: 460
Radcl.-Sm., Gen. Euphorbicearum. 2001: 116
Whitmore - in Tree Fl. Malaya. 1973: 76
Thwaites, Nat. Pflanzenfam. 1897: 212
Welzen - in Thai Forest Bull., Bot. 2000: f. 3
Airy Shaw - in Kew Bull. 1972: 231
Gagnep. - in M.H.Lecomte, Fl. Indo-Chine 5. 1926: 471
Kurz - in Forest Fl. Burma. 1877: 408
Thwaites - in Kew Bull. 1981: 275
Müll.Arg. - in DC., Prodr. 15. 1866: 1257
Welzen - in Rheedea. 1994: 94
Pax - in Engl. & Prantl, Nat. Pflanzenfam. 3. 1890: 89
Airy Shaw - in Kew Bull. 1975: 67
G.L.Webster - in Ann. Missouri Bot. Gard. 1994: 65
Baill., Étude Euphorb. 1858: 323
Craib - in Contr. Fl. Siam, Aberdeen Univ. Stud. 1912: 194
Thwaites, Enum. Pl. Zeyl. 1861: 274
Ridl. - in Fl. Malay Penins. 1924: 310
Pax & K.Hoffm. - in Engl., Pflanzenr. 147. 1912: 7
Müll.Arg. - in DC., Prodr. 15. 1866: 1121