LATJRACE2E. 



three staminodes internal to its nine fertile stamens, 

 species is known, 1 from Central America. 

 Gceppertia has two-celled anthers. 



437 

 Only one 



IV. TETRANTHERA SERIES. 



Tetranthera* (figs. 256, 257) has dioecious flowers. 3 The perianth 

 has six divisions, and the androceum, sterile in the female flowers, 

 consists of from nine to twelve stamens, inserted round the rudi- 

 mentary gynscceum, which is sometimes altogether absent. These 

 stamens open by four introrse valves. 4 In the female flower is a 

 fertile gynseceum formed of a uniovulate ovary surmounted by a 

 style, whose dilated stigmatiferous head is more or less markedly 

 lobed. 5 The fruit is a one-seeded berry, supported on the shallow 

 receptacle which alone persists at its base after the fall of the 

 perianth. In certain species we find from twelve to fifteen or 

 eighteen fertile stamens, or even from thirty to thirty- six. In this 

 case, more than three (sometimes as many as six) may possess two 

 basilar lateral glands. In other species the re- 

 ceptacle forms a deeper cup with truncate edges, 

 and may be deep enough to conceal half the fruit. 

 For these species a special genus, Cylicoda/phne, 

 has been created. Of the true Tetrantheras some 

 ninety species are known, trees or shrubs from 

 tropical Asia and the neighbouring parts of Oceania; 

 and some are Australian or American. Their leaves 

 are alternate or rarely opposite, penniveined. The 

 flowers are united in groups of at least four to form 

 little pedunculate umbels or capitula, protected by involucres of 

 from four to six imbricate bracts. These little inflorescences spring 



Tetranthera glauca. 



Fig. 256. 

 Male flower {\). 



1 S. veraguense Meissn., loc. cit. 



2 Jacq., Hort. Schcenbr., i. 59, t. 113. — 

 GjEbtn., Fruct., iii. 225, t. 122.— Nees, in 

 Wall. PL Asiat. Ear., ii. 64; Syst., 508.— 

 Endl., Gen., n. 2059. — Meissn., Prodr., 177, 

 514.— Benth. & F. Muell., FL Austr., v. 304. 

 — Litscea Lamk., Diet. iii. 574 (nee J.). — 

 Tomex Thitnb., Fl. Jap., 190. — J., Gen., 440. 

 — Sebifera LoiTR., FL Cochinch., ed. Ulyssip. 

 (1790), 637. — Rexanthus LoiTR., op. cit. — Flwa 

 Gmel., Syst., 745. — Berrya Klein (nee Roxu.). 

 — ? Glabraria It., Mantiss., 156. — Schreb., 

 Gen., n. 1219 (ex Meissn.). 



3 They are occasionally polygamous. 



4 According to H. Mohl (in Ann. Sc. Nat., 

 ser. 2, iii. 313) the pollen is spherical, without 

 pores or folds in T. macrophylla ; and spherical, 

 with some twelve non-granulated spots, in Tome* 

 tetranthera, which appears to belong to this 

 genus. 



5 The male and female flowers are pretty 

 frequently constructed on the 4-type in cul- 

 tivated species. This is the ease with the one 

 whose diagram is given in fig. 2.">7, and which 

 had eight perianth-leaves, twelve stamens, all 

 introrse, and a sterile ovary. 



